I keep finding stuff in my files that are likely to be of interest to NavWeaps members. Here is another document -
US Library of Congress Reference:
Dispersion Errors of Guns
E-12-d File: 6770A
Grp: 38 Ent:: 98 Box: 864
Document Title - "Performance of British Naval Guns as regards Dispersion"
From - "THE ADMIRAL COMMANDING , FIRST BATTLE SQUADRON" (Stamped "GRAND FLEET")
Date - 30th June, 1918
No. - 194/14
Title - "PERFORMANCE OF BRITISH NAVAL GUNS AS REGARDS DISPERSION"
With reference to minute dated 5th June, 1918, File 63. addressed by the Rear Admiral Commanding, Sixth Battle Squadron to the Commander-in-Chief, Grand Fleet, asking for information concerning the performance of British Naval guns on actual firings at sea as regards dispersion, the spreads obtained by ships of the First Battle Squadron with main and secondary armament are annexed.
2. These spreads have been selected from full charge firings which have been reliably marked. The variations in the spread obtained by the same ship in different firings are remarkable, and can only be accounted for by cordite lot differences., or possibly by incorrect adjustments of the rammer cut off.
3. It is considered that the average spread as shewn in the attached tables is typical of that which may be expected under action conditions, when special precautions cannot be taken as regards all guns using the same lot of cordite at the same time.
(Enclosure in First Battle Squadron Communication of 30th June, 1918, No. 194/14)
MEAN SPREAD OF 15-INCH, 13.5-INCH AND 6-INCH GUNS OF SHIPS IN THE FIRST BATTLE SQUADRON.
SHIP - - - - - - - - - - - - - DATE - - - - MEAN RANGE - - - - MEAN SPRD 4/5 GUNS - - - - M. V. - - - REMARKS
TYPE OF GUN - 15-INCH MARK I
REVENGE - - - - -- - - - -30.5.17 - - - 22100 - - - - - - - - - 154 - - - - - - - - - - - - - - - - - - - - 2420 - - - - Checked by photography.
REVENGE - - - - -- - - - -24.6.18 - - - 21000 - - - - - - - - - 150-200 - - - - - - - - - - - - - - - - -2420 - - - - One 6 gun broadside spread 175. All checked by photography.
RESOLUTION - - - - - - - 27.2.17 - - - -10400 - - - - - - - - -300 - - - - - - - - - - - - - - - - - - - - 2438
RESOLUTION - - - - - - - 30.5.17 - - - 22500 - - - - - - - - -200-300 - - - - - - - - - - - - - - - - -2435 - - - - Occasional long spread up to 400.
RESOLUTION - - - - - - - 24.6.18 - - - 21000 - - - - - - - - -125-200 - - - - - - - - - - - - - - - - - 2430 - - - - One 6 gun broadside spread 300. All checked by photography.
RAMILLIES - - - - - - - - - 8.4.18 - - - -17200 - - - - - - - - - 340 - - - - - - - - - - - - - - - - - - - - 2440
RAMILLIES - - - - - - - - - 24.6.18 - - -21000 - - - - - - - - - 175 - - - - - - - - - - - - - - - - - - - - -2440 - - - - Two 8 gun broadsides averaging 250. All checked by photography.
ROYAL SOVEREIGN - - - 30.5.17 - - -21250 - - - - - - - - - 400 - - - - - - - - - - - - - - - - - - - - -2440 - - - -5 Lot Nos. of cordite used in this practice.
ROYAL OAK - - - - - - - - 23.7.16 - - - 16000 - - - - - - - - -180 - - - - - - - - - - - - - - - - - - - - - 2440
ROYAL OAK - - - - - - - - 30.5.17 - - -20000 - - - - - - - - -400 - - - - - - - - - - - - - - - - - - - - -2430 - - - -Checked by photography.
A V E R A G E - - - - - - - - - - - - - - - - - - - - - - - - - - - - -255
TYPE OF GUN - 13.5-INCH MARK V
EMPEROR OF INDIA - - -17.3.16 - - - 17500 - - - - - - - - - -430 - - - - - - - - - - - - - - - - - - - - -2450
EMPEROR OF INDIA - - -20.8.16 - - -16500 - - - - - - - - - -300 - - - - - - - - - - - - - - - - - - - - -2450
BENBOW - - - - - - - - - -31.5.17 - - - 17500 - - - - - - - - - -200
MARLBOROUGH - - - - -Oct 17 - - - 18600 - - - - - - - - - -282 - - - - - - - - - - - - - - - - - - - - -2464
MARLBOROUGH - - - - -May17 - - - 11800 - - - - - - - - - -260 - - - - - - - - - - - - - - - - - - - - -2430
MARLBOROUGH - - - - -Jun18 - - - -20500 - - - - - - - - - 287 - - - - - - - - - - - - - - - - - - - - -2425 - - - - One 10 gun salvo 440. All checked by photography.
IRON DUKE - - - - - - - - -24.12.14 - - 16000 - - - - - - - - - 330 - - - - - - - - - - - - - - - - - - - - -2470
IRON DUKE - - - - - - - - -24.12.14 - - 15500 - - - - - - - - - 340 - - - - - - - - - - - - - - - - - - - - -2470
IRON DUKE - - - - - - - - - 19.4.15 - - -13500 - - - - - - - - - 270 - - - - - - - - - - - - - - - - - - - - -2470 - - - - Individual.
IRON DUKE - - - - - - - - - 2.8.15 - - - 16500 - - - - - - - - - 240 - - - - - - - - - - - - - - - - - - - - -2460 - - - - Individual.
IRON DUKE - - - - - - - - - 17.3.16 - - -16000 - - - - - - - - - 450 - - - - - - - - - - - - - - - - - - - - -2450 - - - - Director.
IRON DUKE - - - - - - - - - 23.10.16 - -14000 - - - - - - - - -230 - - - - - - - - - - - - - - - - - - - - - 2430 - - - - Director.
IRON DUKE - - - - - - - - - 31.5.17 - - -17500 - - - - - - - - - 325 - - - - - - - - - - - - - - - - - - - - - 2428 - - - - Director.
IRON DUKE - - - - - - - - - 17.6.18 - - -20000 - - - - - - - - -320 - - - - - - - - - - - - - - - - - - - - - 2422 - - - - Checked by photography. One 8 gun salvo - 448.
A V E R A G E - - - - - - - - - - - - - - - - - - - - - - - - - - - - -300
TYPE OF GUN - 14-INCH MARK I
CANADA - - - - - - - - - - -17.3.16 - - -14300 - - - - - - - - - 150-200 - - - - - - - - - - - - - - - - - -2450 - - - - Director & Individual.
CANADA - - - - - - - - - - -29.8.16 - - 14300 - - - - - - - - - 100 - - - - - - - - - - - - - - - - - - - - - 2450 - - - - Director.
CANADA - - - - - - - - - - -24.6.18 - - 14300 - - - - - - - - - 215 - - - - - - - - - - - - - - - - - - - - - 2450 - - - - Director. Checked by photography.
A V E R A G E - - - - - - - - - - - - - - - - - - - - - - - - - - - - 160
TYPE OF GUN - 6-INCH MARK XII GUN OF ROYAL SOVEREIGN CLASS
REVENGE - - - - - - - - - -24.4.17 - - - -8600 - - - - - - - - -225 - - - - - - - - - - - - - - - - - - - - - 2750
REVENGE - - - - - - - - - - 24.4.17 - - - -9500 - - - - - - - - -300 - - - - - - - - - - - - - - - - - - - - -2750
REVENGE- - - - - - - - - - 20.9.17 - - - -10600 - - - - - - - - -375 - - - - - - - - - - - - - - - - - - - - -2750
RESOLUTION - - - - - - - -24.4.17 - - - - 9000 - - - - - - - - -150-200 - - - - - - - - - - - - - - - - - 2750
RESOLUTION- - - - - - - -20.9.17 - - - -10500 - - - - - - - - -200-250 - - - - - - - - - - - - - - - - -2750
RESOLUTION- - - - - - - -22.12..17 - - - 11800 - - - - - - - - -200 - - - - - - - - - - - - - - - - - - - - -2750
RAMILLIES - - - - - - - - - 9.11..17 - - - - -7600 - - - - - - - - - 370 - - - - - - - - - - - - - - - - - - - - -2750
RAMILLIES- - - - - - - - - 12.1.18 - - - - -10600 - - - - - - - - -530 - - - - - - - - - - - - - - - - - - - - -2750
RAMILLIES- - - - - - - - - 2.3.18 - - - - - -7900 - - - - - - - - -385 - - - - - - - - - - - - - - - - - - - - -2750
ROYAL SOVEREIGN - - -2.5.17 - - - - - -9800 - - - - - - - - -400 - - - - - - - - - - - - - - - - - - - - -2750
ROYAL SOVEREIGN- - - 28.6.17 - - - -- 11250 - - - - - - - - -300 - - - - - - - - - - - - - - - - - - - - -2750
ROYAL SOVEREIGN- - - 24.12.- - - - - - 9600 - - - - - - - - - 180 - - - - - - - - - - - - - - - - - - - - -2750
A V E R A G E - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 305
TYPE OF GUN - 6-INCH MARK VII GUN OF IRON DUKE CLASS
EMPEROR OF INDIA - - -8.10.17 - - - 10500 - - - - - - - - - -400 - - - - - - - - - - - - - - - - - - - - -2725
BENBOW - - - - - - - - - -30.5.17 - - - 10900 - - - - - - - - - -280 - - - - - - - - - - - - - - - - - - - - -2725
BENBOW - - - - - - - - - -19.3.18 - - - -10500 - - - - - - - - - 300 - - - - - - - - - - - - - - - - - - - - - 2725
MARLBOROUGH - - - - -May 16 - - - 10600 - - - - - - - - - 320 - - - - - - - - - - - - - - - - - - - - - 2725
MARLBOROUGH - - - - -Apr 17 - - - -11800 - - - - - - - - - 330 - - - - - - - - - - - - - - - - - - - - - 2725
MARLBOROUGH - - - - -Dec 17 - - - - 9200 - - - - - - - - - 255 - - - - - - - - - - - - - - - - - - - - - 2725
MARLBOROUGH - - - - -Jun 18 - - - - 11500 - - - - - - - - -404 - - - - - - - - - - - - - - - - - - - - -2725 - - - - Checked by photograph.
IRON DUKE - - - - - - - - -4.4.17 - - - - 10500 - - - - - - - - - 350 - - - - - - - - - - - - - - - - - - - - -2665
IRON DUKE - - - - - - - - 14.5.17 - - - - -9200 - - - - - - - - - 500 - - - - - - - - - - - - - - - - - - - - -2665
IRON DUKE - - - - - - - - 14.5.17- - - - - 8000 - - - - - - - - - 450 - - - - - - - - - - - - - - - - - - - - -2665
IRON DUKE - - - - - - - - 20.9.17 - - - - 10000 - - - - - - - - - 200 - - - - - - - - - - - - - - - - - - - - -2665
IRON DUKE - - - - - - - - 8.10..17 - - - - -9000 - - - - - - - - -250 - - - - - - - - - - - - - - - - - - - - -2665
A V E R A G E - - - - - - - - - - - - -- - - - - - - - - - - - - - - - 336
TYPE OF GUN - 6-INCH MARK XVII GUN IN H.M.S. CANADA
CANADA - - - - - - - - - 8.10.17 - - - - 10000 - - - - - - - - - 225 - - - - - - - - - - - - - - - - - - - - -2850
CANADA - - - - - - - - - 16.10.17 - - - - 9000 - - - - - - - - - 200 - - - - - - - - - - - - - - - - - - - - -2850
CANADA - - - - - - - - - 16.10.17 - - - -11000 - - - - - - - - - 175 - - - - - - - - - - - - - - - - - - - - -2850
CANADA - - - - - - - - - 9.11.17 - - - - -10000 - - - - - - - - -300 - - - - - - - - - - - - - - - - - - - - -2850
CANADA - - - - - - - - - 22.12..17 - - - -11800 - - - - - - - - - 250 - - - - - - - - - - - - - - - - - - - - -2850
CANADA - - - - - - - - - 9.3.18 - - - - - 10000 - - - - - - - - - 200 - - - - - - - - - - - - - - - - - - - - -2850
CANADA - - - - - - - - - 18.6.18 - - - - -12300 - - - - - - - - - 200 - - - - - - - - - - - - - - - - - - - - -2850
CANADA - - - - - - - - - 18.6.18 - - - - -10000 - - - - - - - - -150 - - - - - - - - - - - - - - - - - - - - -2850
A V E R A G E - - - - - - - - - - - - -- - - - - - - - - - - - - - - - 212
The following information regarding the dispersion errors of British guns has been obtained from the Admiralty at the personal request of Rear Admiral Strauss, Chief of Bureau of Ordnance, who stated that he wrote me direct as he was in a hurry for the information.
The Admiralty informs me that the dispersion errors for four representative guns are as follows -
Mean Errors at Range and Accuracy Practice
Gun Type - - - - - - - - - - 5000 yds - - - - - 10,000 yds - - - - - 15,000 yds
4" Q.F. Mark V. - - - - - - - - 26 yds. - - - - - - - 30 yds. - - - - - - - - - - - - - -
6" B.L. Mark XII - - - - - - - - 21 yds. - - - - - - - 25 yds. - - - - - - - 34 yds.
13.5" B.L. Mark V - - - - - - - - - - - - - - - - - - 16 yds. - - - - - - - - 18 yds.
15" B.L. Mark I - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 19 yds.
Enjoy,
B
US Library of Congress Reference:
Dispersion Errors of Guns
E-12-d File: 6770A
Grp: 38 Ent:: 98 Box: 864
Document Title - "Performance of British Naval Guns as regards Dispersion"
From - "THE ADMIRAL COMMANDING , FIRST BATTLE SQUADRON" (Stamped "GRAND FLEET")
Date - 30th June, 1918
No. - 194/14
Title - "PERFORMANCE OF BRITISH NAVAL GUNS AS REGARDS DISPERSION"
With reference to minute dated 5th June, 1918, File 63. addressed by the Rear Admiral Commanding, Sixth Battle Squadron to the Commander-in-Chief, Grand Fleet, asking for information concerning the performance of British Naval guns on actual firings at sea as regards dispersion, the spreads obtained by ships of the First Battle Squadron with main and secondary armament are annexed.
2. These spreads have been selected from full charge firings which have been reliably marked. The variations in the spread obtained by the same ship in different firings are remarkable, and can only be accounted for by cordite lot differences., or possibly by incorrect adjustments of the rammer cut off.
3. It is considered that the average spread as shewn in the attached tables is typical of that which may be expected under action conditions, when special precautions cannot be taken as regards all guns using the same lot of cordite at the same time.
(Enclosure in First Battle Squadron Communication of 30th June, 1918, No. 194/14)
MEAN SPREAD OF 15-INCH, 13.5-INCH AND 6-INCH GUNS OF SHIPS IN THE FIRST BATTLE SQUADRON.
SHIP - - - - - - - - - - - - - DATE - - - - MEAN RANGE - - - - MEAN SPRD 4/5 GUNS - - - - M. V. - - - REMARKS
TYPE OF GUN - 15-INCH MARK I
REVENGE - - - - -- - - - -30.5.17 - - - 22100 - - - - - - - - - 154 - - - - - - - - - - - - - - - - - - - - 2420 - - - - Checked by photography.
REVENGE - - - - -- - - - -24.6.18 - - - 21000 - - - - - - - - - 150-200 - - - - - - - - - - - - - - - - -2420 - - - - One 6 gun broadside spread 175. All checked by photography.
RESOLUTION - - - - - - - 27.2.17 - - - -10400 - - - - - - - - -300 - - - - - - - - - - - - - - - - - - - - 2438
RESOLUTION - - - - - - - 30.5.17 - - - 22500 - - - - - - - - -200-300 - - - - - - - - - - - - - - - - -2435 - - - - Occasional long spread up to 400.
RESOLUTION - - - - - - - 24.6.18 - - - 21000 - - - - - - - - -125-200 - - - - - - - - - - - - - - - - - 2430 - - - - One 6 gun broadside spread 300. All checked by photography.
RAMILLIES - - - - - - - - - 8.4.18 - - - -17200 - - - - - - - - - 340 - - - - - - - - - - - - - - - - - - - - 2440
RAMILLIES - - - - - - - - - 24.6.18 - - -21000 - - - - - - - - - 175 - - - - - - - - - - - - - - - - - - - - -2440 - - - - Two 8 gun broadsides averaging 250. All checked by photography.
ROYAL SOVEREIGN - - - 30.5.17 - - -21250 - - - - - - - - - 400 - - - - - - - - - - - - - - - - - - - - -2440 - - - -5 Lot Nos. of cordite used in this practice.
ROYAL OAK - - - - - - - - 23.7.16 - - - 16000 - - - - - - - - -180 - - - - - - - - - - - - - - - - - - - - - 2440
ROYAL OAK - - - - - - - - 30.5.17 - - -20000 - - - - - - - - -400 - - - - - - - - - - - - - - - - - - - - -2430 - - - -Checked by photography.
A V E R A G E - - - - - - - - - - - - - - - - - - - - - - - - - - - - -255
TYPE OF GUN - 13.5-INCH MARK V
EMPEROR OF INDIA - - -17.3.16 - - - 17500 - - - - - - - - - -430 - - - - - - - - - - - - - - - - - - - - -2450
EMPEROR OF INDIA - - -20.8.16 - - -16500 - - - - - - - - - -300 - - - - - - - - - - - - - - - - - - - - -2450
BENBOW - - - - - - - - - -31.5.17 - - - 17500 - - - - - - - - - -200
MARLBOROUGH - - - - -Oct 17 - - - 18600 - - - - - - - - - -282 - - - - - - - - - - - - - - - - - - - - -2464
MARLBOROUGH - - - - -May17 - - - 11800 - - - - - - - - - -260 - - - - - - - - - - - - - - - - - - - - -2430
MARLBOROUGH - - - - -Jun18 - - - -20500 - - - - - - - - - 287 - - - - - - - - - - - - - - - - - - - - -2425 - - - - One 10 gun salvo 440. All checked by photography.
IRON DUKE - - - - - - - - -24.12.14 - - 16000 - - - - - - - - - 330 - - - - - - - - - - - - - - - - - - - - -2470
IRON DUKE - - - - - - - - -24.12.14 - - 15500 - - - - - - - - - 340 - - - - - - - - - - - - - - - - - - - - -2470
IRON DUKE - - - - - - - - - 19.4.15 - - -13500 - - - - - - - - - 270 - - - - - - - - - - - - - - - - - - - - -2470 - - - - Individual.
IRON DUKE - - - - - - - - - 2.8.15 - - - 16500 - - - - - - - - - 240 - - - - - - - - - - - - - - - - - - - - -2460 - - - - Individual.
IRON DUKE - - - - - - - - - 17.3.16 - - -16000 - - - - - - - - - 450 - - - - - - - - - - - - - - - - - - - - -2450 - - - - Director.
IRON DUKE - - - - - - - - - 23.10.16 - -14000 - - - - - - - - -230 - - - - - - - - - - - - - - - - - - - - - 2430 - - - - Director.
IRON DUKE - - - - - - - - - 31.5.17 - - -17500 - - - - - - - - - 325 - - - - - - - - - - - - - - - - - - - - - 2428 - - - - Director.
IRON DUKE - - - - - - - - - 17.6.18 - - -20000 - - - - - - - - -320 - - - - - - - - - - - - - - - - - - - - - 2422 - - - - Checked by photography. One 8 gun salvo - 448.
A V E R A G E - - - - - - - - - - - - - - - - - - - - - - - - - - - - -300
TYPE OF GUN - 14-INCH MARK I
CANADA - - - - - - - - - - -17.3.16 - - -14300 - - - - - - - - - 150-200 - - - - - - - - - - - - - - - - - -2450 - - - - Director & Individual.
CANADA - - - - - - - - - - -29.8.16 - - 14300 - - - - - - - - - 100 - - - - - - - - - - - - - - - - - - - - - 2450 - - - - Director.
CANADA - - - - - - - - - - -24.6.18 - - 14300 - - - - - - - - - 215 - - - - - - - - - - - - - - - - - - - - - 2450 - - - - Director. Checked by photography.
A V E R A G E - - - - - - - - - - - - - - - - - - - - - - - - - - - - 160
TYPE OF GUN - 6-INCH MARK XII GUN OF ROYAL SOVEREIGN CLASS
REVENGE - - - - - - - - - -24.4.17 - - - -8600 - - - - - - - - -225 - - - - - - - - - - - - - - - - - - - - - 2750
REVENGE - - - - - - - - - - 24.4.17 - - - -9500 - - - - - - - - -300 - - - - - - - - - - - - - - - - - - - - -2750
REVENGE- - - - - - - - - - 20.9.17 - - - -10600 - - - - - - - - -375 - - - - - - - - - - - - - - - - - - - - -2750
RESOLUTION - - - - - - - -24.4.17 - - - - 9000 - - - - - - - - -150-200 - - - - - - - - - - - - - - - - - 2750
RESOLUTION- - - - - - - -20.9.17 - - - -10500 - - - - - - - - -200-250 - - - - - - - - - - - - - - - - -2750
RESOLUTION- - - - - - - -22.12..17 - - - 11800 - - - - - - - - -200 - - - - - - - - - - - - - - - - - - - - -2750
RAMILLIES - - - - - - - - - 9.11..17 - - - - -7600 - - - - - - - - - 370 - - - - - - - - - - - - - - - - - - - - -2750
RAMILLIES- - - - - - - - - 12.1.18 - - - - -10600 - - - - - - - - -530 - - - - - - - - - - - - - - - - - - - - -2750
RAMILLIES- - - - - - - - - 2.3.18 - - - - - -7900 - - - - - - - - -385 - - - - - - - - - - - - - - - - - - - - -2750
ROYAL SOVEREIGN - - -2.5.17 - - - - - -9800 - - - - - - - - -400 - - - - - - - - - - - - - - - - - - - - -2750
ROYAL SOVEREIGN- - - 28.6.17 - - - -- 11250 - - - - - - - - -300 - - - - - - - - - - - - - - - - - - - - -2750
ROYAL SOVEREIGN- - - 24.12.- - - - - - 9600 - - - - - - - - - 180 - - - - - - - - - - - - - - - - - - - - -2750
A V E R A G E - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 305
TYPE OF GUN - 6-INCH MARK VII GUN OF IRON DUKE CLASS
EMPEROR OF INDIA - - -8.10.17 - - - 10500 - - - - - - - - - -400 - - - - - - - - - - - - - - - - - - - - -2725
BENBOW - - - - - - - - - -30.5.17 - - - 10900 - - - - - - - - - -280 - - - - - - - - - - - - - - - - - - - - -2725
BENBOW - - - - - - - - - -19.3.18 - - - -10500 - - - - - - - - - 300 - - - - - - - - - - - - - - - - - - - - - 2725
MARLBOROUGH - - - - -May 16 - - - 10600 - - - - - - - - - 320 - - - - - - - - - - - - - - - - - - - - - 2725
MARLBOROUGH - - - - -Apr 17 - - - -11800 - - - - - - - - - 330 - - - - - - - - - - - - - - - - - - - - - 2725
MARLBOROUGH - - - - -Dec 17 - - - - 9200 - - - - - - - - - 255 - - - - - - - - - - - - - - - - - - - - - 2725
MARLBOROUGH - - - - -Jun 18 - - - - 11500 - - - - - - - - -404 - - - - - - - - - - - - - - - - - - - - -2725 - - - - Checked by photograph.
IRON DUKE - - - - - - - - -4.4.17 - - - - 10500 - - - - - - - - - 350 - - - - - - - - - - - - - - - - - - - - -2665
IRON DUKE - - - - - - - - 14.5.17 - - - - -9200 - - - - - - - - - 500 - - - - - - - - - - - - - - - - - - - - -2665
IRON DUKE - - - - - - - - 14.5.17- - - - - 8000 - - - - - - - - - 450 - - - - - - - - - - - - - - - - - - - - -2665
IRON DUKE - - - - - - - - 20.9.17 - - - - 10000 - - - - - - - - - 200 - - - - - - - - - - - - - - - - - - - - -2665
IRON DUKE - - - - - - - - 8.10..17 - - - - -9000 - - - - - - - - -250 - - - - - - - - - - - - - - - - - - - - -2665
A V E R A G E - - - - - - - - - - - - -- - - - - - - - - - - - - - - - 336
TYPE OF GUN - 6-INCH MARK XVII GUN IN H.M.S. CANADA
CANADA - - - - - - - - - 8.10.17 - - - - 10000 - - - - - - - - - 225 - - - - - - - - - - - - - - - - - - - - -2850
CANADA - - - - - - - - - 16.10.17 - - - - 9000 - - - - - - - - - 200 - - - - - - - - - - - - - - - - - - - - -2850
CANADA - - - - - - - - - 16.10.17 - - - -11000 - - - - - - - - - 175 - - - - - - - - - - - - - - - - - - - - -2850
CANADA - - - - - - - - - 9.11.17 - - - - -10000 - - - - - - - - -300 - - - - - - - - - - - - - - - - - - - - -2850
CANADA - - - - - - - - - 22.12..17 - - - -11800 - - - - - - - - - 250 - - - - - - - - - - - - - - - - - - - - -2850
CANADA - - - - - - - - - 9.3.18 - - - - - 10000 - - - - - - - - - 200 - - - - - - - - - - - - - - - - - - - - -2850
CANADA - - - - - - - - - 18.6.18 - - - - -12300 - - - - - - - - - 200 - - - - - - - - - - - - - - - - - - - - -2850
CANADA - - - - - - - - - 18.6.18 - - - - -10000 - - - - - - - - -150 - - - - - - - - - - - - - - - - - - - - -2850
A V E R A G E - - - - - - - - - - - - -- - - - - - - - - - - - - - - - 212
The following information regarding the dispersion errors of British guns has been obtained from the Admiralty at the personal request of Rear Admiral Strauss, Chief of Bureau of Ordnance, who stated that he wrote me direct as he was in a hurry for the information.
The Admiralty informs me that the dispersion errors for four representative guns are as follows -
Mean Errors at Range and Accuracy Practice
Gun Type - - - - - - - - - - 5000 yds - - - - - 10,000 yds - - - - - 15,000 yds
4" Q.F. Mark V. - - - - - - - - 26 yds. - - - - - - - 30 yds. - - - - - - - - - - - - - -
6" B.L. Mark XII - - - - - - - - 21 yds. - - - - - - - 25 yds. - - - - - - - 34 yds.
13.5" B.L. Mark V - - - - - - - - - - - - - - - - - - 16 yds. - - - - - - - - 18 yds.
15" B.L. Mark I - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 19 yds.
Enjoy,
B
statistics: Posted by Blutarski — 2:22 AM - 1 day ago — Replies 0 — Views 227