THE ROYAL ARTILLERY INSTITUTION. 
849 
Table VI. 
Comparison between the Trench canon cle 4 raye and an Armstrong B.L. 
9-pr., March 1865. 
French gun. 
Calibre ............3*406 inches. 
Weight.6 cwt. 52 lbs. 
Spiral .1 in. 26 cal. 
Length of bore ...55“5 inches. 
Grooves.. 6 
Charge .lib. 2oz. 
Weight of shell ...8 lbs. 13 oz. 
Armstrong 9«pr. 
3*00 inches. 
6 cwt. 12 lbs. 
1 in. 38 cal. 
53*0 inches. 
38 
1 lb. 2 oz. 
8 lbs. 14 oz. 
The Trench gun fired common shells, the Armstrong gun segment shells, 
in both cases plugged. 
No. 
fired 
Elevation. 
Mean 
time of 
flight 
Ranges. 
Mean 
difference 
of range. 
Mean 
reduced 
deflection. 
Min. 
Max. 
Mean. 
- 
0 
/ 
s 
Fr 
ench gv 
m. 
20 
2 
6 
2-70 
685 
797 
762 
27*0 
0*6 
20 
6 
3 
6-53 
1404 
1551 
1495 
31*0 
1*7 
20 
10 
2 
9*95 
2250 
2453 
2340 
30*4 
6*0 
Armstrong 9-pr. 
20 
2 
6 
2*56 
729 
810 
770 
13*6 
0*7 
20 
'5 
3 
5*72 
1555 
1688 
1628 
23*8 
1*3 
20 
10 
2 
10*27 
2593 
2751 
2673 
39*9 
6*2 
Both guns were then fired at targets 18 x 9 ft. at a distance of 1000 yds. 
The Trench put six shots through before graze and eight en ricochet . The 
9-pr. put thirteen through before graze, and two en ricochet, on the whole 
only one more than its rival. 
Lastly, they were fired against time. The Trench fired 20 rounds in 
4 m 20 s being sponged each time. The breech loader which was not sponged, 
fired 20 rounds in 3 m 10 s . 
10. Thus it will be seen that the brass muzzle loader held its own 
remarkably well at all points against the breech loader, and on the whole 
they may be considered as very fairly matched. Since, however, the canon de 
4 raye would have to cope with the 12-pr. as well as the 9-pr. I subjoin 
the mean of 13 series, principally of 20 rounds each, fired on different 
occasions with the latter. 
