THE) ROYAL ARTILLERY INSTITUTION. 
315 
Ranges with Solid Shot and Segment Shell.* 
§ 
No. of 
rounds .f 
B.L. 
M.L. 
"el 
> 
mean 
range. 
mean 
error. 
mean 
range. 
mean 
error. 
Remarks. 
solid shot 
yds. 
yds. 
yds. 
yds. 
0 
18 
466 
10-8 
514 
19-0 
Range of M.L. 8 per cent above B.L.=6' elevation.^ 
1 
12 
846 
11-8 
931 
10-7 
// M.L. 9 n n 13' n 
2 
18 
1186 
19-7 
1265 
11-7 
3 
18 
1492 
18-6 
1598 
12-9 
t, M.L. 7 /, « 21' „ 
4 
18 
1770 
17-9 
1923 
15-9 
5 
18 
2115 
28-1 
2230 
23-1 
M.L. 5 per cent above ; == 22' elevation. 
6 
18 
2384 
27-9 
2564 
20-6 
7 
18 
2684 
27-2 
2855 
18-4 
M.L. 6 per cent above; = 35' elevation. 
8 
18 
2975 
21-4 
3099 
20-8 
9 
18 
3224 
23-0 
3327 
27*1 
10 
18 
3460 
19-0 
3524 
32-7 
M.L. 2 per cent above; — 16' elevation. 
15 
9 
4710 
32-0 
4719 
45-1 
25 
9 
5988 
54-9 
5981 
49-5 
> Both guns equal in range. 
33° 
9 
6788 
75-9 
6774 
68- 
) 
Sums of the ratios of mean errors f B.L. 19‘3 
in ranges. £ M.L. 18*8 
After the guns had fired 2800 rounds. 
5° 
20 
segment 
shell. 
1848 
25*9 
1925 
18*7 
0 
16 
505 
16-0 
568 
12-7 
Range of M.L. 12 per cent above B.L.j = 12'elevation. 
3 
18 
1445 
15*3 
1607 
20-5 
11 „ n 26' „ 
5 
17 
2080 
31*2 
2277 
31*5 
8 n ii 39' n 
7 
17 
2644 
34‘9 
2798 
57*8 
5 n a 42' n 
10 
15 
3300 
87‘0 
3000 
71*1 
8 it a 1° 19' „ 
Sums of the ratios of mean errors ( B.L* 6-92 
in ranges* t M.L. 6*82 
The comparisons in the column of remarks are deduced bj the Committee 
from the general results of the practice. It appears from them that the 
muzzle-loader gave a rather longer range than the breech-loader both 
with solid shot and segment shell. In uniformity of range it was also 
slightly superior with solid shot, but inferior with segment shell* On the 
whole there was no important difference between the two guns. 
The trial at 5° elevation after each of the guns had fired 2800 rounds Was 
an interesting feature of the experiment* The falling off in mean range 
with the breech-loader was from 2115 yards to 1848 yards equivalent to 
43' of elevation. With the muzzle-loader the range fell from 2230 yards 
to 1925 yards, or 14 per cent, equivalent to 1° of elevation. 
This loss of range was apparently due to the escape of gas consequent on 
the enlargement of the bores during the course of the experiment. The 
bore of the breech-loader was enlarged from *029 to *036 inch in front of 
the seat of the shot. The bore of the muzzle-loader was enlarged only to 
the extent of *003 inch, but there was also very much scoring all round and 
* Report, p. 18. 
f After elimination of a per centage of the most unfavourable results. 
X This is the increase of elevation which the breech-loader would require to obtain the same 
range. 
