418 
NEW AUSTRIAN 6-IN. BRONZE-STEEL GUN, 
with projectiles furnished with four copper rings instead of those 
coated with an alloy of zinc and tin. The results are given below 
No. of 
rounds. 
Weight of shell. 
Powder 
charge. 
M.V. 
Angles. 
Mean 
range. 
Mean errors. 
Depar¬ 
ture. 
Des¬ 
cent. 
In 
range. 
In direc¬ 
tion. 
In 
height. 
10 
10 
10 
lbs. 
(28*884) 
63*5, with cop- « 
per rings. 
y 
lbs. 
(6-2) 
13*64 
(6-0) 
13*2 
(5-8) 
12-76 
f.s. 
(477) 
1565 
(469) 
1539 
(463) 
1519 
O / 
| 2 11 
| 2 16 
| 2 21 
O / 
3 0{ 
3 2 | 
3 8 | 
yds. 
(1525) 
1667 
(1545) 
1689 
(1545) 
1689 
yds. 
(10-5) 
11-5 
(9-3) 
10-2 
(8-1) 
S-8 
yds. 
(0-56) 
0-612 
(0-56) 
0-612 
(0-58) 
0*634 
yds. 
(0-54) 
0-59 
(0-50) 
0’55 
(0-45) 
0-49 
10 
(28-444) 
62-6, with cover- > 
ing of tin & zinc ) 
(6-2) 
13-64 
(463) 
1519 
^ 2 14 
3 0 j 
(1523) 
1665 
(18-9) 
20-5 
(0-48) 
0*525 
(0-98) 
1.072 
The new projectiles gave rather more penetration against iron plates, 
and two chilled projectiles went completely through the target (5*9 ins. 
thick) at a distance of (500 m ) 547 yds. 
Such was the state of the question at the end of 1874, when the 
military Committee were compelled to abandon it for a time, in order to 
devote themselves to the new bronze-steel field guns of model 1875. 
The excellent results given by these guns induced the Committee to 
request General Uchatius to ascertain whether larger guns could not 
be made of this metal, and in particular a (15 cm ) 6-in. gun of similar 
dimensions to that of steel tried in 1874. 
General Uchatius having tested a tube of (15 cm ) 6 ins. calibre with 
similar charges to those it was proposed to use, and having found the 
limit of elasticity sufficient, two bronze-steel guns of this calibre were 
made—one with a uniform twist (No. 1 gun), and the other with 
increasing twist (No. 2 gun); the rifling, as well as the interior dimen¬ 
sions, being fixed upon by the Committee. 
In exterior dimensions and in construction the guns were identical, 
and in the latter point they resembled the field guns of 1875, except 
that in front of the breech-block slot and for the length of the powder- 
chamber they were strengthened by a strong ring of bronze-steel. 
As to the interior, however, they differed in length of rifling, as 
will be seen by the table below:— 
Rifling. 
Powder 
chamber, 
about. 
Grooves. 
O 
O 
d 
c8 
Nature of 
gun. 
Weight. 
Total 
length. 
Calibre. 
jj eng ill 
of 
bore, 
about. 
1 
| Length. 
1 
Twist. 
Length. 
Calibre. 
Capacity. 
| Number. 
P 
Breadth. 
3 
3 
o 
<D 
PM 
cwt. 
ft. 
ins. 
ins. 
cals. 
ins. 
! ins. 
lbs. 
No. 1 gun 
f(3,235) 
<■63-7 
(3,600) 
11-81 
(149)) 
5-864) 
125 
21! { 
(2535) 
99*86 
|u.l in 45 
19-5 
6-30 
615 
36 
0-06 
0-37 
205 
No. 2 gun 
63-7 
11-81 
5-864 
125 
aiq 
(2715) 
106-9 
1 1. Oto 1 in 
) 45 
19-5 
6-30 
615 
36 
0-06 
| 
0-37 
205 
