NEW AUSTRIAN 6-IN. BRONZE-STEEL GUN. 
423 
Nature of gun. 
(15 cm )6-in.B.L. 
cast-iron gun, 
m/61. 
Lead-coated 
shells, 2'3 cals; < 
weight, 61*6. 
Charge (2*15 k ) 
4-73 lbs. 
6 -in. B.L. steel 
gun of Krupp. 
Shell with two 
copper rings, 
2*8 cals. long;* 
weight, (35*5 k ) 
78*1 lbs. 
Charge(8 k )l7‘6 
lbs. 
No. of rounds. 
ft 
Angle of 
eleva 
tion. 
1 23 0 
3 3 0 
6 46 0 
11 8 0 
Mean 
range. 
(500) 
547 
j ( 1000 ) 
l 1094 
( ( 2000 ) 
( 2187 
C (3000) 
l 3281 
C (1000) 
l 1094 
( ( 2000 ) 
l 2187 
Mean errors. 
yds. 
( 0 * 21 ) 
0’23 
(0-61) 
0*667 
( 2 * 11 ) 
2*30 
(4*92) 
5*36 
(0*35) 
0*383 
(0*70) 
0*766 
yds. 
(7*6) 
8*3 
(10*3) 
11*1 
(15*5) 
16*9 
(20*5) 
22*4 
(13*6) 
14*8 
( 10 * 6 ) 
11*6 
yds. 
(0*19) 
0*208 
(0*46) 
0*503 
( 1 * 22 ) 
1*33 
(2*28) 
2*36 
(0*43) 
0*470 
( 1 * 01 ) 
1*10 
Mean 
of 
errors 
in 
height. 
}- 
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O oS ' 
o ffl. 
U -rH 
g £' 
2 13 ! 
O rd 
O ,£j 
R £ 
62-2 
27*2 
15*0 
6*5 
42*4 
42*4 
It will be seen from this table that in accuracy No. 2 gun is superior 
to No. 1; the number of shots per 100 which would strike a target 
3*28 ft. high being considerably greater with the former gun, com¬ 
mencing at (1000 m ) 1094 yds. 
This superiority is very evident at (2000 ra ) 2187 yds. range, at 
which range each gun fired more than 180 rounds; and taking the 
mean of these, we see that the number of hits per 100 shots striking 
such a target are, with No. 1 gun 38*7, and with No. 2 gun 48*7; or 
rather more than a fourth more hits in favour of the latter. 
With the same angle of elevation. No. 2 gun also gives a rather 
higher range than No. 1, the advantage being (63 ln ) 69 yds. in 
(3000 m ) 3281yds. 
On the whole, both guns proved very accurate—very much superior 
to the (15 cm ) 6-in., m/61, of which the errors in height at similar 
ranges are three times as great as those of the new guns. Compared 
with the 6-in. steel Krupp gun, the results at (2000 m ) 2187 yds. are 
about equal, but at (1000 m ) 1092 yds. they are superior. 
As to endurance, the (15 cm ) 6-in. bronze-steel guns have shown 
themselves as satisfactory as the field guns of pattern 1875. Not¬ 
withstanding considerable erosion of the bore and degradation of the 
lands, the accuracy of fire was not diminished. In both cases the 
powder-chamber has remained intact; the erosion commencing at the 
cone joining this with the shot-chamber. In this cone, and in the 
shot-chamber itself, this erosion was principally developed; the 
deepest portion being in the upper surface and having a depth of 
(3 mm ) 0*12 in. in No. 1 gun, and of (4 mm ) 0*16 in. in No. 2 gun. 
In No. 2 gun the lower lands in the shot-chamber are almost obli¬ 
terated in places; so that the employment of the rings does not prevent 
erosion, as was hoped. The rifled portion of the bore, properly so 
