91
RIFLE BARRELS, .30 CALIBER.
No. 10298.
Section marked M 3 B.
Annealed by residual heat.
Pressure per square inch.	Barrel section.		Remarks.
	Diameter.	Expansion	
Pounds.	Inches.	Inch.	
16,300	0.980	0.	
24,450	.980	0.	
28,520	.980	0.	
32,600	.980	0.	
34,640	.981	.001	
36,670	.981	.001	
38,710	.981	.001	
40,750	.981	.001	
42,790	.981	.001	
44,820	.981	.001	
46,860	.981	.001	
48,900	.981+	.001+	
50,940	.986+	.006+	
52,970	.989	.009	
57,050	.994	.014	
61,120	1.001	.021	
16,300	.999+	.019+	
No. 10299.
Section marked M 3 B.
Annealed by residual heat.
Pressure per square inch.	Barrel section.		Remarks.
	Diameter.	Expansion.	
Pounds.	Inch.		
16,300	0.980	0.	
24,450	.980	0.	
28,520	.980	0.	
32,600	.980+	0. +	
34,640	.980+	0.+	
36,670	.980+	o.+	
38,710	.980+	0.+	
40,750	.980+		
42,790	.981	.001	
44,820	.981	.001	
46,860	.981	.001	
48,900	.981 +	.001 +	
50,940	.982+	.002+	
52,970	.986 +	.006+	
55,010	.989+	.009+	
57,050	.992	.012	
59,090	.994+	.014 +	
61,120	.998+	.018+	
16,300	.997	.017	
t