93
RIFLE BARRELS, .30 CALIBER.
No. 10302.
Section marked M 3 C.
Cooled in air.
Pressure per square inch.	Barrel section.		Remarks.
	Diameter.	Expansion.	
Pounds. 16.300 24,450 28,520 32,600 34,640 36,670 38,710 40,750 42,790 44,820 46,860 48,900 50,940 52,970 55,010 57,050 59,090 61,120 16.300	Inch. 0.980 .980 .980 . 980* .980* . 980* . 980! .980* .981 .981 .981 .981 .982 .987 .991 .992+ .994+ .997 .996	Inch. 0. 0. 0. .000* .000* .000* .000* .000* .001 .001 .001 .001 .002 .007 .011 .012+ .014+ .017 .016	
No. 10303.
Section marked M 3 C.
Cooled in air.
Pressure per square inch.	Barrel section.		Remarks.
	Diameter.	Expansion.	
Pounds.	Inch.	Inch.	
16,300	0.980	0.	
24,450	.980	0.	
28,520	.980+	0.+	
• 32,600	.980+	0.+	
84,640	.980+	0.+	
36,670	.980+	0.+	
38,710	.980+		
40,750	.981	.001	
42,790	.981	.001	
44,820	.981	.001	
46,860	.981	.001	
48,900	.981 +	.001 +	
50,940	.982+	.002+	
52,970	.989	.009	
55,010	.991	.011	
57,050	.993	.013	
59,090	.995	.015	
61,120	.997+	.017+	
16,300	.996+	.016+