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GIFFROY · 01-17-2012, 07:50 AM

I got a good load with :
bullet : H&N (copperised lead) 86 grains HS RN .311
primer : Winchester Small Pistol Standard
case : Winchester trimmed to 21,5 mm
powder : (French) Vectan BA-9 : 5,1 grains
cartridge length : 29,6 mm
I measured the velocity of ten rounds and obtained the following results :
Mean : μ = 363,3 m/s
Maximum dispersion : dm = 18 m/s
Standard deviation σ = 5,1 m/s
No signs of overpressure and good functioning of the weapon.

01-17-2012, 07:50 AM	#20
GIFFROY User Join Date: Oct 2011 Posts: 19 Thanks: 11 Thanked 5 Times in 4 Posts	I got a good load with : bullet : H&N (copperised lead) 86 grains HS RN .311 primer : Winchester Small Pistol Standard case : Winchester trimmed to 21,5 mm powder : (French) Vectan BA-9 : 5,1 grains cartridge length : 29,6 mm I measured the velocity of ten rounds and obtained the following results : Mean : μ = 363,3 m/s Maximum dispersion : dm = 18 m/s Standard deviation σ = 5,1 m/s No signs of overpressure and good functioning of the weapon.