I took some fresh handloads to the range today to see if careful resizing (measuring headspace for each round) made a difference. Here are the details:
Issue: Primers are "set back" (protruding) about 0.004" to 0.006" on cartridges fired.
Cartridge: Springfield .30-06
Brass:New Winchester
1X fired Remington
Headspace measurement to 0.375" shoulder datum line: 2.043" to 2.045"
Primers:CCI #34
Winchester Large Rifle
Powder charge: 45 grains, IMR 4895
Rifle: 5.6M Series H&R Arms M1 Garand (CMP rifle, headspace is "assumed" to be "good" (based on GO, No-GO and Field gauging at CMP)
The fired brass measures less than 2.040" (Headspace measurement to 0.375" shoulder datum line) after firing, it will also slip easily into the Wilson .30-06 case gauge.The brass shows no external signs of stress, e.g bright line at case base or bulging.
The chamber was cleaned meticulously prior to firing these rounds.
What are your thoughts on the protruding primers? I have tried mil-surp ammo (HXP) and it doesn't show any problem becasue of the primer crimp.
Your input is greatly appreciated!
Kevin
Issue: Primers are "set back" (protruding) about 0.004" to 0.006" on cartridges fired.
Cartridge: Springfield .30-06
Brass:New Winchester
1X fired Remington
Headspace measurement to 0.375" shoulder datum line: 2.043" to 2.045"
Primers:CCI #34
Winchester Large Rifle
Powder charge: 45 grains, IMR 4895
Rifle: 5.6M Series H&R Arms M1 Garand (CMP rifle, headspace is "assumed" to be "good" (based on GO, No-GO and Field gauging at CMP)
The fired brass measures less than 2.040" (Headspace measurement to 0.375" shoulder datum line) after firing, it will also slip easily into the Wilson .30-06 case gauge.The brass shows no external signs of stress, e.g bright line at case base or bulging.
The chamber was cleaned meticulously prior to firing these rounds.
What are your thoughts on the protruding primers? I have tried mil-surp ammo (HXP) and it doesn't show any problem becasue of the primer crimp.
Your input is greatly appreciated!
Kevin