molonlabe
Member
Im not sure where to put this but I think it will get more exposure in rifle.
I have a load that works very good for hunting and match shooting. 168gr Sierra match king with 40 gr of IMR3031. (I use the game king for hunting). This makes <1 in groups with My M1A NM and in the Bolt Ruger M77VT it can hold ½ moa. The problem I noticed is the primers is flattened and slightly cratered coming from the M1A. I did switch to federal match but my next round I will go back to the CCI because they are harder. I don’t believe it is over pressured because the base does not look bulged. The case definitely stretched and will need to be trimmed again but that is expected since it is mil spec. I know flatting of primers isn’t a good indicator of pressures but nonetheless should be heeded.
Since I never noticed this before my question is this a problem? Is the powder too fast since it is slightly faster than 4064 for the firearms (M1A)operating curve. The groups are good and the bolt action has no problem or flat primers. Thanks for any help.
I have a load that works very good for hunting and match shooting. 168gr Sierra match king with 40 gr of IMR3031. (I use the game king for hunting). This makes <1 in groups with My M1A NM and in the Bolt Ruger M77VT it can hold ½ moa. The problem I noticed is the primers is flattened and slightly cratered coming from the M1A. I did switch to federal match but my next round I will go back to the CCI because they are harder. I don’t believe it is over pressured because the base does not look bulged. The case definitely stretched and will need to be trimmed again but that is expected since it is mil spec. I know flatting of primers isn’t a good indicator of pressures but nonetheless should be heeded.
Since I never noticed this before my question is this a problem? Is the powder too fast since it is slightly faster than 4064 for the firearms (M1A)operating curve. The groups are good and the bolt action has no problem or flat primers. Thanks for any help.