07-13-2016, 06:16 PM
First let me say I don't know the specifications of the pac nor match chamber. I've always been curios, but I've never had a reason to do the research. If you find out please post it here.
Second, I do share Bwaite's opinion here.
I greatly respect the opinion of JASmith especially on the issues of chambers. However, I'm not in full agreement with him here. Whether a "match" chamber and a SAAMI spec chamber is right for you is not a simple answer. You first need to determine how you plan to use this build.
Do you intend to stay within the SAAMI pressure limit of 52ksi or do you plan to exceed that limit to 55ksi, 60ksi, or 60ksi+? Know that if you exceed 52ksi you will be sacrificing brass life.
If you intend to stay within the 52ksi limit then stick with the proven SAAMI chamber with the compound throat and .300 neck.
If you intend to exceed 52ksi then I think the .295" neck begins to makes since in order to save some brass life as you give up nothing in a bolt action.
Once you start shooting in the 60ksi pressure range the compound throat becomes useless and you'll likely, eventually, degrade that compound angle into a single angle.
What bullets will you be shooting? Pushing the pressure limits with 123gr and below will offer little benefit if any. The heavier bullets are where you'll start to see benefit in pushing the pressures.
I'm assuming that you'll be reloading. If not, go with the SAAMI chamber.
Second, I do share Bwaite's opinion here.
I greatly respect the opinion of JASmith especially on the issues of chambers. However, I'm not in full agreement with him here. Whether a "match" chamber and a SAAMI spec chamber is right for you is not a simple answer. You first need to determine how you plan to use this build.
Do you intend to stay within the SAAMI pressure limit of 52ksi or do you plan to exceed that limit to 55ksi, 60ksi, or 60ksi+? Know that if you exceed 52ksi you will be sacrificing brass life.
If you intend to stay within the 52ksi limit then stick with the proven SAAMI chamber with the compound throat and .300 neck.
If you intend to exceed 52ksi then I think the .295" neck begins to makes since in order to save some brass life as you give up nothing in a bolt action.
Once you start shooting in the 60ksi pressure range the compound throat becomes useless and you'll likely, eventually, degrade that compound angle into a single angle.
What bullets will you be shooting? Pushing the pressure limits with 123gr and below will offer little benefit if any. The heavier bullets are where you'll start to see benefit in pushing the pressures.
I'm assuming that you'll be reloading. If not, go with the SAAMI chamber.
"Those who sacrifice liberty for security, deserve neither." Benjamin Franklin