You may have to send them out to be tested if you really want to know. I believe Precision Reloading and Tom Armbruster will do that.
I really liked the previous Herters LOw Recoil 1 oz 12 ga load at 1060 fps--I shot them in my Fox Sterlingworth pin gun, but hesitated to use them in Damascus
hammer 12's because I couldn't find the pressure specs. Still have a case of them. I loaded up a couple hundred low pressure 7/8 oz loads for them this week. BUT if your guns are fluid steel, I would shoot those new herters.
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"How kind it is that most of us will never know when we have fired our last shot"--Nash Buckingham
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