I have begun handloading for the 500 S&W magnum recently and am looking for some advice on pressure signs to look for when working up a load for such a high pressure cartridge. I’ve read a few times that primer flattening is normal for this round, and I’ve noticed some flattening even on my starting loads from the Hornady manual. One grain up from the starting load I’m already seeing a feint ring around the primer pocket from the case head pressing into the area of the breechface around the firing pin channel. I’m using a Hornady 500 grain XTP, WLR primers, H110 powder and a moderate crimp. The revolver is a S&W 500 with a 6.5” barrel. Any advice from those experienced with the big 500? Thanks!
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