The difference in energy seems small (I am looking at the difference between small pistol and small rifle magnums). However, the percentage difference is significant (about 24%). Understand that the primer is the initiator (starts the "big light"). I don't really want to change something arbitrarily in the range of 24%.
Best to work the load up when you change components. I remember standing next to a fellow on the trap line with a fine Pigeon Grade Model 12. When he fired, the gun locked up (the Model 12 Winchester is one of the strongest shotguns ever made). I looked at the shotgun, and the shell head had flowed around the breech bolt and spread the receiver. A VERY expensive lesson on blindly changing components. If that had been a fine double I would have been picking shrapnel out of my hair...
Just because a feller can get away with it doesn't make it right...
Dale53
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