It's fairly common knowledge that you have to reduce your loads when shooting solid copper bullets compared to traditional jacketed lead-core bullets. Also, similarly constructed bullets with more or less bearing surface can also greatly affect pressure as that additional bearing surface creates more friction.
Of course, it's also common knowledge that you should never just switch out a component in your load without backing off and retuning the load for that new component - whether it's new brass, a different primer, or a different bullet.
Bookmarks