Originally Posted by _The_Shadow
What some of you don't realize is that the 100% copper bullets are very long for their weight. The 155 Barnes TAC-XP is longer than a Hornady 200 XTP, thus the bullet occupies powder space and will raise chamber pressures. Finding a balance of velocity/performance versus pressure will be paramount!
Also over driving any HP design can roll back the expansion past it maximum and shed petals or become a smaller diameter too guickly.
You may very well be correct on all accounts but again, then isn't that a glaring reason against copper? If its converting your 10mm into a .40 then there is no reason. Jmo
Unfortunately, with all the advances in medical science, there still just isnt any cure for "stupid".