Glock Talk - View Single Post - Gelatin test: 10mm 155 gr Barnes TAC-XP

_The_Shadow · 01-28-2013, 08:51

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.

01-28-2013, 08:51	#6
_The_Shadow Ret. Fireman Join Date: Jul 2007 Location: Southeast, LoUiSiAna Posts: 3,891	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. __________________ Southeast, LoUiSiAna NRA Life Member BASS Life Member