Guys, the theory about shooting lighter bullets that are all copper has little to do with the expansion and a lot to do with the sectional density of the bullet. The relationship between caliber (diameter) and length. Copper is a lot less dense then lead so a 165 grain copper bullet will have to be a lot longer than a 165 grain lead bullet of the same caliber. Longer bullets need a faster twist rifling to stabilze. By dropping down a little in weight you keep the overall length about the same. As to expansion, most all of the copper alloys used in todays bullets will expand just find at any reasonable velocity. You read a lot about "poor expansion" on bullets, but think about it. In order to look at the expansion of a bullet, it first must be retreived from a dead animal. If the animal died, how did the bullet fail? Didn't drop where it was standing when shot? (Not many do.) Had to track it too far? (Let's talk about shot placement.)
Bullet selection for elk/mule deer combo hunt
- Thread starter mnbearbaiter
- Start date
noharleyyet
Well-known member
Barnes tipped & untipped, COAL no problemo, dead critters, sub MOA....yep.
Accubond same.
Partition same.
Accubond same.
Partition same.
