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Posted: 2/24/2010 4:31:43 AM EDT
| I am reloading .243 on a LnL AP for a bolt gun. Without any crimp the Nosleer 95 gr BT bullet is tight and case mouth diameter actually below specification. I'm using Frontier brass which I assume is somewhat thin. As I move the crimping die down, crimp increases, but I'm not sure it's necessary. Thoughts? |
| Where unneeded a crimp has more potential for harm than good. In an extream example, I had tried using a LEE factory crimp on some 30-06 ammo, and I crimped it down to where the petals on the inside of the die closed up. The result of this was a 150fps loss in velocity and accuraccy was negatively affected. What I believe I did was actually swag the bullets diameter down by crimping too hard. I eliminated the crimp and loaded some idenicle ammo and velocity and accuracy came right back. The only ammo I currently crimp is semi auto rifle ammo, revolver ammo and too a lesser extent semi auto pistol ammo just to insure uniform outer dimentions and reliable feeding. |
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