So I am pulling about 20ish .300BO Cartridges due to them being to short. I am seeing dents in the mouth of the brass. Is this due to over crimping? This was brand new American Eagle Brass that has been chamferred and deburred.
Is This A Result of Over Crimping?
- Thread starter RLinNH
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To me that looks like the inside of the case neck isn't chamfered enough or the case mouth isn't expanded enough after sizing and the bullet is catching a section of the neck as it's seated, folding the neck down.
And your phone is too close to focus on the case. If you hold it further away so it can focus, if we wanted we could then zoom in to see it up close.
And your phone is too close to focus on the case. If you hold it further away so it can focus, if we wanted we could then zoom in to see it up close.
When I use the C.O.L., the bullet is not seated enough to catch the cannelure. I am thinking that is where the brass is pushing in on the cannelure, where it does meet it.
Looks like misaligned dies, maybe. You’d be finding lead shavings in your equipment if the bullet was doing this.
How did you pull the bullets? What kind of puller did you use? I've seen bullets bounce up from a kinetic puller & ding the case mouth like that too.
Doesn't look like crimp damage to me. Do any of your loaded rounds have marks you can see? Second what cryptic said as well - what kind of puller?
Bullet bouncing back in the mouth after the hit? I use a collet puller so that is just a guess...
You could try a few different impact surfaces (concrete vs. carpeted floor etc.) as well as different material down inside the hammer, and see if anything mitigates the bounce back.
As others have mentioned, pretty sure it's the bullet impacting the mouth of the case.
As others have mentioned, pretty sure it's the bullet impacting the mouth of the case.
Take out the felt stopper at the bottom of the bullet puller and cut it in half at a 45 deg angle. This will eliminate bounce back.
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