ejection problem(solved)

[A and O]

Your leaving a cold round in a hot chamber... Then your allowing it to cool down and shrink while the brass is also expanding.... Not a loading issue...


Just dont leave a live round in the chamber... Also that should be rule #1 in gun safety

I believe what Tiller stated is the answer.

Under most chamber conditions it probably would not pose an issue. This is why SMALL BASE DIES are being made for AR chambers.

If it it does not fit, you must acquit. Musta quit using a small base die that is.

[armyguy209]

Well I figured out what my problem is now. I don't know why but I did not throw the completed rounds into the case gauge, which I have always done in the past. I figured out exactly what my problem is, however I don't know what is causing it. I am wondering if it has something to do with the Redding competition bullet seating die. The case neck is getting smashed. It is hard to tell from just looking at the rounds, but when you feel it and look hard you can see it. There is a little buldge right at the case neck. I am going to have to pull quite a few rounds...

They are shooting fine, but now that I know I have a problem, I am not going to shoot them. I don't think it is safe or good for the rifle. What do you guys think is causing it? Also, is the brass ruined now?

[armyguy209]

Back off crimp , shoot it for a awhile. If you still have a problem small base size.

Ding Ding! I think we have a winner. I went outside right now to mess with it a little. Somehow my redding die got knocked out of setting when I took the toolhead off the other day. I got it back to where I want the bullet to sit and seated a few more bullets. I then checked them and they didnt have the bulge after seating. Then I reset my crimp die(which I should have tried first before resetting). I put a very light crimp on it. All I did was screwed it down until it touched the shell plate and that was it. I didn't give it the extra 1/8-1/4 turn. I tried pushing the bullet into the wood bench and the bullet wouldnt push in, it doesnt even really push in after just coming out of the seating die. Then I case gauged the completed round and it case gauged just fine.

If the crimp die is set too tight, can it push down and bulge the case? If so, I think that is the culprit.

[J-cat]

The neck and shoulder are very soft in comparison to the case body. If you overcrimp the case mouth will bottom out against the bullet shank and the force will have to go somewhere. So the neck and shoulder collapse, increasing in diameter like an accordion. Since you are work inv with tight clearances, the round wedges into the chamber. When you fire the round, the case reforms itself to conform to the chamber.

[armyguy209]

The neck and shoulder are very soft in comparison to the case body. If you overcrimp the case mouth will bottom out against the bullet shank and the force will have to go somewhere. So the neck and shoulder collapse, increasing in diameter like an accordion. Since you are work inv with tight clearances, the round wedges into the chamber. When you fire the round, the case reforms itself to conform to the chamber.

So are these safe to shoot then or no? When I shoot them does it reform the brass back to normal? I have shot probably 2-300 of them so far with no issues other than having to pull hard on the charging handle to eject the live round. The groups are still MOA at 100 yards.

[J-cat]

They are safe. They will fireform to the chamber. Take note for future reference though, if the case is too large at the casehead and it sticks, it will really get stuck when you fire it.

[armyguy209]

They are safe. They will fireform to the chamber. Take note for future reference though, if the case is too large at the casehead and it sticks, it will really get stuck when you fire it.

Thank you. Meant to say Ding Ding to you. You hit the nail on the head. Thanks for the help guys.

I just ordered the Innovative technologies digital headspace gauge by Larry Willis. I will use it to get the exact headspacing for when prepping all the rest of my brass. I don't know why but the more I reload and learn, the closer I keep getting to making match ammo. It is an addiction..a very costly one..lol

[mark501w]

I don't crimp box mag ammo as long as the slugs don't move.