Chambering a Pinbuster

[howelljeffrey]

I just got some mbc pinbusters and am not having much luck chambering a dummy round in my SA 1911 A1 barrel. I started out long and worked my way down to 1.200 and it still won't chamber. It stops right at the front of the rim and won't sit flush. With the barrel installed the gun will not go into battery. LFC die didn't improve seating. Everything looks good and smooth but the bullet just seems too big up front. Has anyone had better luck in a 1911?

 

[idahoglock36]

Mine are at 1.195 right to the top of the crimp grove. Not using a 1911 though.

Are you having problems with seating the round with the barrel out using it like a gauge? If not is the action not closing all the way when you release the slide?

I would try a couple of things, with the dummy round. Pull the barrel and seat the round at 1.2 all the way in....see where it is hanging up. I don't know the if there is a term for this or not but barely size like 1/2 the way of a case...bell it completely put a pinbuster in and seat, put in barrel and seat all the way...pull round and measure...just make sure there are no marks on the front of the bullet that could indicate it got stuck and partially pulled out of the case when you were extracting, which would mess up your measurement. You might make a dummy to 1.15 and see if it will chamber. Don't know if I would go this short or not with this heavy bullet, but it is a 1911. Also, have you been successful with any other lead rnfp bullets regardless of weight in this 1911?

I'm baffled if the LFC didn't help in the troubleshooting, usually they will iron things out.

Good luck, I really like this bullet for pins.

 

[howelljeffrey]

Thanks Idaho. I'm using the barrel out of the gun as a guage and with it in the gun. When you say seat it all the way in do you mean to gently force it in to chamber? The only other bullet I have used in this gun is the swc and factory stuff. I was afraid of compacting the load going any shorter in oal but maybe with 45 it's okay to go a scootch shorter?

 

[Walkalong]

Try this method to see how long an O.A.L. your barrel will accept with a round loaded round with that bullet.

 

[Robert Palermo /Penn Bullets]

If the issue doesn't resolve itself thru O.A.L. adjustments then the bullet and or crimp could be oversize for the chamber.
Make sure the chamber area is clean and the taper crimp is set at .469 at the mouth of the case.
If this still doesn't do it you may need to go to .451 diameter bullets.