Misfire help

[limbic]

I have a new to me 6BRX. I have had a large number of misfires for various reasons. I think I've finally gotten the fire forming misfire figured out. However I think I'm not seating my primers deep enough on my BRX brass. The primers are easy to seat in the virgin BR brass but difficult on the BRX. Is their a way to uniform or slightly expand the pocket. I'm using 7 1/2 BTW.

I can't think of any other reason for FF brass to misfire other than primer. The Stiller action doesn't have very many rounds throught it so I doubt it is the firing spring.

I'm open to other ideas as well.

As far as misfires while fireforming I don't think I had enought neck tension and the bullets were sliding back into the case when the primer was hit and the brass slid forward in the chamber.

 

[Travelor]

First, I am assuming (I know what that does) that you are speaking of misfires in already fire formed cases. If so, I see 3 possibilities.

First a weak firing pin spring (replace firing pin spring if you believe this could be the cause). My guess is that this is NOT the cause.

Second, bad primers (easy to check, just load some other primers).

And third, the primers are not seating and the firing pin "hit" is being cushioned. This will seem a little anal at first, but check your loaded ammo with the plunging end of a caliper and see if the primers are seated below the case base and to the same depth.

Personally, I think the primer seating is the culprit from your description and this should be the easiest to fix. I use a separate tool for seating primers and with it I can feel when the primer bottoms out. You might also consider a primer pocket uniforming tool - it is built like and end mill and uniforms the depth of the primer pockets, but not the diameter - I would not spend the money until I checked the three things above.

Good luck and Happy New Year!

George

 

[gunsandgunsmithing]

Start by using the false shoulder method of FF instead of relying on the bullet to stay put. Your FF problem is likely because of the firing pin driving the case forward and shoving the bullet into the neck and/or lands. Once you have that done, check your shoulder bump on this FF brass before and after sizing it. You should only be pushing the shoulder back .001-.002" at the most. If you still have a problem, call Jerry Stiller. It's not uncommon for this problem to occur, and Jerry will have a couple of things in mind to solve the problem. Check the FP protrusion and the FP fall length. Also look at the FP itself. Is the tip straight. Some were a bit soft and would bend near the tip, causing it to bind in the bolt. Primers are a possibility, but not likely to have mutiple bad primers. FWIW--Mike Ezell

 

[limbic]

Thanks for the replies. I strongly suspect the culprit is my reloading technique with a new caliber. I think the die was set up incorrectly (redding Comp series) and I was bumping the shoulder with the bushing by having the press "cam over center" if that makes sense. I know what it means and have felt it but cant explain it.

Reloading equipment is in the truck and I'm going to the range in the morning to work some stuff out.

 

[gunsandgunsmithing]

The Redding Competition dies are NOT meant to be cammed over. --Mike Ezell