Case Mouth Getting Dented

[ZacharyR]

I’m having trouble with my .204 case mouths getting partially smashed. I have the gas adjusted so the bolt locks back on the last round and it feeds and cycles properly. I’m just wondering if it’s just part of having a semi automatic or if there’s something I can polish or adjust. I’m afraid it’s going to shorten my brass life considerably as I reload. Otherwise I’m not too concerned. I’d appreciate any advice.

The gun has a Stag lower with an upper that Dan Carey built me years ago.

 

[Im2bent]

You can buy something like this or just stick a bit of the soft velcro on the deflector

Deflector Brake Home

The Deflector Brake from HAVOC Tactical LLC saves brass for re-loading protects rifle paint/coatings, prevents brass burns, and piles brass up right next to you. Save Your Brass While Keeping The Range Safe: Reloaders and Left-Handed Shooters Ultimate Shooting Range Accessory. Fits Most Mil-Spec...

www.deflectorbrake.com

 

[ZacharyR]

I didn’t think about it being from hitting the deflector. I have some soft velcro I’ll have to experiment. Thanks

 

[supercorndogs]

I would suspect the case mouths are not hitting the shell deflector but maybe they are. Either way, it won't effect anything. Your sizing die will round them back out when you reload them.

I have seen Bolt actions do that to, where the brass was pushing against the inside of the action or chamber under the pressure of the ejector.

 

[LRShooter101]

Per the comment above, frequently happens when it strikes the shell deflector. If the Velcro doesn't help, you can try some stick on/self adhesive foam. You can increase the thickness of the foam until the dents are significantly reduced or eliminated.

 

[ZacharyR]

I appreciate the advice and ideas. I’m not worried about getting it round again I would just like to not work the brass a lot more than necessary if possible.

 

[DCC83501]

this is exactly what has worked for me.

 

[Bantam1]

My 6ARC dents the case mouths and I added one of those adhesive foam pads like the link above. It stopped the problem completely. It was a small flat spot but this solved it.

 

[db2000]

I use the deflector brakes also. Work great. Clean off with alcohol pad very well so oil/lube is completely gone first.