Weird Deformed brass

[30BR]

May have oversized the case? Too much headspace to seal with a slow burn?

 

[Dmagna]

I dunno, it's the one and only time it has happened. Maybe I messed something up. Oh well, thanks for all the help

 

[mugadutz]

my 7mag has done this a lot what they are saying about the gas is correct
brass is to hard i annealled my brass problem solved

 

[LoneTraveler]

A low powder charge.
Another possibility, Either a bad primer or primer not hot enough to ignite the charge completely.
I seen cases like that when the 264 Win. came out and no loading data around yet.
They was using the old Military Surplus Hodgdon 4831 powder in low charges for case size.

 

[Savage 22-243 AI]

My 22-243 AI. Did the same thing when I went from a 9 twist to 8 twist barrel and used a slower burning powder. 4831sc at 44 grains with 80 gr. A-Max bullet. Went to mag primers and that helped. Double checked powder weight but still had a few dents. Annealed the brass and problem solved.

 

[arch408]

Check your load data. You might need a magnum primer. Federal magnum are supposed to be the hottest. Also use a faster powder as long as it's recommended for your cartridge. Do not try a duplex load with a little of fast burning powder next to the primer to initiate ignition. That can be very dangerous.

 

[338 dude]

I've always heard that as a general rule of thumb when using 60 grains of powder or more is when you would need a magnum primer

 

[WildBillG]

This has happened to me twice in a couple of weeks. I think my problem is my old Weatherby bras is worn out. As the head seperated too. Could this cause the low pressure and dent as well.

 

[jimbires]

This has happened to me twice in a couple of weeks. I think my problem is my old Weatherby bras is worn out. As the head seperated too. Could this cause the low pressure and dent as well.

if you had a head separation that is definitely the cause of your dents

 

[WildBillG]

Good from what I read here that is what I thought.

 

[Shawn Carlock]

I have had this happen twice, on both occasions it was a brass issue and simply changing brass cured it. They were full power charges and getting a new lot of brass made it go away both times. We went through the the same progression of thoughts as above with no results or cures. One rifle was a 7 RUM and the other was a 338 Edge using Remington brass.