Primers Popping Off Bullet Casings. Why?

someguy2800 · Sep 23, 2022

Way overpressure. Cratered primers, expanded case head, brass flowing into the ejector hole. Not safe to shoot.

jmorris · Sep 23, 2022

David Hoback said:
I don’t think it’s overpressure. The rounds with primers, they are only slightly flattened. The ejector stamping is present, but again, I’ve seen worse.

I think there was enough pressure there to extrude the brass case head into the hole for the ejector. If the primer existed any longer in the over pressure cases, they might also show signs of excess vs the other cases that have no extrusion marks on them and didn’t spit out the primers.

It wouldn’t surprise me if the cases on the right also wouldn’t hold a new primer, that’s another sign they sustained pressures in excess of what they could handle.

starnbar · Sep 23, 2022

First thing pull a couple rounds and weigh the charge if you get a significant difference that could be the problem I/E low powder charge or over fill charge

lightman · Sep 23, 2022

I would not shoot any more of those and I would call the manufacture.

Vern Humphrey · Sep 23, 2022

Oh, yeah! Look at the markings forced into the brass beside the primer pockets. This ammo is WAY too hot!

MR WICK · Sep 23, 2022

My brother decided to go shooting this morning. He has a Savage 10/110 elite. He took my ammo box with him thinking it was his. He is keeping his rifle and ammo in my safe while his wife redecorates their house. He shot 4 boxes with no problem.

How is that possible?

12Bravo20 · Sep 23, 2022

Either you found all of the bad rounds or he needs to go buy lottery tickets.

Random 8 · Sep 23, 2022

MR WICK said:
My brother decided to go shooting this morning. He has a Savage 10/110 elite. He took my ammo box with him thinking it was his. He is keeping his rifle and ammo in my safe while his wife redecorates their house. He shot 4 boxes with no problem.

How is that possible?

His rifle is different, or perhaps the particular 4 boxes he grabbed were different. Have you tried any other ammo in your rifle?

Either way, a thorough cleaning of your rifle is in order to eliminate the possibility of a fouling issue causing the problem. I would soak a .30 cal brush in either brake parts cleaner or starting fluid (both very effective carbon and grease solvents) and work over the first 10 or so inches of your bore. Follow this with a .45 caliber brush in the chamber area. Follow this with a tight fittiing "shotgun" patch in the chamber area, and a dry .30 cal patch through the bore.

MR WICK · Sep 23, 2022

Random 8 said:
His rifle is different, or perhaps the particular 4 boxes he grabbed were different. Have you tried any other ammo in your rifle?

Either way, a thorough cleaning of your rifle is in order to eliminate the possibility of a fouling issue causing the problem. I would soak a .30 cal brush in either brake parts cleaner or starting fluid (both very effective carbon and grease solvents) and work over the first 10 or so inches of your bore. Follow this with a .45 caliber brush in the chamber area. Follow this with a tight fittiing "shotgun" patch in the chamber area, and a dry .30 cal patch through the bore.

I shot some Hornady 168 today and everything seemed to be functioning fine. I cleaned the rifle using Shooters Lube and Cleaner before I went.

Primers Popping Off Bullet Casings. Why?

someguy2800

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jmorris

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starnbar

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lightman

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Vern Humphrey

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MR WICK

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12Bravo20

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Random 8

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MR WICK

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