S&B Brass....

[KyleC]

Anyone have issues seating primers?

I'm using an RCBS hand primer with a .223 shellholder.

Wolf SRM primers. They seat fine in everything but S&B

Ideas? Suggestions? They don't look like they have crimped primer pockets

[rb288]

Yes, they seem to have a small crimp.
Swage the pocket and they will seat fine.

[rlandry6]

I swage every piece of .223 brass and put a light chamfer around the pocket just for the occasional out of spec primer or pocket.

[KyleC]

I swage every piece of .223 brass and put a light chamfer around the pocket just for the occasional out of spec primer or pocket.

This is .300blk.

I ran a few through my super swage. NO change

I'm beginning to think I may have used the wrong shellholder. It's like the case head has been mashed down. The primers are high and/or deformed from the priming rod.

[rlandry6]

I swage every piece of .223 brass and put a light chamfer around the pocket just for the occasional out of spec primer or pocket.

This is .300blk.

The 300BlkOut is still based on the .223 case so the shell holder for .223 should work fine.

Seating on a press or a hand held tool? If on a press, what brand/model?
I would look at the alignment of the press and die adjustment.

[golfindia]

Never used s&b 300blk brass, but their primer pockets are tight in pretty much everything else.

[KyleC]

I swage every piece of .223 brass and put a light chamfer around the pocket just for the occasional out of spec primer or pocket.

This is .300blk.

The 300BlkOut is still based on the .223 case so the shell holder for .223 should work fine.

Seating on a press or a hand held tool? If on a press, what brand/model?
I would look at the alignment of the press and die adjustment.

RCBS Hand priming tool

[KyleC]

Never used s&b 300blk brass, but their primer pockets are tight in pretty much everything else.

Thanks, that's good to know.

However, I ran some through my super swage and nothing changed

[rlandry6]

S&B is on the list of "bad" brass because of excessive neck thickness. Unless you are going to turn the necks, I wouldn't waste a lot of time on it and move on to something more compatible.

[SwampDog_13]

S&B is on the list of "bad" brass because of excessive neck thickness. Unless you are going to turn the necks, I wouldn't waste a lot of time on it and move on to something more compatible.

Question... How could brass that carried a .308 diameter bullet and fired out of a blackout chamber all of a sudden develop neck thickness too thick to re use?

I'm thinking the S&B listed in the no good brass would have been .556 converted brass, not .300AAC head stamped stuff.