Sierra MatchKing Competition Ammunition 223 - primer pocket size atypical- has ring inside pocket?

[Clay]

Want to reload 223 cases. Spent primer measures .170, appears to be surrounded by metal ring in the primer pocket to fit. Regular.175 primer does not fit. What’s going on? Don’t know if ring is removable. Pictures attached. Thanks in advance.

 

[whistlersmother]

Look like primer pocket crimps.

If so, you'll need a tool to ream out the crimp.

 

[outrider58]

Look like primer pocket crimps.

If so, you'll need a tool to ream out the crimp.

Yup. Military crimp. If you don't have a swaging tool, you can use a chamfer tool(the inside end) and grind it off manually. It's slow, but it works if that's your only option.

 

[John from MD]

Yup. Military crimp. If you don't have a swaging tool, you can use a chamfer tool(the inside end) and grind it off manually. It's slow, but it works if that's your only option.

About 4 turns of the chamfer tool will take enough off so that the primer will go in.

 

[Clay]

Thanks for the quick replies. Good to know.

 

[teratos]

I love my Dillon Super Swage

Amazon product ASIN B00LAEVPZE

 

[erwos]

I love my Dillon Super Swage

Amazon product ASIN B00LAEVPZE

I like mine, but it's a bit of a bear for mixed brass. On-press swage tended to be a little easier to use.

 

[4g64loser]

I quite swaging.

My buddy showed me a slick trick. Put a .50bmg chamfer tool in a 5c collet in the milling machine, grab a handful of cases, just barely touch each pocket to the tool at about 400 to 500 rpm. Haven't had a deformed case head or bent rim since.

 

[Bountied]

Get some new brass.

 

[Clay]

Get some new brass.

Lol. Good point. With reloading it really is a question of how much to invest in time and tools v buying a product. Wouldn’t surprise me if there are people who machine their own brass from stock (I’m going to Google this now)

 

[4g64loser]

Lol. Good point. With reloading it really is a question of how much to invest in time and tools v buying a product. Wouldn’t surprise me if there are people who machine their own brass from stock (I’m going to Google this now)

They do but not for the type of cases you are probably thinking about.

Know one guy who turned his own 8 bore cases to match the Holland double he bought.

Another makes them for his 37mm Hotchkiss mountain gun.

 

[teratos]

I quite swaging.

My buddy showed me a slick trick. Put a .50bmg chamfer tool in a 5c collet in the milling machine, grab a handful of cases, just barely touch each pocket to the tool at about 400 to 500 rpm. Haven't had a deformed case head or bent rim since.

Huh. Thanks!!!

 

[4g64loser]

Huh. Thanks!!!

Well, he does happen to have all the shit to load 50bmg and 20mm, plus a milling machine with collets so, why not.

It's probably not the safest thing but he and I are used to working around machine tools and it works really well. The Dillon super swage sits in a box somewhere unused.