Bumped shoulders too far

[Jimbee]

I have a Tikka barrel reamed to 6-284. Long story short, when I necked down 6.5-284 brass I pushed the shoulders back .012ish. I ruined some lapua brass in this latest reloading learning experience. I had a case separate and there's a telltale shiny ring on most of the other fired pieces. I have some unfired Norma brass that I necked down and bumped shoulders too far. Can I salvage it by jamming a bullet into the lands, or do I need to start over with new?

 

[WeiserBucks]

It could probably be salvaged with jammed bullets but I would only use that brass for range work and not risk a separation during a hunt.

 

[MontyMontana]

I agree with the above post... It can be salvaged but I would probably use a fire forming load to do it.

 

[waspocrew]

Jam it or make a false shoulder to headspace off.

For a false shoulder, you’d need to neck up the brass (.264 might work, but .277 would be better), then neck back down to 6mm.

When necking back down, do it in small increments until you can chamber the brass with a decent amount of resistance.

Here’s an example with my 6.5 Sherman

 

[Pickettpuncher]

I like the false shoulder better myself, but either way can be done.

 

[WeiserBucks]

The brass is already overworked, necking it up and back down for a false shoulder is just working it more. Jam and blast or throw it away.

 

[Colorado Cowboy]

You could anneal the brass and then use a light load to fire form the case.

If it were me, I would trash the brass and start over with new cases. Lessons learned.

 

[waspocrew]

The brass is already overworked, necking it up and back down for a false shoulder is just working it more. Jam and blast or throw it away.

Overworked because the unfired brass was sized once? Pretty simple to anneal if that’s the concern.

But also pretty simple to just trash it and start over with new brass.

 

[WeiserBucks]

Pretty simple to anneal if that’s the concern.

I don't anneal so I'm not concerned