Necking up brass

[cattleman99]

I am looking to neck some of my 6x47 Lapua back up to 6.5x47. Is there a good way to do this? I have necked down, but never up. Any help is appreciated.

 

[Supersubes]

Buy a mandrel die and the appropriate mandrel. Brownells/Sinclair sells them reasonably. There are others as well. Lube up your necks and mandrel, and go to town.

 

[mcfred]

I've made some "expander balls" for FL sizing dies that were a polished tapered pin for "necking up." You should probably anneal the necks afterward and beware the donut at the neck/shoulder junction. You might have to turn the necks afterward to eliminate the donut.

 

[cattleman99]

Buy a mandrel die and the appropriate mandrel. Brownells/Sinclair sells them reasonably. There are others as well. Lube up your necks and mandrel, and go to town.

This and the expander die should be all I need?

 

[cattleman99]

I've made some "expander balls" for FL sizing dies that were a polished tapered pin for "necking up." You should probably anneal the necks afterward and beware the donut at the neck/shoulder junction. You might have to turn the necks afterward to eliminate the donut.

Hoping I don’t have to turn necks, is there a way around that?

 

[mcfred]

Don't seat bullet heels past the NSJ?

Don't neck up very far? .019" diameter is not much. I'd give it a go.

It's not a problem until it's a problem.

 

[Supersubes]

View attachment 7141674

This and the expander die should be all I need?

Buy the “turning” mandrel. They’re .001 smaller than the “expander” and you can just load them after you neck them up.

 

[cattleman99]

Buy the “turning” mandrel. They’re .001 smaller than the “expander” and you can just load them after you neck them up.

They’re out of stock, guess I’ll order the expander in the meantime

 

[biffj]

You might find that annealing the cases prior to expanding the necks might get you crushed cases or inside out necks. Your mileage may vary of course but most I've seen have expanded then annealed. Its a shame to waste cases.

frank