308 brass necked down to 284

[Stumps13]

Can 308 brass be necked downed to.284
I have just acquired a 7mm-08 REM and am wondering if 308 brass can be necked down to .284 ?
Can info would greatly appreciated.

Stumps 13

 

[thinckley]

Can 308 brass be necked downed to.284
I have just acquired a 7mm-08 REM and am wondering if 308 brass can be necked down to .284 ?
Can info would greatly appreciated.

Stumps 13

Since that is where the 7mm-08 came from... I would say it is a fair bet.

The 7mm-08 Remington is a rifle cartridge that is almost a direct copy of a wildcat cartridge developed around 1958 known as the 7mm/308. As these names would suggest, it is the .308 Winchester case necked down to accept 7 mm (.284) bullets with a small increase in case length.

 

[krw]

i would resize one. Meas the OD of the neck, seat a bullet and meas neck diam again.

 

[Mobuck]

I used to make 243 from 308 but it took two sizing steps, neck reaming, and some required annealing. I'd go directly to 7mm08 with just normal trim to length.

 

[BULL'S-EYE]

I'm not getting it.
Quality 7-08 brass is inexpensive, and available in abundance...Why not just purchase some new?

 

[contender]

Maybe the OP has a quantity of .308 brass???????

I make 7x30 waters brass from 30-30 cases. I've made .243 Win cases from .308 cases.

I do believe you can easily make 7mm/08 brass from .308 brass.

 

[s4s4u]

It is only .62mm of reduction. I doubt there will be any need for neck reaming, but that may depend on the 308 brass.

 

[recumbent]

Yes it can, I did it when I had a 7-08. Trim it, then Anneal the brass first then size it in a 7-08 die.