.260 REM Brass from .243 or 7/08

[tabs4u]

Hi Guys,

I just recently purchased a .260 REM and do not like to use Remington brass, what is the easier process to create .260 rem brass from either .243 or 7/08 that give more consistancy in the necks after re-sizing I do not want them to be to short.

 

[Lefty Dick]

Just run it through the FL die and voila.
The only hitch I could see is if you have a tight chamber.
You might and only might have a bit of trouble when necking say 308 brass down if you have a tight chamber, but not to likely to occur in a production rifle.
And you may find your cases a bit shorter than spec, but dont sweat that either.

 

[lejarretnoir]

Go with Win .243 brass. It's the easiest way just to expand the neck first. You'll end up with with the proper length enough to trim.

I've tried with .308 cases and it ends up too short.

 

[todbartell]

go with 243, Lapua makes it

 

[martinbns]

FWIW, I have had great results with two different 260's and several different bags of RP brass. I find it more consistent than WW brass. I genereally start with RP brass in all my rifles.

 

[tabs4u]

thnaks for the info, I might try both when I start my load development

 

[prosper]

What's wrong with being a few thou short? Saves you from having to trim it as soon.

I'd form from .308 brass. If it's a SAAMI chamber, then it's probably got fairly generous neck dimensions anyway, and might benefit from slightly thicker necks. This works great for my 243 - run a .308 into a 243 FL die, load and fireform, and then go with Collet dies.

 

[Oscar Makonka]

I make my 7-08, 260, and 243 brass from 308 cases.

 

[shotgunjoe]

Federal also makes .260 brass,finding it may be difficult.You might consider buying loaded ammo and pulling bullets or unloading them the fun way.

 

[bisonhd]

I use 308's and it seem's OK. If I had to buy new brass, I'd buy 260 brass first , then 243 would be my second choice.

The 308 brass I am using is bt Norma. apparently this is better brass and I'm not sure if it is anymore workable than say RP. I simply necksize, after firing a lose bullet will easily slip into the case mouth.

 

[223Rem]

I make my 7-08, 260, and 243 brass from 308 cases.

.308 to .243....really? Do you have to ream the necks?

I prefer to neck up thick walled brass if at all possible.

 

[rmkm70]

i have access to a good supply of free once fired 308 brass, but i shoot two 243's. i just shove the 308 brass into the FL 243 die. fire form and trim necks true.

neck wall thickness is consistant and within sammi specs, but case length ends up .010 under trim to length. i don't know if ths it the proper process, but the brass shoots .2's in my factory M70. factory 243 win brass only gives me .3's

the 308 was the parent case of the 260, so why not use it.

 

[Oscar Makonka]

.308 to .243....really? Do you have to ream the necks?

It's always necessary to check when sizing from one case to another. I've never had to neck turn when used in factory sammi dimensioned chambers. Sammi spec neck diameter for the 243 is .276". 308 brass necked down will come out around .270" -.272" giving .004"+ clearance depending on the original brass neck thickness.