I'm wondering if I can make 25.06 cases out of some old .270 cases I have? I know I'll need to trim to the correct length but my question is the thickness of the neck wall. Will everything be ok?

Try a couple, I think it will work fine.

Other than needing to trim, you should be just fine.

I have formed many 25-06 from 270,with no problems. There is a lot to trim.

Thanks, Grum, Bobby, and Jason...Going to my gun room now.

By the way Jason, was the neck wall thickness any problem?

You won't gain much neck wall thickness in going from .277 ID to .257 ID. To the extent that you do, it will likely just fit the neck dimensions of your chamber a little better in that most chambers are somewhat oversized in the neck, anyway. The ultimate test is whether a bullet is a slip-fit in the mouth of a fired, unsized case. If not, then you'll need to thin the necks with a turning tool or an inside neck reamer.

If you don't have a power trimmer you will wish you did if you do very many.

quote:

Originally posted by bama7x57:
If you don't have a power trimmer you will wish you did if you do very many.

Bama.... dang I wish I had a power trimmer!! After about 10 rounds I said to myself, " FORGET THIS !!!"

Stonecreek... I am finding some VERY tight rounds after placing the bullet in the case. I smoked the case and it appears to be rubbing the neck right where it begins to shoulder. NOT the neck and NOT on the shoulder but where the two meet. Hope Im giving you a good discription of where its rubbing. I'd add a picture to show but I dont know how to add one to the post yet. :-(

But I have good news.. I have 50 rounds of new 25.06 virgin brass that came in yesterday so that makes me a happy camper.

Sounds like your FL die is just a tad longer than your chamber. I'm assuming that you have set your die to bump hard against the shellholder? If so, the cure is to grind a little off of the top of the shellholder, thus allowing the case to enter the FL die just a bit further to bump the shoulder back enough to chamber without excessive resistance.

quote:

Originally posted by bama7x57:
If you don't have a power trimmer you will wish you did if you do very many.

I converted my manual trimmer to power. I took off the bolt that holds the handle on. I took the bolt to the hardware store and bought a 3" bolt of he same size and threads, and a couple nuts.
I used the nuts as jamb nuts, and cut off the bolt head. My cordless drill powers it.


I never measured case thickness, but I have never had unexplained pressure problems with my 270 brass. I have used the same loads in 25-06 and 270 brass, but these are not max loads.

In my college days, LONG ago I necked down 270 and 25-06 brass both down to 6.5x55, ONE caliber, BOTH Hornady brand had a large difference in case capacity one more than the other.

YET, I had EXTREMELY dangerous pressures and almost had a potentially fatal problem. The striker came back hard enough (cock on close) during gas escape via primer and case head rupture. Lucky that firing pin piece held, ALTHOUGH the bolt body threads CRACKED.

Issue: OD on necks .310, specs called for .297 MAX.

Effect: Virtually crimping case during chambering, not allowing bullet to release under normal pressure. In other words, since brass was not widely available then, and I was not wanting to pay for Norma then, not sure if Lapua was around, and I was not as knowledgable then, I nearly put a hole through my head.

I personally happily neck up brass, on say the same parent case 30-06 to 338/06, etc, but if not properly tooled with neck turning equipment would be very careful to not do it, or at least mike the OD on the necks.

Better to spend a few dollars if need be but safety must be foremost to not have a near tragic mishap that I nearly did. That bolt body was replaced, and headspace checked, but I never trusted that '96 mauser and sold it. If the striker would have broker free, an eye lost and likely my life would have been the real cost.

Good luck and safe shooting.