7.92x57 to .270?

[JD17]

Howdy folks,
I'm new to this forum, but have heard great things about it. I've been playing around with reloading lately and have developed a curiosity for wild cat cartridges and the like. I was curious if anyone has not converted, but necked down an 8mm Mauser case to accept a .270 bullet? If so how, and what were the results. Also if I am completely off my rocker and just finna blow myself up please let me know[smilie=1:.
Thanks in advance -Josh

[waksupi]

Can't say as how you are crazy, but with cast boolits, it would be better to neck up, than to neck down.

Welcome aboard.

[Wayne Smith]

Don't know if it's been done, but try researching 6.8x57mm. Wouldn't surprise me if the Europeans have done it.

[JD17]

That's understandable, This is more on the side of just figuring out how to do it than for casting. I want to build a high speed low drag Mauser with a more unique cartridge. But I'm just not sure how to go about the re sizing of the cases, etc.

[JD17]

Ah there it is Chinese and Portuguese 6.8x57 Thanks for the tip!!

[runfiverun]

there is also a 7.5x57 a 6.5x57 a 6x57 a 5.5x57 a 9.3 and 9.5x57 and a 10x57.
the 6.5x257 is the most low drag of the bunch and the 5.5 is the most high speed.

[UBER7MM]

In the long run, I'd believe you'd be happer with a 7x57 Mauser cartridge or a 270 Win cartridge. The dies for a wildcat will be expensive. Moveover, there won't be that much difference between a 6.8x57 and a 7x57.

Its the old 270 Win vs. 280 Rem argument all over again, in a slightly shorter case. (The advantage of a 270 Win over the 280 Rem is that the ammo can be purchased anywhere in the USA. 280 and 7x57 ammo and brass is harder to find. The advange of the 280 Rem over 270 Win is that there are more 7mm bullets to select from if one reloads.) You'd be going full customization of each case with a 6.8x57.

Before you sink a lot of money in rebarreling or customizing a rifle and reloading equipment, try forming a few cases from one caliber from another. 8x57 to a 7x57 or 30'06 to 270 Win or whatever you have. It'll give you an idea of the work that's involved, and the tools you'd need.

I hope that helps,

[eljefeoz]

"...In the long run, I'd believe you'd be happer with a 7x57 Mauser cartridge
Before you sink a lot of money in rebarreling or customizing a rifle and reloading equipment, try forming a few cases from one caliber from another. 8x57 to a 7x57 or 30'06 to 270 Win or whatever you have. It'll give you an idea of the work that's involved, and the tools you'd need.

I hope that helps,

He said it

[bob208]

if you are just looking at using old brass. the 8mm is too short to make .270. but as others have said the wildcats are covered by the commercial cal. now.

[Hardcast416taylor]

So, what is wrong with just leaving the rifle in 8mm? If "J" bullets are to be used you can get down to 125 gr. My personal favorite is the Nosler Ballistic tip in 180 gr. that I drive at near`06 velocities out of my K98.Robert

[UBER7MM]

So, what is wrong with just leaving the rifle in 8mm? If "J" bullets are to be used you can get down to 125 gr. My personal favorite is the Nosler Ballistic tip in 180 gr. that I drive at near`06 velocities out of my K98.Robert

The 150 gain "J"-words in a 8x57 is nothing to snear at. It's a great cartridge with cast boolits too.

Shoot the barrel out before you rebarrel to a wildcat.

Good reloading, shooting,