7x57 small ring take off

[Wolfer]

I'm wanting to build one of my Turks into a 34-60. Jess tells me 338 won't always clean up an 8mm.
I would like to find a cheap 7x57 takeoff that was at least .600+ at 22"

Anybody on here got one they'd part with?

Thanks, Woody

[leadman]

Did you check Midway for a barrel?

[Wolfer]

Did you check Midway for a barrel?

Yes, and everywhere else that I can think of. These Turks are a large ring 98 action with small ring threads. Caliber selection is very low in short chambered, pre threaded, small ring barrels. That's not my biggest problem.
All the 338 barrels I find are 10" twist. I want something slower, 14" perhaps. As I see it my only option is to bore an existing barrel.
I have a call in to ERShaw about a 35 rem barrel. That's probably the way I'll go unless I could find a take off.

As a side question, does anyone know the diameter of a 7x57 at the muzzle?

[UBER7MM]

Wolfer,

I don't know if the following answers your questions:

I read an article a few years back. It claimed that military barrels are tuff to bore out because of the quality of the steel can be an issue.
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7mm barrel exterior diameters will vary as does barrel profile and tapper. A new American 7mm groove diameter at muzzle should be .284" and bore .277" give or take .0005" or so. Here is a chart of Midway's barrel profiles by brand. I haven't seen Adams & Bennett listed for sale from Midway for a couple of years now. In their place are Green Mountain barrels which uses the same nomenclature:
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http://www.midwayusa.com/general.mvc/index/appcharts~barrel-blank-dimensions
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As far as a slow twist barrel at a reasonable price, your best bet is to go with a .358" barrel (358 Win or 35 Whelan 1:14, I believe.). Those calibers have the same rim diameter as the 8x57 so work on the bolt. You'll still need a series II small ring (1 1/4") barrel. That may be a challenge to find.
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7x57 is a great cartridge and is a quick change for 8x57; the magazine, action length and bolt are good to go. 1:10" is the slowest twist I've seen in 7mm for sale without going to special order. 9, 9.5, 10 are common twists for .284" barrels
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I hope this helps,

[Wolfer]

Jess talked like he had no problem boring the military barrel to 35 cal. My favorite rifle to hunt with is one of these with an Adams & Bennett 7x57 F-14 barrel on it. I'm wanting to build one just like it in a more cast friendly caliber.
If I bored a F-14 barrel to 338 it would leave sidewalls at the muzzle of .105 as the barrel is .548
I would like a little more metal than that. My 8mm barrels are .690 on the last step. I was hoping someone on here could tell me if the 7mm was the same outside dimension.

[nekshot]

wolfer I wish I knew your need 6 month ago. I have one but been cutting pieces off of it. The last step is .692 on mine.

[Wolfer]

Nekshot
Good to know the 7mm is the same size. This whole idea is probably just boredom.

[UBER7MM]

Wolfer,
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The F-14 barrel in 7mm is .550" at the muzzle. Probably too small for your plans with .338". The F-14 makes a nice light handling rifle with that 21" barrel.
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Safe shooting, safe reloading, safe shooting,