Gunsmithing School me on .308 match chambers

[Flyingbullseye]

I'm looking at doing a possible new build and can only find little information about .308 match chambers. I can't find dimensions anywhere. I'm somewhat familiar with the Beasly match as its on my current build but well just because I kind of want to use a different one because I can. Depending on the lot I use (175smk) the max COAL I can go is 2.90(+).

What other .308 match chambers are out there and how do they compare length and diameter wise (brass body and neck) to the beasly? Which ones are longer or shorter than my current one?
Any to completely avoid if shooting the 175smk?

Flyingbullseye

 

[Rthur]

Re: School me on .308 match chambers

I would suggest contacting Dave Kiff at Pacific Tool and Gauge.

 

[sinister]

Re: School me on .308 match chambers

The Bisley chamber was originally specified by the British for Commonwealth Palma-style rifle matches. My understanding is the English can be licensed to own a gun (and ammo for it) as long as they show need and a history of actually using it. The Bisley chamber came about because the British NRA issued surplus (or purpose-loaded for Bisley Matches) 7.62mm Radway Green military ammo, and to get the best accuracy out of it (or from handloads loaded long) the round could be up to 2.98 inches (singly loaded) long without creating excess chamber pressure.

US Match chambers usually vary in the length of the leade (determining the actual contact with the bullet ogive and free-bore jump) -- the two most common being for the 168 Sierra Match King and the other for the 175 and 155 (2155) Sierra Match Kings.

 

[tstevens]

Re: School me on .308 match chambers

Hopefully some more will chime in here. I've been wondering about this myself.

 

[tstevens]

Re: School me on .308 match chambers

Do the 175 and 168 MatchKings have a different ogive shape?

 

[BradfromND]

Re: School me on .308 match chambers

Here's a discussion from here about a month back. It is mainly about FTR chambers but it might be a little helpful for you.

http://www.snipershide.com/forum/ubbthreads.php?ubb=showflat&Number=3490061#Post3490061

 

[LRI]

Re: School me on .308 match chambers

We chamber ALOT of 308s. In 99% of them we use the M118 Special Ball reamer. It works with just about everything loaded to the 2.800' COAL length that's needed for M700 length receivers/magazine boxes.

Bisley reamers can work too.