375 Cheyac build (barrel bore diameter and twist?)

[Crosshairs6]

I have read alot of information regarding the Cheytac and barrel specs. I am waiting on my XLR Stock to drop in a Stillers TAC 408 action to chamber a .375 Cheytac. I already have the 5.5-22X Nightforce NXS scope.
I will be shooting 350 Jamison Solids and 350 Grain Sierra Match King projectiles. I plan to shoot 2000 yards.
I am leaning towards a 32 inch barrel with a screw-on muzzle brake. I see the barrel cut 6R with a 1-10 twist, .369 bore and .375 groove. I read to specs of the Lost River Bore from Lawton and from what I read from other shooters here, it is recommended to go with a different bore diameter because the Lost River bore is too tight and the twist is at a 11.5.

If someone here has an educated opinion or better yet, specific experiance with the caliber, I would certainly like to hear a recommendation for a specific barrel for this rifle.

I am open to any recommendations on the build. I WILL stay with the .408/.375 Cheytac caliber. Thanks for any information posted.

 

[steve123]

Re: 375 Cheyac build (barrel bore diameter and twist?)

The Jamison 350's work great at ELR distances out of my 11.5 twist LRB 375CT.2500Y is no problemo.Don't do your load development closer than 300Y with them.I found 400Y to be good.The 350 Sierra's didn't shoot worth a darn in my friends or my 375.YMMV

It's still up in the air as to what the best twist is for which new supper high BC projectile design.I've already waited 3 years for the smart bullet maker dudes to come up with anything better than good ole 350 Jamisons.

 

[pyrofx]

Re: 375 Cheyac build (barrel bore diameter and twist?)

Steve , since I own the M.K.'s now , what is not worth a darn?

greg

 

[Crosshairs6]

Re: 375 Cheyac build (barrel bore diameter and twist?)

Is there another barrel maker that produces a barrel chambered in 375 Cheytac? Lawton is not an option.

 

[steve123]

Re: 375 Cheyac build (barrel bore diameter and twist?)

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Pyrofx</div><div class="ubbcode-body">Steve , since I own the M.K.'s now , what is not worth a darn?

greg
</div></div>

It's been so long I can't remember how they shot for you??? Some guys report them working great and some don't and that's with the same Lawton spec LRB barrels BTW.That's what the YMMV was included for

 

[Cinch]

Re: 375 Cheyac build (barrel bore diameter and twist?)

Mine is a 10 twist Lilja and shoots the 350 SMKs great.

 

[bcpdshooter]

Re: 375 Cheyac build (barrel bore diameter and twist?)

Lawton is having major internal issues right now.
If it were me I would contact pacific tool & guage for tooling. Unless you live close to Lawton and you had the time to stay on top of them.

 

[Jimmym40a2]

Re: 375 Cheyac build (barrel bore diameter and twist?)

Cinch how does your barrel do with solids?

 

[Crosshairs6]

Re: 375 Cheyac build (barrel bore diameter and twist?)

Cinch,
What is the bore diameter and groove diameter of your 375 CT Barrel?

 

[Cinch]

Re: 375 Cheyac build (barrel bore diameter and twist?)

I have only shot the SMKs in it. I don't know the bore dimensions. I will try to find out and let you know...

 

[Crosshairs6]

Re: 375 Cheyac build (barrel bore diameter and twist?)

Thanks Cinch. I look forward to hearing from you.

 

[Cinch]

Re: 375 Cheyac build (barrel bore diameter and twist?)

Got an email sent to Dan Lilja. I'll let you know.

 

[RWSGunsmithing]

Re: 375 Cheyac build (barrel bore diameter and twist?)

I've been using Benchmark barrels for both lrb and std bore builds and Brux barrels if you wanting a std bore dimesion.

 

[Cinch]

Re: 375 Cheyac build (barrel bore diameter and twist?)

Here is what Dan said my barrel is. .375 x .367

 

[Crosshairs6]

Re: 375 Cheyac build (barrel bore diameter and twist?)

Thanks Cinch....