Custom Build - Barrel Throats for 7mm 140 grain bullets

[Jerry D]

So I'm posting again, slowly taking advice and deciding on components and specs for my rifle... it is my first rifle so I'm taking things easy and asking lots of questions as I want it to be PERFECT!!

Anyhow its going to be a 7mm-08 for use up to 500 yards max on deer/antelope etc... Normal shots will be probably 200 or less but I'm going to take it out farther on paper and if the time comes around when I need to take one, I'll be able to.

My plan is to use 140 grain hunting bullets in a 1 in 9.5" twist with a 20" barrel. Bullet selection will be 140 grain accubonds/partitions/tsx...

Do I need to specify a throat dimension? How does one measure throat dimensions required for specific bullets? I understand its the distance from the tip of the chambered brass to the where the rifling starts - basically the portion of the barrel where the bullet sticks out.

Also do I need to specify any type of special chamber for a 7mm08 or is it standard. I assume there are no variations like there are in some bench rest chambers due to different brass being used.

 

[Coyboy]

Jerry, reamers can be made anywhere within sammi spec, with different length leads and neck dia. It really depends on what your after as far as user friendly.

I would load a dummie round to the length that you would like it and send it to your smith. If you want tighter tolerances ask for a match reamer with a no turn neck, throated for your dummies oal. This will get you a nice fit.

It might be to tight if you run in dusty sandy locations and don't keep your rifle clean.