Finding bullet specific coal

[Pholley526]

I am looking for suggestions on finding coal for specific bullets in a semi automatic. For a bolt gun I just back out my sizing die 3 or so turns to where it just barely holds the bullet and then load it in the chamber, then extract and measure. How would I go about doing this with a gas gun, ar10 specifically...

 

[1006]

You will probably be fine if you load them to max magazine length, and see if they will chamber.

 

[kuduman]

Yeah, that's the simple answer. You aren't going to hit the lands at magazine length, unless you intentionally ordered a single-shot match barrel.

But buying the tool is always the best answer. The Hornady Lock-n-Load tool works great. Then you will know for sure.

 

[Pholley526]

Thanks, just had me wondering because my coal in my 25:06 is shorter than what is listed in Lyman book as well as nosler website with that specific bullet. Thanks for the input!

 

[jeep78]

Here are several methods from Brownells:


https://www.sinclairintl.com/guntech/determining-bullet-seating-depth-/detail.htm?lid=16131

 

[Pholley526]

Here are several methods from Brownells:


https://www.sinclairintl.com/guntech/determining-bullet-seating-depth-/detail.htm?lid=16131

Good link there

 

[jglenn]

I've used the Sinclair tool for years with excellent results..