Tools to measure AR-10 chamber and 308 brass for custom sizing?

[My Toy]

As opposed to just SB or FL sizing, how do you measure the chamber of an AR-10 and size your cases to a more precise dimension for more accuracy and greater longevity of brass?
What specific tools do you use?
Thanks.

 

[MJP68]

I use the SB dies, and check headspacing with the Hornady set..
as far as actual chamber measurements on your rifle, sorry I don't know
Are you having issues with your current reloads?

 

[ZombieMonkey]

Hornady Lock-N-Load Bullet Comparator Basic Set 6 Inserts

+ This

Hornady Cartridge Headspace Gage Bushing 400 Diameter

Measure your fired brass to determine your avg. length of fired cases and bump back the shoulders 0.003-0.004 for your semi. I personally bump everything for my semi autos back 0.003 and have never had issues.

You can use the bullet comparators to also better measure your seating depths more consistently.

 

[OF&B]

These are what I use the most

Hornady Lock-N-Load Overall Length Gage Bolt Action

Hornady Lock-N-Load Overall Length Gage Modified Case 308 Winchester

Hornady Lock-N-Load Headspace Gage 5 Bushing Set Comparator

 

[AIdog]

i use the digital headspace gauge its awesome also used to measure bullet ogive as well... Innovative Technologies - Reloading Equipment

 

[No1]

Measure the same as any other gun. Fired brass and headspace comparator. For AR10 I set my brass back .002-.003" with a Redding Type S FL bushing die. If you are loading to mag length then you will have a LARGE jump to the lands and you want the bullet to be as straight as possible for the launch. I sort ammo <.002" is for serious shooting and >.003" is for under 400 yds shooting.

 

[nobbie333actual]

if you want to measure your chamber you could use Cerrosafe
also if you want to keep your brass longer you could anneal brass

 

[ghostwriter247]

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