AR10 Chamber Length Measurement

[Jigstick]

Forgive my ignorance. I know how to find my chamber length on my bolt guns...but not on my new SP10 in 6.5CM. I want to start handloading but need to figure out my OAL to the lands. Ive never done it on a semi auto. How to I go about figuring out my jam length / OAL? Or is it most likely that loading to magazine length will be be shorter than my jam length?

 

[Steel head]

You’ll probably be limited by magazine restrictions but it’s easy to find the throat on a gasser with the Hornandy tool or the not so precise but usable stick test.

 

[Jigstick]

link to hornady tool please?

 

[r.tenorio671]

link to hornady tool please?

...HYG, get the straight model, works better with AR15's and AR10's...

Lock‑N‑Load® O.A.L. Gauges & Modified Cases - Hornady Manufacturing, Inc

Lock-N-Load® O.A.L. Gauges Regulating seating depth and the resulting jump to the rifling is widely regarded as fundamental to improved accuracy. A few thousandths of an inch change between the bullet and the rifling can make the difference betw...

www.hornady.com

..you will also need a modified case to use with the tool, good luck!