Quote:
Originally Posted by mikel
The post by Scalce reminded me of something that I read here, people seem to have good luck with AA1680 and Lil'Gun in both sub and super-sonic loads with the M1S AR.
Also, pay very close attention to this as you start to work up loads.
You may be a very experienced reloader and already know all of this, but someone else reading this thread may learn something.
On my M1S rifle I most definitely can get a bullet seated out far enough to get into the lands while still fitting in the mag. Did it, got the way over-pressured case to show for it...
A different bullet may not play out the same way, check your equipment and be careful.
Good luck and stay safe!
Mike
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Good point
It is not always the heavier bullets that can jam in the lands as the bullet profile is more important.
An example is my new barrel that can easily get 147 FMJs, 168/175 BTHPs, and 240 SMKs jammed into the lands at under mag length but the 208 Amax and 220 SMKs can be out to 2.6" and still not touch the throat.
I did get a chamber gauge cut from the guys who made my barrel which has been extremely useful in this regard.
You can always get a case that you know chambers and extracts correctly, cut 1 or 2 slits in the neck, clean up the burrs, and use that as a basic chamber measuring device.
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