Re: lr308 and JP adjustable gas block?
I just put a PRI low pro adjustable on my Armalite 300 SAUM with 210 Berger VLDs. Closed it as far as I could and it still had enough gas squeek by to cycle perfect.
Remarkable how much recoil it sucked up. Tested one shot backing out the screw 1/2 turn and it was enough recoil that I didn't want to ever shoot it that way again, comparatively speaking.