I am new to the gassers, I bought a used one from a member here on the Hide. I will be testing it out with my hand loads (for my bolt gun I sold here as well) and some FGGM 168's. The rifle is a 16" Ranier Arms Ultra Match, the gas block is a Seekins. My load is as follows, 175 SMK's, 43 gr, Lapua brass, CCI BR primers. I have been doing much reading about what members are shooting though this type of bbl. most seem to be using 168's. I will shoot both to see what it likes best as the gas block is adjusted now. Is there a short cut to tuning the gas block, or is it just shoot, adjust a little each way and see where they hit with each load and the rifle cycles? Is there a starting point on adjustment for the screw? I've never owned a adjustable gas block as you can tell. Thanks.