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Ok here is my updates. Measured Gas port and it's .110. I checked and rechecked my gas block alignment...it's good. I picked up Alliant 2400 powder. It will not cycle it. I ran 10 grains of 2400 and it yielded me 1300FPS avg....without BHO or cycling. Does that seem weird to anyone?
So basically I have used A1680 and it works, but blows my ear drums up. 4227, 2400, H110 all will not BHO or cycle the gun at Subsonic velocities. I have not purchased N110 yet. It is going to cost me a shit load since I have to order it and pay hazmat. Plus I am thinking if none of these other powders are GTG it will not be either.
My loads are all 2.15" COAL, remington 7.5 primers and Forester Die made brass.
I tried a little lighter bolt and that did not make a difference. Should I try a lighter buffer spring? If so which one and where would I get it? Should I abandon TP555's gas black and go to a JP or PRI adjustable?
Any other ideas.....???
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