I've run a Hybrid .46, Omega 9K and Omega 300 on my 8" .300 blk. This was all in front of subsonic handloads; 220gr pills under 1000 fps. To my ears, they were all about the same. Haven't had the pistol for very long so timing and gas system adjustments might have an effect. Not sure; haven't tried. I'd give the nod to the 9K just for size advantage, even with the tri-lug adapter.
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~Mark
NRA Benefactor 2018
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