I prefer H335 in my AR (16" M4), but don't have the big flash you are talking about by any stretch.
One thing to look at is the quality of your flash hider. If you have the milspec bird cage, those don't hide flash all that well - especially compared to some more modern and better designs.
I can't remember my load right off the top of my head, but I"m also shooting 62 grain projectiles, so that may have something to do with it. I prefer Varget in my bolt action and it produces no flash at all out of 22" barrel.
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