Like what Danny has said. I've run the 150sst with 44gr of 2206h in my finnlight on the weekend, it shot a few 3 shot groups under 1/2 and a few just under Moa with good speeds of 2750fps. Also tried the 168amax with 45gr of 2206h and had the same results. So I'm happy with that. But speeds with the 168 was around 2780fps. If that powder isn't working for you try 2208 but some loads will be compressed at 45. But you will get a little room seating the round out at 2.900 o.a.l
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