So I took the valve stem down to .090 and am running 36 gr at 989fps now and my hammer weight is only a 1/2 gram heavier I'm happy with that I'll have to shoot it and see if that is another accuracy node hopefully
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54 grain at 1040fps...I've done the same to a dynamic and used a impact tungsten hammer on it and it pushing 30 cal 54 gr slugs at 1040 ish faster if wanted but it's not needed it is definitely easier on the drs to change out a hammer weight tungsten hammer is about 2 grams heavier than the stock hammer
What do have your reg pressure set at ?Well I've used my cast 36 gr slugs and they shoot pretty accurate if you cherry pick them meaning look threw for defects they are running 970 ish and h&n slugs 40 gr are a Lazer at 935 ish which I'm happy with