Maybe it likes H-335. If it is a fast barrel it should shoot other powders and bullets fast too.
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<br>I checked the Hornady Manual. Max load listed for the 150 gr RN is 35.0 gr. I would say your load might be a touch on the warm side.
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<br>Don't let the lack of visible evidence, or a sticky action fool you. You could be way over acceptable pressure limits and not know it. 4 gr. over max is a lot for a 30-30 case.
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<br>Shoot a rifle/load combination you are familiar with. See if it chronos as it should. This is to see if the chronograph is functioning properly. If it is okay, I for one think you are pushing things a bit. Just for reference, the 30-40 Krag shows a max velocity of 2500fps. with the 150gr. bullet(Hornady Manual). Check out the case drawings. The 30-30 is quite a bit smaller. Another indication you are over doing things.
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