Quote:
Originally Posted by charlie brown
My Lee book is showing that 42.0 to 44.5 is the range for H4831 and a 95 grain bullet. I am not sure what data you are using, but if that is in the range, and it shoots good, by all means use it. No reason not to. If the bullet in the factory load works, then there is no reason the bullet in your handloads won't work at reasonable velocites.
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I'm using the latest edition of the Hornady reloading manual. It shows 38 grains of this powder with the 95 grain sst bullet as the min charge and 42.5 grains as the max charge. I didn't even try the max charge but tried several charges up to 41 grains and this one shot the best. The 38 grains shot the next best with the 41 grains shooting the worst. Groups went from about .5" to about 1.5" for some reason. I'm not at all sure why such as small change made such a big difference. The book only lists a charge for 2800 fps and one for 2900fps. The factory ones are listed as 2850fps so I took the difference between the two charges listed in the book and split it which is how I came up with 40.3 grains. It also shot the best so I stuck with it.
Is there maybe a difference between H4381 and IMR4831? I thought they were supposed to be close but not exact. Or are they? I've never tried the H4381.
I also didn't know if there were any issues you had to worry about with reloads like fragmenting if you didn't have the right charge. I know with muzzle loaders if you push a bullet like the Powerbelt too fast with too much powder it seems to fragment. I didn't know if that was a concern with these reloads or if since they should be similar to a factory load velocity wise I should be in good shape.