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Old November 24, 2012, 02:41 PM   #24
Misssissippi Dave
Senior Member
Join Date: December 5, 2009
Posts: 1,411
I do .1 grain increments for my loads. Most of my 9 mm loads do have a range of about .3 where it seems to work better than any place else. As an example 5.1, 5.2 and 5.3 grains of a given power give the best groups. Anything above or below these amounts of powder and the groups started to open up. I will then load to 5.2 grains of that power making 50 to 100 rounds to see how well it burns when shooting more than just a test sample. There is a benefit in loading 9 mm test loads in .1 grain increments. You do have to look more for a pattern. Having a crono will also help.
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