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Misssissippi Dave · February 15, 2013, 08:10 PM

I would think you could go to 4.6 grains with that primer. Beyond that I would be watching carefully for any pressure signs. WST is a great powder in .45 apc. When you start to get groups that are spreading out as you go up in charge, you have already reached the limit from what I have seen. WST does burn clean and measures well. Increase only .1 grains of powder at a time.

February 15, 2013, 08:10 PM	#6
Misssissippi Dave Senior Member Join Date: December 5, 2009 Posts: 1,411	I would think you could go to 4.6 grains with that primer. Beyond that I would be watching carefully for any pressure signs. WST is a great powder in .45 apc. When you start to get groups that are spreading out as you go up in charge, you have already reached the limit from what I have seen. WST does burn clean and measures well. Increase only .1 grains of powder at a time.