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Can this powder be used for .243 ammo?
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IMR-3031 From 29.6 grains to 35.5 grains for 100gr bullets in the 243 win. The powder is to fast burning for best accuracy, but usable. Start low on the powder charge and work up for safety.
Data from Steves pages >
http://www.stevespages.com/page8a.htm Old IMR data shows a maximum of 35.5gr- 2825 fps-100 gr bullet- 51,300 cup pressure-COL 2.710"- 9 1/2 primer.