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Old November 28, 2019, 10:26 AM   #3
std7mag
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Join Date: June 23, 2013
Location: Central Taxylvania..
Posts: 2,846
True, but.....
Are the bullet shape and dimensions the same?
Are the alloys of the jacket the same?

Alliant's data is max powder charge with velocities listed being a 24" barrel.
I'd use Alliants max, and drop 3 grains and do a ladder test.

Also, since your obviously handloading your COAL may be different.
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