7mm Rem Mag - IMR 4955 and 139gr SST

Rathmatik

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Jan 6, 2020
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So, I finally found some powder for 7mm Rem Mag (for my dad's Bergara B-14). My LGS had some IMR 4955, and it's listed directly on the bottle. I've also found quite a few bullets/weights that have data online and in my Lee manual. It's pretty close in burn rate to H4350. I also have some 7mm 139gr Hornady SST bullets (#28202). I found the below data on Hodgdon's website for 139gr (says GMX). Would this be fine for the SST as well? My Hornady #10 manual doesn't list it though.

I thought that in general, same weight and similar bullet style (jacketed) would work similarly. Beginning at the starting load of course.

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