Home Forums Reloading Big Game Rifles Winchester Magnum Rifle Powder Data

I recently bought an 8LB can of unopened Win MR Powder. I was hoping to use it for a 7MM Rem MAG with 160gr bullets, but am not finding much data. Can anyone help me with data for loading. Thanks in advance.

Hornady #6, page 330, Winchester WMR/7mm REM MAG, WIN WLRM primer.
162 grain bullets (SST, A-MAX, BTSP)
Start 56.7 grains (2600 fps) - 67.2 MAX (3000 fps).

Barnes #3, page 281, WMR/FED GM210 primer.
160 grain bullets (XFB, Solid)
Start 60.0 (2692 fps) - 65.0 MAX (2916 fps)

Ps I just dug up some old Winchester/Olin reloading booklets in my shed. W-W/Olin didn't publish any data for the 7mm Rem Mag and WMR powder in my mid 90's, 1999, or 2003 data booklets (in fact they seem to have ignored the round completely except for some WXR data). You might try a Speer #12 Manual; I have Speer numbers 10, 11, 13, & 14. None of those reference WMR with the 7mmRM, but the era should be around the time of the #12.

The Speer #12 doesn`t use WMR with the 160. Neither do any of the 3 Nosler books I have nor the 4 Sierra manuals. Lyman #47 & 48 and the Hodgdon #25 and #26 are no go`s also.

Thanks a bunch that will get me started. Forks