Tried it in my 7mm Weatherby mag. Used a max load of MRP. Rem 9 1/2 M primer, Wea case with an OAL of 3.370. Vel was 3327 ft/sec and accuracy was sub MOA at 100 yrds. Great load.
I'm currently shooting the bullet in my mkv accumark with 71 gr mrp at 3 360 col at 3300veloctiy with a 215gold metal match primer , but my rifle has a 8. 1/2 twist perfect round for it