IMR7828SSC vs H4831SC vs Magpro for 270 WSM???

N

Nathan

New member
My dad is wanting to redevelop his 270 WSM hunting load.

He would like to go to the Speer 150gr Grand Slam.

For powder, we are stuck and looking for some experience. We're thinking one of those 3 powders. What order should we try them? What have been your results?

Other thoughts?
 
I found a very accurate load for my model 70 using the Hornady 140 BTSP Interlock and MagPro. My rifle must have a short leade, because seating just .080" farther out than the Accurate recipe (2.84 instead of 2.76) I got stiff extraction and flat primers a full 2 grains less than the listed max, so backed off a full grain. I never got a chance to chrono the load, but it would shoot ½" groups regularly at 100 yards, and killed a whitetail buck like lightning.
 
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