I just stumbled on this thread. I'm using IMR3031 in several .30 cal and 7mm cartridges, some for 20 years. Loads are very accurate and deer die. Don't know or particularly care about FPS or optimal burn rates as I'm too busy vacuum-packing venison. <grin>
My '06 load is 46 grains of IMR3031, CCI200 primer, Hornady 150gr Interlock SP #3031. I also use it in my 308 and 7mm-08, my son's 30/30 and a "loaner" .243. All have consistently shot <1" at 100 yards except the 30/30, which shoots 1 1/2" every time. I don't think either my sons or I have killed a deer in the last 20 years with any other powder.
Ron
