I finally found a good load with this powder. I loaded 83.5 gr with a hornady 180gr spire point and applied a crimp with a lee crimp die. 3040fps and sub moa. The crimp was the key. This powder is really slow and the crimp cut the sd in half.

You didn,t saw what kind of powder,but think of this.Using H4350 and only 60grs , with a 180 gr bullet one can get 2900fps out of a 30-06! Some would question on taking all the recoil of the 300win.and using 23.5 grs more powder just to achieve 140fps? Glad it groups better for you,maybe thats what it needed. vangunsmith

The powder was ramshot magnum. Have you actually chrono'd that load and if so how long was the barrel? I ask this because most reloading books list not much more than 2700 fps as the max velocity with a 180 gr bullet in a .30-06.

The old '06 can be safely loaded to produce over 2800 FPS with a 180-grain bullet, but I suspect that any load that gives as muchas 2900 FPS, USING ANY OF THE 4350's is a little on the HOT SIDE!!

Hmmm . . . . there may be something to this crimp thing. Although I was taught that it was almost never done in rifle handloading for accuracy reasons (unless the recoil of the gun was pushing the bullets back into the case), I know that in the .44 Rem Mag it helps with consistency of velocity with slow powders. Maybe some of the same logic applies to rifles as well.

Some folks have reported better accuracy with crimped loads...I've said it isn't necessary. You can crimp some and see if it helps.....but for the function of the cartridge it don't have to be crimped.

The .44 Magnum MUST be crimped as the recoil will pull the bullets out of the case and sieze the cylinder of your revolver...or if you shoot it in a lever gun it must be crimped to prevent the opposite.