Hello Matt

I run 73 grains of 2206 with a CCI250 primer and 500 grain Woodleigh softs and ditto for Woodleigh 500 grain solids except 71 grains of 2206 which gives me the same point of impact for both. The below image is what it will shoot if the nut on the butt does his job.

As ozhunter says, start maybe 10% below any load data that you are given and work it up to suit your rifle.

Cheers CF