10% of case is generally what we've always done.

With that, 0.5 grains is MORE than enough.

I'd only load one of each personally.

Go shoot em at whatever distance you have.

It weeds out the bad ones to start with. Run over chrono so you can see the max coming speed wise/vs pressure.

Then I load up 3 of each of the best 3 in a row generally and shoot again to see.

That will start to confirm. I may do that 2-3 times. Then I'm down to 5 of the best. And from that load I may see if I need to tweak neck tension, seating depth or even something drastic like primer change to see what each one does with the best load at that point.

My loading with your info would be 64, 64.5 and all the way up to 67 or 67.5 depending on what max says, vs your bullet, coated or not and so on, IE all the variables.

Remember, you DON"T HAVE to shoot every one you've loaded if pressure shows...

Jeff

We can keep Larry Root and all his idiotic blabber and user names on here, but we can't get Ralph back..... Whiskey Tango Foxtrot, over....