I used 2400 when moving magnum loads to max velocity and it always served me quite well. One school of thought is that you no longer need to use magnum primers, but to each his own. It's an excellent powder.
Quote:
I have used Blue Dot and Unique, but theyr'e not the best for top velocity
|
They're relatively fast burning (compared to 2400) and peak quickly. You want a slower burning powder for the velocity you're after. Just make sure you put a heavy crimp on the bullet so the powder has time to build up.