Originally Posted by CZ550
They vary for a number of reasons:

1 - some haven't done fresh testing using improved powders.

Bob
www.bigbores.ca



I’m writing about identical powder and bullet, granted different barrel.
But the extra 5 grains of powder with one and both seem to be listed as maximum - with the same velocity. Further they are two trusted sources.

I prefer classic.
Semper Fi
I used to run with the hare. Now I'm envious of the tortoise and I do my own stunts but rarely intentionally