I would use .30-30 170 grain data minus a couple grains powder, or data for .303 out of an older Lyman manual, and start a couple grains low and work up. I would also use a chronograph and stop when I got to 1900fps out of a 20" carbine or 2000fps out of a 24" rifle. No point in pushing it hotter than the old factory ammo was.

"You can lead a man to logic, but you cannot make him think." Joe Harz
"Always certain, often right." Keith McCafferty