.30/30: cast bullets and IMR 4320

[Rocky Raab]

I haven't yet, but that's an interesting idea. IMR 4320 is a titch slower than 4895, so you could use 4895 loads as a starting point (and there are plenty of books that list such loads).

I'd use it only with gas checked bullets, though. Slower powders have the reputation of burning/melting the base of the bullet worse than fast powders. That destroys accuracy and causes massive leading in the barrel, as you might suppose.

As an example out of my own experiments with cast bullets in the 30-30, I use plain base bullets with 7.0 grains of 700X or RedDot for 1200 fps and great accuracy.

But when I nudge the velocities up by going to 4198 or 3031 or such, the accuracy goes to heck and the barrel fills with lead. Simply switching to gas check bullets cures both problems.