.311 lead bullets are generally recommended for the .30-30.

HOWEVER, my personal grouping performance experience with those identical MBC bullets in my 1965 M94 has been less than perfection, and makes it more of a noisemaker than anything. I don't remember group size, but a long ways from tight. Anyway, I let those bullets sit thereafter.

I recently made up some .300 Savage loads firing 168 grain gas check lead spitzers against the MBC bullets. Powder charge was 23 grains of IMR 4227. Both loads were producing 3"-4" groups (from a bench rest with open sights) at 50 yards with my Remington M81, but groups with the MBC bullet loads were hitting about 10" to the Northeast of the GC lead spitzers. I thought that was strange.