A question about Marlin Lever guns

[Larryjk]

I have two Model 94 Winchesters, one in 30-30 and the other is 32 Special. I have tried cast bullets in both rifles. the 32 Spec does not shoot them well whereas the 30-30 does a fine job. I have read that the 30-30 has much deeper rifling--hence the better accuracy with the cast bullets. Maybe that is the answer because the 32 Spec is more accurate than the 30-30 with jacketed bullets. I got the 30-30 specifically for shooting cast bullets, just for fun.