Buy a Marlin Guide Gun in 45-70. You can shoot factory 300-405 gr. loads that will anchor the largest of whitetails. You can also shoot the Garrett loads available that will penetrate a Rhino. I have a 45-70 that I would not part with for anything. It' s the Guide Gun I mentioned. I have a 1.5-6 scope mounted on it and at 100 yards 3 shot groups rarely exceed 1.5 inches.