Both Buffalo Bore and Garrett produce high performance lever gun 45/70 loads.
https://www.buffalobore.com/index.ph...duct_list&c=35
45-70 Magnum - Lever Gun Ammo - 500 gr. FMJ-FN (1,625fps/M.E.2,931 ft.lbs.)
45-70 Magnum - Lever Gun Ammo - 405 gr. J.F.N.(2,000fps/M.E.3,597 ft.lbs.)
http://www.garrettcartridges.com/4570.html
I have tested some the Buffalo Bore velocities and yes they match their claims.
We use only factory stock firearms in recording published velocities, so you get true, actual field velocities with our ammo -- not exaggerated long laboratory test barrel velocities.
Item 8A (430gr. Hard Cast penetrator)
➤ 1920 fps -- Marlin 1895, 22-inch barrel
➤ 1879 fps -- Marlin 1895 Guide Gun, 18.5-inch barrel
Item 8B (405gr. JFN expander)
➤ 2002 fps -- Marlin 1895, 22-inch barrel
➤ 1955 fps -- Marlin 1895 Guide Gun, 18.5-inch barrel
Item 8C (350gr. JFN penetrator)
➤ 2145 fps -- Marlin 1895, 22-inch barrel
➤ 2060 fps -- Marlin 1895 Guide Gun, 18.5-inch barrel
Item 8D (500gr. Barnes Buster FMJ-FN penetrator)
➤ 1628 fps -- Marlin 1895, 22-inch barrel
➤ 1590 fps -- Marlin 1895 Guide Gun, 18.5-inch barrel
Item 8E (300gr JHP expander)
➤ 2355 fps -- Marlin 1895, 22-inch barrel
➤ 2263 fps -- Marlin 1895 Guide Gun, 18.5-inch barrel
Many a Grizzly Bear, Cape Buffalo, Bison and other dangerous game have fallen to our 45-70 loads since we began 45-70 production 1999. Below is an idea of what type of game these loads were designed for.
Item 8A -- for game where 5 to 6 feet of straight line non-expanded penetration is needed.
Item 8B -- the bullet utilized expands to an inch or more in diameter at our velocities, and hence penetration is limited to about two feet in flesh and bone. This is the single most effective hog and black bear load ever devised in 45-70. I don't use it on animals weighing more than 800 lbs as it won't give adequate penetration at bad angles for animals larger than 800 lbs. If you'll limit yourself to broadside (double lung) and CNS hits, this load will work on 2,000 lb animals.
Item 8C -- The bullet we utilize in this load is very tough and gives only a small to moderately sized mushroom (about .60 cal) and because of the smallish mushroom, it penetrates very deep -- about 4 feet in muscles and bone and as such is a great bullet for use on dangerous game and smaller game too as it does expand some. This load is the most versatile of our 45-70 loads.
Item 8D -- This bullet is a solid and won't mushroom and thus will penetrate 5 to 6 feet in muscle and bone.
Item 8E -- the bullet utilized in this load will expand radically and will penetrate only about 18 to 24 inches in muscle and bone and was designed for use on animals weighing no more than 400 lbs. At 2350 fps it is very fast and flat shooting. (For a 45-70)
500-gr Woodleigh Weld-Core JSP at 1600-fps
540-gr SuperHardCast gas-checked Hammerhead at 1550-fps