Got a single shot 45-70 last week, picked up a few boxes of shells, some dies and bullets, I found a load in a hornady book, my question to you fellows is has anyone loaded and shot 500 grain jacketed bullets from their 45-70? Is the recoil going to knock me on my ass? The book said about 1800fps behind some 3031, any input would be great!
Well, I see that while I was composing the chapter below, several others have chimed in, but FWIW:
1800 fps with a 500 gr. bullet is
very stout. Do you know if the rifle will handle it? (Ruger Nº1, no problem. Handi-Rifle, not so sure.) I load my Marlin 1895 to about 1750-1800 with 405 gr. hard-cast and the recoil is about 35 fps., roughly the same as a .338 WM. According to the
recoil calculator at Handloads.com, a 500 gr. bullet @ 1800 fps. over 53 gr. of powder (apparently this charge of 3031 will give 1800 fps), in a 7.5 lb. rifle, will generate about 52 ft-lbs.
So yes, IF your gun will handle it, you are going to get whacked hard. If you are accustomed to shooting a .458 WM, it probably won't bother you all that much. Otherwise a) put a Limb-saver pad on it and b) stock up on Ibuprofen.
Given that Brian Pearce took a Cape Buff with a Cor-Bon load of 405 gr HC @ 1800fps and the bullet went clear through both shoulders and into a sow behind and killed both - to the amazement of his PH - you don't need that much thump for anything in N. America, but we all know that isn't always the point

As I recall. one of the guys here on CGN, who carries a Guide Gun for protection in the bush (and who also has an ATC for a handgun) was loading Jae-Bok Young's 550 gr. hard-cast "Piledrivers" to about 1500 fps. and he seemed to feel safe with that.
While we're on the subject of recoil, I can't resist adding this story:
From Cartridges of the World, 11th Ed., p.224
Around 1960, Fred Barnes (of Barnes Bullet fame) built himself a 475 A&M-chambered rifle, based on a sporterized Enfield action. With its open sights that rifle weighed no more than 8 pounds. Being Fred Barnes, his initial handloading effort combined stiff charges of IMR 3031 behind his 600-grain bullets***. He, friends, and a small group of well-wishers went to an informal shooting range near Grand Junction, Colo. Fred sat down on the pea gravel of the parking area and crossed his legs to fire from the sitting position. He took dead aim at the base of a small juniper tree, which was tenuously hanging on at the top edge of a roadway cutbank.
When Fred pulled the trigger, everyone was watching for the impact. The shot went low. The tree was summarily uprooted! All watchers cheered as the tree fell, then, as a group, they looked around to find what Barnes' reaction might be. There he was, located several feet behind his original position, lying on his back, arms outstretched, holding the rifle above his head. Dust from the muzzle blast and his ignoble recoil-induced slide (he had absorbed well over 110 foot-pounds of energy) was still stirring when Fred asked, matter-of-factly, "Anybody want to buy a rifle?" He found no takers.
(*** 600 SP | 105 gr. of 3031 | 2502 fps | 8340 FP)
Good luck
