Not sure if the crimp groove(cannelure) is usable due to length, functioning may require not using the crimping groove, this is not a "positive".
I agreeFor the 45/70 I believe you would be better off using a bullet with a crimp groove in the proper place to allow proper functioning in leverguns.
Seabass & John Y
As a note of interest, the local guy I get my cast bullets from has also supplied me with some 'modified' Speer 325gr HP bullets that are designed for the 50 AE. The modification I'm referring to is he has added a cannelure groove so I can crimp them when I use them in the 500 S&W. Kind of a neat little tooland would probably be the answer to doing the same for the Hornady 500gr slugs so they can be used in the lever action 45-70, if you have a real desire to do so
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In my Marlin 1895GS, the two jacketed bullets of choice for me are either the 400gr Speer or the 405gr Remington, 'pushed' by either IMR 3031 or IMR 4198.
For the heavier loads using cast, there's a 420gr GC beauty I get from a local friend that works well with the same fore-mentioned powders. For a lighter cast load, there's a 405gr BB item I get from another local supplier that I've got good results with, using IMR 4227 and a filler. At the moment I'm in the process of possibly changing over to Trail Boss for these lighter loads. Some of the preliminary results look good.
For me personally, I'll leave such examples as the 500gr jacketed and the 500gr & 535gr cast for the 458WM.
Try 13 grains of TB under a 405 grain cast boolit. Works a treat with almost no recoil and the bulky TB nearly fills the case.
For gas checked cast boolits I like H322 best of all.
Seabass & John Y
As a note of interest, the local guy I get my cast bullets from has also supplied me with some 'modified' Speer 325gr HP bullets that are designed for the 50 AE. The modification I'm referring to is he has added a cannelure groove so I can crimp them when I use them in the 500 S&W. Kind of a neat little tooland would probably be the answer to doing the same for the Hornady 500gr slugs so they can be used in the lever action 45-70, if you have a real desire to do so
.