https://hanksmessageboard.freeforums.net/thread/6730/advice-load-data-sml-4570?page=2Steverscout, it's a 45-70 CVA Scout that Jeff Hankins will be installing his H.I.S. breechplug so I can use it for SML during our VA muzzleloader season. It does not have a muzzle break on it. I plan on using sabots with 40cal 195 to 225 grain bullets and maybe 250 grain bullet to bore. I have VV 110, 120 and 130 powders on hand and have researched loads for each. I am mainly looking to ensure I have alternatives to shortages of Black, Pyrodex, 777 and BH209. However,the smokeless powder Hankins recommends, IMR 4198 and even 4227 is unobtainable in my area and online, it figures!
https://hanksprecisiongunparts.com/p/asg-gen2-replacement-plug-with-his-modules
https://hanksprecisiongunparts.com/...ns-dis-ignition-system-direct-ignition-system
You might want to consider having Hank (if he'll do it) install his Longer ASG Replacement Breech Plug to avoid the Long Smooth Section left by the .45-70 Chambering. Please see his Photo Cut Out of his Conversion above. You won't be able the use VV N110 without damaging your Barrel with Flame Cutting because of its Shorter Powder Column.
I use Hank's Longer ASG Replacement DI Plug in my TC Encore .45-70 Conversion so I can use down to 30 Grs of VV N110 without Damaging my barrel. I don't care for the Hard Recoil of the Large Charges of H4198 that are Required.