I never tried the bushing neck dies but I think they will work well. I get excellent results using the Lee Collet Neck Die and highly recommend it. I don't particularly like the neck dies that pull the expander ball up through the neck. Seems to defeat the purpose of neck sizing vs...
Good shooting.
As much as I don't like Hornady, multiple bad experiences with their customer service, their 350 grain jacketed bullets are great for the 45-70. There are several good powders. I favor H-4895.
Another Bull's Bag fan here, the large one. I have to place it on an elevated rest (block of wood) to get it to the height I want. I use it with a good rear bag. After load development I switch to a bi-pod.
I don't trust my government and I want to be independent in the event ammo is no longer available. I have a good supply of components and the know-how to use them properly. I also cast bullets for a few of the guns I have and am learning to make black powder if needed.
100 yards distance is not long enough. 200 is minimum, 300 is better.
During OCW load development I make/use a grid target with grid lines every 2 inches and place a 2" round orange target in the upper 1/3 of the grid. The orange target is the point of aim for every shot. I like the orange...