I got back into 45-70 when I inherited my dads old Ruger #3 in the caliber. I used to hate the thing as a kid growing up, because it was so brutal to shoot. My dad didnt reload, and I dont think I ever made it through a box of 20 factory ammo, even as an adult.
I was going to get rid of it, but figured Id see if I could come up with a plinker load for it, since I do reload. Now that the cowboy shoots have been around for awhile, and its a popular round, there is a lot of info available. I settled on a hard cast 300 grain LFP over 14.0 grains of Trailboss. Its a whole different critter now, and an all day blaster.
Soon after I figured that out, I got a Marlin Guide Gun. Both are now two of my favorite rifles. I dont hunt much anymore either, and most of my shooting with them is paper blasting, but even with the reduced load, that 300 grain bullet is still running around 1200fps and generates almost 1000 foot pounds of energy, and Im sure would be fine for the whitetails around here.
As I just hate recoil pads, and prefer a shorter LOP, I took the pad off my GG, and its now an even sweeter shooter, and with the load above, still an all day shooter. Even with heavier loads, I find the shorter LOP allows me to better shoulder the rifle properly, and deal with the recoil better than the gun with the pad mounted. Its more like shooting the old military rifles I learned on, and still shoot today. I actually much prefer a properly stocked rifle with a checkered steel butt plate over anything most of the makers offer today stock wise. For me, they are usually way to long for any kind of practical shooting.