I have carried and shot both for many years. I am lucky enough to live in a place that I can shoot almost anywhere any time. I shoot at least 10 rnds. of each every week, practice is random targets at bear range 5 - 50 yrds. while walking on the beach or tundra. The .458 was a wm changed to a Lott on a Brno 602 (very heavy rifle) shooting 5 rnds as fast as I can is not very pleasant but is fun. The 45-70 holds 6 so as fast as I can shoot it I don't see a lot of difference in the pleasant part but the fun is still there.I have since sold the .458 and bought a Ruger .416 as a replacement much nicer to carry about the same to shoot. Now a friend has a .375 RUM thats a un fun rifle to shoot even once.stay safe
pounder
Which bolt gun? When loaded to its full potential, the 458 Win Mag produces far more energy than the 45-70, but the Guide Gun is light, and the lever loop is not friendly to your hand, so the felt recoil from a Guide Gun will be more unpleasant than most bolt guns in 458 Win Mag.
Ya, it has a kick to it with full loads, but that's half the fun! I hold it tight to the shoulder and let fly! My 12 gauge S/S with mag loads seems to have more punch on the shoulder than the 45-70.
In the GG - Commercial - Remington 405 Gr SP. That one has a bit of punch to it - ya, it kicks. Also have a couple of boxes of the 300 Gr HP's - those ones are not too bad. Oh - is now the best time to say that I also installed a nice fluffy recoil pad on that little bugger?
In my 45-70 Cowboy - cast only (Bullet Barn). Lighter loads = trailboss, heavier loads RL-7.
Those are not full house loads. Try reloading the 405's to 1850-1900 fps and then tell us what you think about the recoil in your guide gun. Factory loads are nowhere near that just in case you didn't know.