I shoot alot more shotgun now than I ever did,,but with lighter
reloads, it's easy on the screwed together shoulder,arms & wrists. Easy on the older guns too.
I still shoot quite abit of rifle, but all target & plinking as I don't hunt anymore. I like some heavy stuff but keep it to a reasonable limit to avoid any further problems. Cast lead bullet shooting in c/f rifles is becoming a favorite lately. Add the .22's and there's lots to do at the range. I've never owned an AR, AK or SKS! The Garand, M1 Carbine and Remington Mod 8 autos throw enough brass into hidding for me.
Handgun shooting hasn't changed much as far as caliber. Most anything is good as long as it's a bit different & classic.
I have sold off some semiautos though as it's difficult if not impossible for me to pull the slide back on some of them anymore. BHP was the worst, unfortunately,,I really liked those pistols.
Muzzle loaders (traditional) is a new/old hobby. Haven't messed with it in 40 years. Starting over is fun though.