I'm 75, live in Ky and shoot daily...we're on a farm here and my range is right out the back door...it's been a daily habit for 33 years now. I'm active with all of my guns, from .22 to .44 Magnum, but seldom shoot anything that chrono's over 1000 fps.
This week, for example, I've been working up loads for a .38 Spl Smith M-36 using Ed Harris' recommended .38 Spl load of 3.5 gr of Bullseye & Lyman's 35891 full wadcutter. A nice load BTW... Also working with a M-66 Smith duplicating the accuracy of that 3.5 gr load but in Magnum brass (~4.0 gr of Bullseye does the trick). It makes for a pleasant day, loading in the basement, then trotting out to my 25 yd range to try 'em out.
I'm restocking my supply of Lyman's 35891 & 358156 gc using an alloy of 50-50, wheel weights to lead as these won't be used for hi-speed loads. I've cast almost 2000 bullets over the past 4 days,...an hour and a half in the am, and the same after my wife heads up to bed in the evening.
For you younger guys, I'd recommend some sort of daily regimen...mine is coffee then a morning walk with Molly, my Shorthair'd pointer....I do ~ 3-1/2 miles and she triples that number! Then chores around the farm...I go armed all the time...carrying whatever's my current interest...for the last month or so it's been my .38 & .357 revolvers...this sort of mental and physical activity keeps me fit and alert to the joys of my wife, and grand children. It's not just the shooting...it's being out there in the fields and woods, still able to do it...
So hang in there...arthritis is my constant companion and maybe yours too, but that's why they invented Tylenol! If you keep busy, keep your mind and hands in shape, you'll be shooting longer than you might have thought possible. It's worked for me and from the 10 yd line, I can still shoot 1" groups with an unsupported Weaver Stance. BTW, don't neglect your hearing protection and get glasses that'll let you keep the front sight in focus...
Best Regards....1st Pic from when I was 68....Ruger .44 Spl @ 25 yds rested. 2nd pic when I was 23 flying for 5th Spl Forces near An Loc, lll Corps, RVN 1970. Sidearm in the pic is an issued Smith M-15...but for most of my tour I carried a Browning Hi-Power in a tanker, cross-chest holster.
Best regards, Rod