since the only ca'tridge guns I own at the time are a .22lr, .22mag, and an old Mossberg 12ga I use at the VFW meat shoots it hasn't affected my reloadin' much.
and I've stocked up on muzzler bullets buyin' up ones folks were gettin' rid of for bargain prices so, hasn't been much affect on castin' either. but the hands are gettin' stiffer by the day it seems so that when I shoot the muzzlers I don't much like foolin' with anything smaller than a .45cal & really prefer .50 & over to keep from bein' so fumble-fingered.
as far as the back, with all the deteriorated disks & pinched nerves can't do much of anything for an extended length of time. even settin' upright in a chair for long kills it. so it seems I spend most of my time kicked back in the recliner. like I really needed any reason to be lazy