I don't think either one of those rounds would be very good choice for somebody with minor arthritus as they will hurt. if he reloads get a 7 mm TCU. I'm not sure what the correct name for it is but there is a 6.8 spc( or something like that) which is a 270 caliber for which there is factory ammo.
another thing to consider is if the 357 mag is legal for deer is the TC in 357 mag with a 10 inch bull barrel or a ruger blackhawk in 357 with the 6.5 inch barrel using a good bullet. while I consider the 357 mag just a bit on the light side for deer but if you keep your shots under 50 yards it would work ok with practice. it would also be a lot easier on the hands recoil wise.
Last edited by steveno; October 3, 2012 at 12:47 PM.