If dumdum wants hunt rabbits with the Mk3 wouldn't he be better off with something slightly more modern?
I had a lovely 60's Mk3, and agree they are very well made (gorgeous blueing and stocks!) but with the recoil, fairly heavy trigger & open sights I would have thought the range to be quite short to avoid the risk of maiming animals.
I think mine ran at about 9-10ftlbs, it didnt deisel, but it did kick! I would have been more comfortable hunting with a HW or something.
best wishes
Scott