When the 600 Overkill was being developed I thought, oh I gotta have one. Then I got my 500 Jeffrey back from the gunsmith and put together a few starter loads. After lighting off three 600 gr pills over 100 gr RL15 that clocked right at 2200 fps my enthusiasm for something bigger was completely gone.
While I appreciate the wonderful history of the Gibbs, I just can't see burning even more powder in a sporter weight 50. If I was to do a 50 again it would be the 500 A-sq. More than enough in the fuel tank and relatively speaking easy to come by brass.
