2nd trip to the range with my Ruger American 450BM today.
I lengthened m OAL to 2.055 so when I tapered to .474" my case lip tucked into the lower crimp groove of my Lee 310 I casted.
I tried three loads, an air cooled clip on wheel weight boolit I powder coated and gas checked sitting on 35.5g of H110. It grouped the best. 1.190" at a 100 yards.
Then I tried the same boolit water quenched, gas checked and powder coated. H110 at 35.3g measured 1.6" and 35.7g measured 1.86"
I have trouble loading pics on this sight but here's a link where I did...
http://castboolits.gunloads.com/showthr ... -Lee-310-s