HI!! everybody first post on site.I got laid off work today till spring probably so everybody knows that idle hands is the devils work shop so i decided to build my first rifle a allen box lock in 40 or 45 fast twist barrel from a kit from pecatonica river long rifle supply can i get a little input from you folks on the box lock action what i am looking to do is throw big slugs for the bore longer range I do cast my own and shoot bpcp but not alot front stuffer knowlage I do have two 50 's I want a shooter not a hunting rifle got anof of them but I dont want a lead sled so what do you think lets hear it and kit comes with green mnt.barrel the 45 is 1-18 the 40 is 1-16 twist my hope is to get 300 or more yards out of it maybe or maybe i am just blowing smoke tell me