I am in the process of converting my 12 GA Springfield into a 45-70 Govt DR. I am using 4140 for the monoblock. I was thinking about regulation and hit on the idea of using laser lights to regulate the barrels. I found one that is good up to 3000 feet. I am going to make an adapter that will fit it to the cal I want to use . I will probably get two of them and w/ a spotting scope try to regulate it for 100 yds. Any thoughts.
Vinnie