45-70 Trapdoor

[JReed]

The issue rifles had a 3 groove 1:22 twist. The chambers were cut a touch long so they could be fired dirty in combat. You can do what I did with my rolling block, take a 45-90 case and trim it a little at a time until it chambers my rolling block has a Springfield chamber and will take 2.2" case. The 500gr Gov bullet shoots great in the slow twist I use it out to 500 regularly with good results. Both Lyman and SEACO make a copy of it. Try the stock front sight out for awhile. I have fired a few trap doors with the buffington sight and the original front sight. It is an accurate combination capable of very good accuracy out to 500 and beyond.