I did a 25/20 about 4 years ago, it was my first major project like this and it came out great, really love the round. What I did was line a 28ga barrel, I bought the liner from track of the wolf, drilled it by hand, using an 18 inch bit that brownells sells just for this purpose, you drill from the muzzle and then from the breach. I used acraglass to install my liner then modified the extractor, cut the chamber and crowned the barrel. It has made a great small game rifle, very accurate. Several years ago I ordered a custom set of lee collet dies for the 25/20, best $50 I ever spent for reloading dies. Really extends the life of the brass also. Came with the collet die and dead length bullet seater. I have shot a variety of loads and the most accurate for me is an 86gr Remmington with IMR 4227 that chronos consistently , at 1650, I have taken this load to 1750 with no signs of excess pressure and the case still almost drops out but accuracy does suffer. I have probably fired 2k rounds through the rifle, the shotgun barrel I used had the brazed underlug on it and it has held up with no signs of wear. One of these days I will get around to doing another in .32, I bought several shotgun barrels from numerich just for to experiment with.