I'd like to see a run of 1-S-C 450 NITRO EXPRESS, with 26" barrels. This would be identical to the two small runs of 45-70s that were built a few years ago. The "C", as I understand it, is the 375 H&H barrel contour. The guns weigh about 8lbs, which would make for a proper 450. The Bodding guns in 450 should have been built this way, IMHO. BTW, one can punch the the chamber out, in the 45-70s, to a longer Sharps length to approximate 450NE performance/pressures, but you can't rechamber to 450NE, because 450NE rims are too thin.
This truly is wishful thinking, on my part, as I just don't see enough interest in such a rifle. For most of the hunting I do, I would load 300-330 grain cast bullet to "NITRO-FOR-BLACK" performance. A 45-70, loadedup or down, would be more practical, but I like historical rounds and historic rifles. I would have Turnbull do his thing, as well.