After the surprising results from the .38 wadcutters in the mini-Sharps, decided to try some things, and did some loading:
Yes, those are a ways out; I want to see if minimizing the distance the bullet moves before it engages the rifling might have an effect. Those .38 Special wc loads, the bullet had to make a looong jump, this puts the bullets from a short jump to almost touching the rifling. And yes, I did check them in the rifle, all will chamber fully with no problems. Which is something you can do with a single-shot rifle: these are way longer than I could use in a revolver, or a repeating rifle.
Speaking of, when I first got the Hornady FTX bullets that this rifle likes so well, I had to dig around to find load data for them, and it included this: for use in revolvers or lever-action rifles, you have to trim the cases shorter than standard due to the overall length of the cartridge because of that nice polymer nose. But in a single-shot, no problem with them being full length.
I did run into the interesting problem that my manuals show no data for a wadcutter in .357 Mag. However, the bearing surface- the area that actually engages the rifling- of the wadcutters is close to the same as for the semi-wadcutter, and I'm using a minimum load of 2400 in all of these, so I don't foresee any pressure worries.
Update: On the Hodgdon/Winchester site, they do have some info for 148-grain hollowbase wadcutters, but not solids.
Now for a chance to go see how they work.