Found a thread from 2007 asking about wadcutters feeding in lever guns. Only one reply there, and the overall general consensus seems to be that levers don't like wadcutters.
Well, here's what I stumbled upon yesterday.
While playing around with OAL with full wadcutters seated out (dummy rounds, no primer or powder), it seems I might have stumbled on a 'sweet spot', because I have dummies in both .38 and .357, BBWC (SNS Casting) and a H&G button nose (Bayou) that feed slicker than snot in my Rossi M92.
The gun is a 16" barrel medallion Puma from Interarms.
The SNS WC is .574 long, the Bayou is about .576, however, the distance to the shoulder on the Bayou is .068 in back of the nose. That means for a given OAL, the shoulder of the H&G design is going to be about .065-.068 closer to the case mouth.
Here's what I produced...
SNS Casting poly coated boolit (gold).
.358
148 grain BBWC
8 grains Hercules Unique (old), magnum brass
Taper crimp, just below crimp groove. Groove fully exposed.
OAL 1.406
Bayou Bullets poly coated boolit (green).
.358
138 grain (per website) H&G style Button Nose BBWC
15 grains Hercules 2400 (old), magnum brass
Roll crimped in 2nd groove from nose (first lube groove)
OAL 1.475
They seem to cycle just fine.