If fortunecookie45lc on YouTube is correct,when determining the correct size cast bullet for a revolver the diameter of the cylinder throats is more important than the barrel diameter. He suggests dropping progressively larger bullets into the chambers until one is found that requires a gentile push to push it out. That works for model 19-2 4" and on my model 38. However, the chambers in my 4" model 29-2 seem to be much too large. Lyman 429421 bullets sized at .4327 go right through. Has anybody else encountered this?