FWIW:
I have a beater 629-4 with .4295 cylinders & the leade in the cylinders as already stated is pretty far forward. Years ago Brian Pearce did an article on this very subject when he was reloading 45lc's. His picture not mine, he wrote about moving the bullet forward into the leade for accuracy.
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The .4295" cylinder holes are a plus compared to the .432" cylinder holes in a 29-3 that I own. Playing around with wc's in the 629 I get excellent accuracy with the type III wc's with the tapered noses. The bullets are crimped in their crimp grooves (200gr & 245gr). The strait sided wc's do better when they are seated out either into or next to the taper of the leade.
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Like others I have a lot of different 44cl molds and the issue I have is if I load the bullets long to get then to sit in the leade of the cylinders there isn't much left for case neck tension/crimping. Myself I try to have a minimum of the bullet's diameter in the case for neck tension/crimping. Most of my 44cal bullets don't do that when loaded long into the leade's of the cylinders.
IMHO:
Bullets with the smaller front drive bands tend to do better with seated back (freebore) from the taper of the leade's. Rounded shouldered fn/wfn tend to be more accurate when driven hard. I can only assume it's because in both cases there isn't as much distortion as the tapered bullets align in the leade's. It's actually pretty hard finding a bullet that's long enough in the body to fit into the leade of the cylinders of that 629 and still have enough left in the case for neck tension/crimp. The end result is either heavy long bullets or extra with wfn's. Those long bodied 220gr hbwc's do extremely well when crimped in the top lube groove. The nose of the hbwc has a slight bevel designed for a crimp but it also aids in aligning in the taper of the leade's. I made these home made jacketed bullets for the 629 and a 44mag contender. The top crimp groove is for the 629 & the bottom crimp groove is for the llllloooonnnnnngggggg throated contender (looks like 10" of throat & 4" of rifling when looking in that 14" bbl). The wfn nose is designed for the taper of the leade in the 629's cylinders.
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Getting the bullets out into the leade's of the cylinders in nothing new, the long bodied bullets makes it a lot easier. 357mg's loaded with wc's.
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Testing loads for accuracy in a .432" s&w 624 using those 220gr hbwc's sized to .432"
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Between the pc increasing the nose diameter of these mihec 640's and crimping the bullets long/bottom crimp groove in 38spl cases. They have a good fit in both my 38spl & 357 revolvers along with limited distortion from the standard pressured 38spl loads.
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When loading the same bullet in 357 cases I still use the bottom crimp groove.
To me the issue with getting the bullets out there in the 44cal's is there isn't a lot left for case neck tension and crimping.