cylinder residue, 38 vs 357 ??

not meant to be a "contentious' topic, just curiosity

this being so very frequently stated, i.e, 38sp leaving ring buildup in your 357 cylinders... it seems to be universally accepted verbatim, but I have never experienced it myself, wondering why not

I have owned and shot some (same) 357s for decades, but never did shoot a heavy diet of 357s, have fired countless rounds of el cheapo white box 38sp range fodder thru 'em, and occasionally will shoot up a box of 38+P, and once in a rare while some 357s

Just never have had any issues with aforementioned ring buildup in cylinder chambers. I do clean my guns before leaving range, or at least same day (whether one shot fired or a few hundred). Have never had any issues with longer cartridges sticking or ejecting or whatever. It is very rare that my cylinders are touched by a brass brush, just solvent and patches... always left mirror clean & shiny, no special effort, and all rounds always drop in and drop out effortlessly

I know it can happen. it obviously does happen for some.
Maybe related to handloading and/or cast bullets ?
(most range fodder these days is jacketed or coated anyway, perhaps due to indoor range lead issues, I dunno, but I never had any issues whenever shooting factory RNL either)
Maybe related to round count cartridge X vs Y in-between cleanings ?

just honest curiousity...
Is this a very real phenomena for you, or is it one of those things we presume to be an issue simply by merit of being so oft mentioned ?

thanks

PS
same can be said of my 357 carbines, always clean 'em routinely, never had an issue switching to longer cartridges, even same range session, though I hardly ever do >100 rounds per session, most often only 50 in some one cartridge vs mix-n-match
(understood, I am prone to err on the side of caution on such things, and recommend that everyone else should also, not sayin' any different)

"Or you just aren't seeing the hard carbon rings."

yup, you right, rc, (no big surprise, that)..
just had to look close enough, I just pulled 'em out and had to "see it" after your post
Inattentive, I guess, just never had good enough reason to really look for it, but there are "carbon rings" in there, in both of 'em

vintage specific mebbe, I dunno, sloppy bores mebbe, but if so, I can live with it
they way they both still lockup and shoot, got no good reason to care
about a year ago, mounted a 3 moa red dot on 'em, "just to see" as they say..
cheated with the grip butt planted on a sandbag, of course (crappy hands, fuzzy eyes), one not-real-ragged hole @ 15 yards, 6 shot groups half the size of and well centered in 1" shoot-n-see dots...won't win any medals, no, but better than I ever could do off-hand... "what's not to love about this", I said... last time I did that off-hand w/ open irons was so long ago, T-rex was more feared than Grizz...
(well, the balance of a k-frame w/ that silly stuff setting on top of it, that's not to love, been there, saw that, did that, and took it back off)

my favored two (only two I ever shoot any 357s out of anyway, k-frames being my woobie thing)
model 66-2 - bought NIB about '83/'84, price $309, "to die for", been shot a lot in the ~25 years since, but not hurt a bit
model 66-3 - vintage ~1986/90 mebbe, bought used but not abused, mebbe 4 years ago, cop gun is my guess, somebody left it in leather for too long, but they sure didn't hurt it none by shootin' it too much, price $330
can't tell 'em apart off-hand or off a sandbag

but, yes, they are both "ringed", and I never have put a brush thru the -3 cylinder, and cannot remember last time I ever put a brush thru the-2 cylinder

so... had to pull some 357s out of the box tonite (cheapo Remington 125gr JSP, not Super-Vel, you know), and drop 'em in.. and they do, drop in clean, one at a time or speedloader six at a time... and if you turn the guns up at ~30 degrees (not 45, not vertical), they fall right out too... haven't shot anything hotter than 38+P in 'em in quite a while, but now I am going to have to do some 357s this weekend, just to see if fired casings drop as expected.. I do have some 158s buried somewhere in that box
(what I get for speaking out of turn, I reckon)

well, all I am really seeing in mine is just carbon blacking at the counterbore depth of max length casing, at transition to lesser bullet OD than casing OD, that's all
not unlike the concentric carbon black rings on the front cylinder face, not gummy or hardened residue like that prone to accumulate under top strap at forcing cone if not kept clean, just "stain", shows the gun has been put to proper use, that's all.. (all of which can be removed, just not worth the effort)

better explanation than any other I ever heard before
thanks, rc