Originally posted by Win38-55:
David Chicoine is an expert on these old Model 3's. I would be very interested in finding out more about why he thinks smokeless loads will eventually render these old guns unshootable,
Kirk, it sounds as if you're much more knowledgeable in the mechanics of this than I am, and I'm not gonna dig thru David's books to find the exact quotes, so my ever-unreliable memory may be significantly off on this -- I'd suggest going to his books for the exact nature of the warning.
I'm pretty sure he's put his thoughts on the topic in writing in one of his recent books. Maybe someone else here can quote chapter & verse, and if so, take that over whatever I report below.
THAT SAID, my recollection is that his primary warning was that of stretching (topstrap perhaps, rather than frame, not sure?) As I remember it, it's the difference in the timing of the pressure curve in smokeless vs. black rather than the pressure itself (even in LIGHT smokeless loads) that causes the damage. Again, relying on memory only, I have the impression that his opinion was that shooting even light smokeless loads would eventually render the gun unshootable, and pretty much unrepairable. (Why unrepairable? I dunno... maybe I've misremembered.)
I do shoot light smokeless cowboy loads in my NM#3's, but do so with the knowledge that I'm taking some risk when I do so. I know other folks who do the same.
I have also had vague non-specific off-the-record reassurances from at least one maker on cowboy loads that their loads "shouldn't cause any problem" in antique guns.
You pays yer money & you takes yer chances I guess.
I wish I could shoot smokeless in Model 3's without concern, coz I do hate cleaning guns, and BP loads start binding long before I'm done shooting on the few occassions I do make it to the range.
Now you know everything I know, and then some.
Other thoughts guys? - Jim