sounds like what roster is saying is simply this:
if you must run smokeless loads through a gun designed for black powder loads, then, either:
a. have the gun proofed for smokeless loads, or
b. shoot the ammo the gun was designed for, black powder loads...
better safe than sorry...
makes sense to me...
Ed, you may have trouble with this because you seem to have trouble with the science of CCH......but I'll still give it a shot.
The problem we have with Roster's "advice" is it is not based on science. Stan alluded to that in the first follow-up post.....how do the barrels tell the difference between 7000psi produced by black powder or by smokeless. The quick answer is the barrels don't. 7000 psi is 7000 psi. Yes, there are different burn rates that adjust the speed with which the pressure builds and then tapers off....but it's still 7000 psi.
For a guy who sells vintage guns, you sure don't know what side your bread is buttered on.