compensator on smith & wesson 460 XVR

Question
on the S&W 460XVR, there are two compensators, one for jacketed bullets an one for lead bullets.  what is the difference?  why do you need two?

thank you.

Answer
Hi Chris,

 I have done a little bit of research on this question because you asked something that seems important, but does not come up often.
Yes, there is a difference between the two compensators, the main reason being that the lead bullet will leave debris and will be difficult to keep clean.

It seems to me that Smith had a pretty important reason to make the second compensator for the jacketed bullet, instead of just having the one that worked for both.
So far, I have been unable to get a good answer to that question. I would speculate that the compensator designed to work with the jacketed bullets is a bit more effective, but since it is more difficult to clean, they came up with the second version for people that shoot only lead bullets.
Another possibility is that the lead bullets will tend to "spit" debris from any orifice in the barrel that they come in close contact with, such as a compensator or porting. They may have been attempting to reduce the possibility of lead spitting from the ports on the comp. (Lead bullets will also usually be slightly larger in diameter than the jacketed bullets for any given caliber, this is probably intertwined into the formula too).

 Sorry I don't have the succinct answer for this one, but I will attempt to research it some more, and I will post again if I find a better answer.

Brad