Mtnman:

Thanks for the info. But I'm still not clear. Here is what he said:

" This is what I'm thinking so far...I have a TC Encore muzzle loader. I found a place that chambers for 375 H&H or even 375WSM or several other 375 standard or wildcats...Including the 376 Styer. The place is call Virgin Valley Custom "

That specifically implies a muzzle loader.

This is apparently what YOU are talking about :

http://www.tcarms.com/catalog/pg15_cat31.jpg.php

This is referred to as a T/C System.

There is the T/C System 1 in line rifle, interchangeable barrels. And there is the Thompson/Center Encore 209x50 Magnum with interchangeabe barrels.

For my participation it is always necessary to be very specific about everything.

For example when someone tells me they have a Winchester muzzle loader that they want to chamber for a centerfire rifle breech loader I understand it as a rifle that loads from the muzzle.

As a matter of fact Fred Hall, gunsmith, conversely specialized in converting centerfire, breech loading bolt actions, and lever action guns into muzzle loading weapons.

Bill Tibbe