Just purchased a Thompson Center muzzle loader

[Greg Blackburn]

I could easily be wrong, but post fire I think only the Hawken was made in .50 caliber.

 

[Ruben44]

I was under the impression they never retooled for them after the fire. Would be curious to hear if anyone has better information.

 

[Zonie]

My TC (factory) .54 caliber Hawken has a 6 digit sn.
According to TC, "it was made pre-fire.". The records of when such and such rifle was made by the SN, were lost in the fire.

I don't know. Did TC make any Hawken, Renegade, or Senica rifles AFTER the fire?

According to the information I have, the fire happened in 1996.
The Cherokee (.32, .36, .45 cal) was discontinued in 1994.
The Senica (.36, .45 cal) was discontinued in 1987.
The New Englander (.50, .54 cal) was discontinued in 2002.

I don't find a date for the discontinuation of the Renegade (.50, .54, .56 smoothbore) but it could have been before 2002. TC introduced the "Renegade Hunter (.50 cal) in 2003.
They made the Hawken model .50 caliber right up to the time that they stopped making sidelock rifles but I don't have a date for when they dropped the .45 or the .54 caliber guns.