Has anyone ever seen a T/C TCR 83/87 barrel chambered in 7 x 57 or 6.5 x 55?
Yes but probably not many floating around for sale. Here is one that has been sold and if you google Thompson Center TCR 7x57 there are several posted. I remember the Rock Island one and several of the 4 groups of 3 rifles were bought up by dealers and resold individually on GB.
https://www.gunsamerica.com/966110388/Thompson-Center-TCR-83-7x57-double-set.htmhttps://www.rockislandauction.com/detail/1033/6591/three-thompson-center-single-shot-rifles