I’m assuming it is hard copper pipe, or was it refrigeration tubing?
The there are several OD diameters on copper pipe. And there is always the possibility of having frozen copper pipe swell. I have seen both issues.
Sweating ridgid copper today is not fun. Elimination of lead from the solder has required you to use something hotter than normal propane to get the pipe to melting temperature before the flux chars.
I bought a torch to try desoldering, but I chickened out when I saw I had more than enough pipe. I’m glad I didn’t go that route. It sounds harder than I had hoped.