How short is short.
Tobin's built in Norwich, Conn. are decent guns. I can't say about the Canadian ones, though.
They are not expensive guns and if the barrels still a decent length of choke, might be a good back up gun at that price.
To my knowledge, Tobin's were not built after about 1920 and therefore should be shot with low pressure loads. I don't know if the Tobin name was used after that time even though guns were built in that style for twenty five or thirty years. Any built after the twenties could use SAAMI loads.
Hope this helps a little.
Best,
John