Will the barrel from the Remington 700 work on the Remington 7600?

No, the barrel from a Remington 700 will not work on a Remington 7600. The two rifles have different designs, action types, and mounting systems, making their barrels incompatible. The Remington 700 is a bolt-action rifle, while the Remington 7600 is a pump-action rifle, which further contributes to the differences in barrel configuration.