The only drama I can think of (If the rounds will chamber easily) aside from possible misfires is if you have some old .38 Auto rounds. Some have 0.360-0.361" diameter bullets for the early Colts. It seems Winchester was about the last manufacturer to use the larger Dia. bullets. (I still have a very few for the various old Colt autos as accuracy is rather better than with the non-corrosive primed Remington and UMC brand vintage .38 Auto rounds.)