That is a very tough revolver(pistol is usually a reference to an autoloader)that is not at all ruined. As many have told you already, the chambers are fouled from the .38 SPL you shot in it first. It is very important to clean your chambers after shooting the shorter ammo before firing the .357 MAG ammo, as high pressure could result from the crud squeezing down on the case mouth holding the projectile too tightly. In the .454 Casull revolvers by Freedom Arms it is imperative to clean the chambers after using .45 Colt ammo before firing the full length .454 ammo through the gun. Even their fine and very strong revolvers could blow up if misused like that.
"Even their fine and very strong revolvers could blow up if misused like that."
Yikes, that is a scary thought. I'm going to buy a brass bore brush tomorrow. And I will never shoot both types of ammo again, unless I've first brushed out any build up.
Thanks!
I have the 454 Casull SRH which also shoots 45 Colts. I load mild to wild and never fire 45 Colts for this very reason. A hot 454 load being shot after 45 Colts are not unknown to blow up due to the pressures created between the longer case wall and the bathtub ring left by the shoter brass. I've never heard of a 357 blowup, but it is sure possible.