A revolver shooting shotgun shells, atleast normal sized shotgun shells, is just illogical. It would kick like a mule who just got 1v1 quickscoped rekd on rust. Video games shroud this, but guns are very technological for seemingly just hitting a firing pin on a bullet. There's a lot to go into making a gun, that a) fires a projectile at a fast speed b) fires said projectile straight out of the barrel. Building your own macgyver-centric gun is just a waste of time really. Really powerful and really wealthy companies can make a much better, and more reliable weapon.