- The expense.
- It requires extra care when cleaning, you can’t use anything abrasive. If you damage the surface finish, the metal degrades quickly. Follow the manufacturers recommendations and you’ll be fine.
- They’re ammo sensitive. You’ll typically find those ammo restriction written right on the barrel. My 296, 340PD and 342Ti all have different barrel warnings. Some magnum loads with light bullets can erode the front of the cylinder firing just a few rounds. Heavier bullets (jacketed and lead) can also cause a problem, where the gun acts a bullet puller for the remaining cartridges in the cylinder under recoil. In some cases the bullet(s) can extend past the cylinder face, seizing the gun. Follow the manufacturers recommendations and you’ll be fine.
Check out the photos in this thread.
Disappointed with the 340 scandium