For the poster who has the 25-5.

Yes, the cylinder throats are usually too large. You need pin gages to measure the throats or find a buddy who has them.

You can get .454 sized bullets for 45 Colt from some vendors. Only measuring will tell you what you size you really need.

You may also need to slug the barrel and measure the slug to get the grooves diameter.

If you handload, DON'T swage the bullet diameter down when you seat the bullet. Use "M" dies to create a nest instead.


Prescut