Sizing recommendation

[Little Big Oz]

I have a Super Blackhawk 5 1/2 SS. The bore slugged at 0.429. The cylinder throats are at 0.431, measured by pin gages.

Should I size cast bullets to 0.429 or 0.430?

Thanks.

[462]

I size .001" over cylinder throat dimension, others size .002" over. However, that's not to say that is the size your gun wants to see...experimentation is almost always required.

As a general rule, a boolit that falls or is easily pushed through a cylinder throat will result in leading, either on the throats, forcing cone, or the barrel.

[PacMan]

I would go with .430 at least. Depends also on what bullet you are using.If it will chamber i would try some at .431 or more.

Courious if the .429 is the actual bore or if you have some bore choke at the threads.