I have used a Keith type bullet in 240 but went with a 200 Gr flat nosed Penn Bullet. Found it easier on the hand shooting a couple of boxes at a session.
I have an early 80’s stainless with the bobbed hammer, it also came with rubber grips. I agree with others, just get some snap caps and watch a movie wear out your index finger. With mine and I don’t know how many rounds its had through it but it’s got to be in the thousand or two, the trigger is what I would want in a short range defense weapon like the BD in double action.
http://www.pennbullets.com/44/44200rnfpbb.html