So I just got done installing some new Wolff springs in the Bisley convertible. I put in a 30oz trigger spring and a 14lb hammer spring. Man, what a difference that made. Action is way better and the trigger went from 3 3/4 pounds to 1 3/4 pounds. That's the best $22 I have spent in a long time.
I heartily recommend the 30oz. trigger return spring, but I leave the stock Ruger hammer spring in there. I take the hammer pad down which removes most if not all of the creep, you have a safe trigger that breaks a lot cleaner than stock, and the stock spring has shorter lock time than a reduced spring does.
waco if you have uneven throats, I would have them honed to consistency which in some cases a reamer cannot do, because Ruger cylinders have widely varying hardness and quite often the same cylinder will have throats that ream easier than throats on the other side, because of the variance, and the throats that ream easier will finish larger than the ones that are hard to ream. This is the sole reason I went to the Sunnen hone for cylinder throats, because I could not turn out cylinders with consistent throats with just a reamer and a bit of abrasive to clean up tool marks.
That's a really nice looking Bisley, what does the forcing cone look like?