Minimizing effects of("best load with") large throats

[inthebeech]

My new 44 Special flat top Blackhawk has a .4294 groove and .433 throats.  All throats are within half a thousandth so they're consistent but about two thousandths too large based on current thought.  I am initially experimenting with soft (BHN=10) 200 gr RNFP at .430.  So I guess my question is basically where is the optimum balance regarding bullet diameter?  As I go up in diameter and force the grooves to swage it down further (bad) but get closer to a snug fit in the throats (good) what is the best diameter to settle in at?  If useful, I intend to continue to shoot exclusively mild-moderate 44 Special loads (700-900 f/s) but I am not partial to bullet style, weight, or hardness.  And of course, by 'optimum' I am referring to highest degree of accuracy.  Also note that, as much as possible, your recommendations should fit in to components and sizes that are available for purchase; I do not cast my own stuff.
Thanks,
Ed

[Veral]

  For starters, you are shooting yourself in the foot by not casting your own, but so be it.  If you don't or can't or don't want to you can still get some pretty good performance.
 
  Have you tried the Hornady swaged SWC's?  They will be undersize but are very soft and slug up easily.  I strongly suspect that these will provide you with the lowest shooting cost, and probably as good accuracy as you'll get without paying for premium hand cast.  Try Hodgen Universal powder and play with the charge till accuracy peaks.  At peak accuracy the  soft swaged bullets will be swelling up to a precise fit to the throats which will seal off blowby and should prevent leading problems.  The upset will only be at the base so they will be leaning a little when they hit the barrel, a condition that limits accuracy.  Perhaps a more accurate way to say that is, 'it's a condition that determines accuracy'.   The more lean you have the poorer accuracy.
 
  For the very best accuracy, bullets should be fitted closely as possible to the cylinder throats, which starts them into the barrel straight.  The barrel can then size them back down straightest.