I was referring to the 5 1/2" standard Redhawk, which is the 5004: http://www.ruger.com/products/redhaw...eets/5004.html
Last night I looked that same model up on Gunbroker and I am seeing prices in the high $700 to mid $800 range for this revolver, NIB.
Most of the Ruger revolvers are a bit tight for .432" boolits and that's what you really want to size to, but you may be okay sized to .431" in the Redhawk because afaik they make the RH cylinders on different machinery than they make the BH/SBH/NMV cylinders and I think they are a little more consistent and even in throat diameters than the single action models. It really depends on the individual gun because as tooling wears and gets changed out at the factory, this directly affects the size of the cylinder throats. They use multi-chuck cutters that ream more than one throat at a time but they don't necessarily change out these cutters simultaneously, afaik they change out the worst ones as they wear so it's anybody's guess what the throats will measure, and this doesn't matter if it's a new gun or a used gun.
Buying a Ruger that needs cylinder throats re-sized for use with cast boolits is not really a bad thing at all, for less than the price of a pair of China made grips, we get to fine tune the throats to an exact measurement for a specific boolit and the results are well worth the small investment, and the improvements will last the lifetime of the gun so not a bad deal at all for a cylinder to be adjusted to very exacting tolerances.
I shudder to think that if Ruger had a custom shop, how much it would add to the cost of a new revolver to be ordered with specific size cylinder throats.