I just got one of the 4.2" barreled Redhawks and really like it. I haven't had time to take it out and shoot it, but have been doing some casting and handloads. One of the things I was able to do was measure the cylinder throats with some (USA made) gage pins I have. I could get a .431 pin into all the chambers but not a .432 in any of them. This tells me they are pretty consistent and none are smaller than .431 or as large as .432. This is a good thing, no?