I have a 24" SS R92 in 44mag that seems to have a too narrow gap between the guides and the slightly fatter loaded cast bullet rounds will not easily pass between the guides. Measuring with the use of minus pin gauges the distance between my guides are .4518" (.452" minus gauge). Reaching down in there with digital calipers I get .4515", but angle and depth probably make caliper use a best guess only measurement, but I'll take any measurements I can get.
The guides I'm talking about are on either side and above the ramp. Thanks in advance for any measurements provided.