I recall reading a post or two from someone who had the right knowledge set that that cylinder throat problem went away about the same time as pinned barrels in the 25-5. Others have posted testing methods using bullets of known size, just dropping them down the cylinder.

While what I really want is a 5", non-fluted 25-7 or 25-9, that's probably somewhere closer to delusion than fantasy. If I were going to get a 4", the suggestions made above would be on the right track.

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NHI, 10-8.