I have not specifically tested the "short barrel" yet, but I did try the regular Speer Gold Dot's (+P) in both a 2" and 4" barrel by shooting into a line of water jugs. The 2" expanded, but not 100%. As you would expect, the 4" barrel got the velocity up and the resulting bullet shape was much more expanded. I would suspect that this same round designed for a short barrel would expand fully from a 2" barrel based on my two tests with the non-short-barrel rounds. Actually, I would like to find a box and try those short-barrel rounds in my 638 this fall. Later, B
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