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Old August 5, 2014, 01:18 PM   #8
RickB
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Join Date: March 1, 2000
Location: Boise, ID
Posts: 8,511
Quote:
Someone ran some 125gr Buffalo Bores and was getting around 1800 fps in a Coonan,
I've seen some chrono results of 1500 from a 4" revolver, so unlikely that you're going to see much more than that from a 5" auto. The auto barrel includes the chamber, so a 5" auto is effectively the same as a 4" revolver, with a bit of pressure loss from the gap.
You can drive a 135gr bullet at well over 1400 from a 5" 10mm, so not much to choose.
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