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Posted: 7/16/2003 12:00:46 PM EDT
FYI - I chrono'ed Winchester Q3131A (55 grn) out of my BM 16" upper yesterday.

My average FPS was approx 3120. For all of you three gunners, that equates to a 171.6 power factor - easily making the required 160 out of a 16 incher.
Link Posted: 7/16/2003 3:39:18 PM EDT
How many rounds? SD? -- Chuck
Link Posted: 7/16/2003 5:21:36 PM EDT
chp5, just for clarification, do you have the full 16" bbl (BM patrolman's carbine) or a 14.5" bbl + 1.5" brake (BM M4gery)? thanks ar-jedi
Link Posted: 7/16/2003 6:01:58 PM EDT
Guys, I chrono'ed fifteen rounds. Low FPS was about 3080, high was about 3150. Approx average was about 3120. This is an "eyeballed" average. In any event, I'd have no problem making a 160 power factor for IPSC 3 gun matches. I have a true 16" BM upper (not a 14.5" with a 1.5" brake).
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