Well I did get some M1152 to chronograph in a few average real world guns. All semi-autos; going to test it in a couple revolvers later.
4" bbl. = 1258 FPS.
4.7" bbl.= 1308 FPS
5" bbl. = 1319 FPS
16" Bbl.= 1448 FPS
I was skeptical of the advertised 1320 FPS, but no longer. It is the fastest 115 grain ball ammo I can recall chronographing. I experienced no malfunctions in the limited testing I did.
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NRA Life, COTEP 640
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