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Old 10-07-2014, 10:19 PM
Steve C Steve C is offline
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I have a short 2-3/4" barrel "Gestapo" Walther P1K and a standard 4.9" P1 that I ran a couple types of ammo over the chrono to see what the velocity loss was.

The results where as follows.

124gr Hot Shot 9mm:
P1 4.9" BBL average vel. 1,054 fps (5 shots)
P1K average vel. 952 fps (5 shots)
102 fps delta

Winchester 147gr USA JHP's
P1 4.9" BBL average vel. 949 fps (5 shots)
P1K average vel. 614 fps (5 shots)
335 fps delta

Hand load 115gr Rem JHP's, 6.0gr Unique, S&B once fired case, WSP primers:
P1 4.9" BBL average vel. 1,257 fps (5 shots)
P1K average vel. 1,139 fps (5 shots)
118 fps delta

So in my limited test with the guns and ammo that where used the heavy 147gr bullet lost the greater velocity of 335 fsp than the factory 124gr bullet or the 115gr hand load which only lost a little over 100 fps.

If I was selecting factory ammo for a short barrel 9mm it would be something with a muzzle velocity greater than 1,100 fps from a 4" or 5" barrel in either 115 or 124 gr or at least 900 fps in 147 gr.

Any of the Federal HST 124gr or Speer 115 and 124gr Gold Dots, Remington GS 124gr and HSP 115gr +P, Winchester 115gr JHP all meet that criteria. Don't assume the 147gr bullets will loose less velocity until you try them out of your pistol over a chronograph.

Last edited by Steve C; 10-07-2014 at 10:21 PM.
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