Then you have to actually run it to see if it feeds 100%. Theoretically, that would be the best col for accuracy. Then see if it drops into the chamber completely and falls out by itself.
#SUBSONIC 9MM JHP FULL#
For the rn, try measure some factory ball and duplicate it.Īlternatively, you could try seat the rn way out until it won't fit the mag, then push it in till it fits comfortably and you can fill the mag to full capacity. The COL for hp and rn will be different obviously. If you go down too much, it might get dirty and/or malfunction. Sure you can tweak a little, though 5.5 cfe is pretty much max.
It would be interesting to see if the same results happen from some other carbines. None of the test loads came close to going supersonic. But I had fun shooting some ball that I loaded this morning.Īnalyzing the results, I think some of the inconsistent results might be due to loose chamber dimensions.īeyond that, I don't really know what's going on. UNSURPRISE- the carbine hates hollow point ammo. SURPRISE#4- Velocities in all tests showed a much higher amount of deviation than pistol tests.
SURPRISE#3- The factory rounds did not speed up very much at all. SURPRISE#2- My reloaded ammo sped up much more than the factory rounds SURPRISE#1- The 1st shot of each test string was consistently lower in velocity than the rest. I fired the same lots of ammo that I tested 2 months ago. The test gun was my Marlin Camp-9 carbine with a 16 inch bbl. What if I went from a stock glock 4.4 inch to a 16 inch carbine? In the past, I saw dramatic increases in velocity from pistol barrels. There was a short waiting list.Īnyway, as a part of this project, I wanted to see if subsonic pistol ammo stayed subsonic out of a long bbl gun. Probably due to people trying out their new gun show toys. I finally got out to the rifle range today.
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