If you do the conversions his gun is still shooting low.
350 on a .25 BB is 1.42 Joules, which in .20 terms is 391 FPS, a M135 giving 391 FPS is very low. It should be about 420-440 FPS on the higher end for his setup.
320 on .25 is 1.19 Joules, which in .20 terms is 358 FPS..
120 should be giving 380 at the very minimum, closer to 400.
Re-chronoing with .20 BB's wont change the results at all unless he has a gas rifle.
And Scooter, it may just be the way the camera picked up the audio, but your gun sounds like the trigger post is about to break on you.
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