.40 S&W SD Rounds Data -- Interesting?

[Tyerone]

Beautiful day in MI today so I decided to not only check reliability of a new load for me, but also fired up the PRO CHRONO Digital.

All ammo and magazines were temperature soaked before shooting.  All velocities were measured 9.0 feet from muzzle to center point of the Chronograph.  Velocity Data captured in Feet/Second

52 deg F, 32.5 Inches Hg, 45% humidity
40 S&W Winchester Ranger Bonded, 165 gr (Brass Case) government overrun:
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Beretta 96A1, 4.9" Barrel:  10 Shots:
1017  High
974  Low
994  Avg
43  Extreme Spread
13  Std Deviation
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Charter Pitbull Revolver, 2.3" Barrel: 10 Shots:
922  High
877  Low
905  Avg
45  Extreme Spread
14  Std Deviation
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54 deg F, 32.2 Inches Hg, 45% humidity
40 S&W Federal HST, 180 gr:
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Beretta 96A1, 4.9" Barrel:  12 Shots:
1010  High
955  Low
974  Avg
55  Extreme Spread
15  Std Deviation
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Charter Pitbull Revolver, 2.3" Barrel: 15 Shots:
982  High
897  Low
946  Avg
85  Extreme Spread
23  Std Deviation
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Additional Notes:
Charter Pitbull (non-adjustable) sights are well regulated for WIN RANGER, 165gr as I hit the gong at 12 yards every time.
Rarely hit gong with Charter shooting with HST at 12 yards.  Didn't try to alter aim as more concerned with Chrono measurements.
Felt recoil from HST through Charter was substantially more significant!
Beretta smoked the gong nearly every time; could not really feel a difference in recoil between the two.
Were I to eliminate the first and last Beretta Shots (the 2 highest data points), extreme spread and SD would likely decrease significantly.

[Tyerone]

Maybe I'm just ignorant when it comes to revolvers which is why I thought the data was interesting.  I was fully expecting the velocity of the heavier round to DECREASE through the revolver as it did in the auto.  The data made me think about it.  Perhaps the longer bullet or resulting malleability allowed for less blow by (gas pressure escape) as it jumped the gap from the cylinder to the barrel.  Probably old news to those experienced here, but an eye opener for me.

I've noticed obviously experienced auto pistol shooters short stroking the new snake revolvers for instance on youtube.  They've been so ingraned to shooting to reset, they forgot how to run a revolver!  I hate that phrase, running a firearm, so I'll run away for now until next!  Talk to you later, Tye!