Air gun and pellet testing

[robjob]

For you data geeks out there...
Pellet and gun testing.
Walther LP500 (2019)
Hamerlli AP20 (2015)
Pardini K12 (2013)
Steyer LP10 (2012)
Test protocol:
1) 17 yards to help distinguish differences
2) Guns clamped by cylinder in 6" wilton vice mounted to a 700 lb work bench. 3d printed fixture to hold the cylinder and provide a rod for consistent trigger activation
3) climate controlled room
4) velocity collected on a Lab Radar chronograph
5) 10 shot groups for all gun/pellet combinations
6) group size measured edge to edge of the farest shots in group with a Mitutoyo digital caliper. 0.177" was subtracted from this measurement to represent center to center distance which is the data plotted
7) group size is in inches, velocity is ft/sec

[BobGee]

Were all the pellets the same size and, if so, what was that size?

If the pellet is the right size for the barrel, the head will “skate” along to top of the lands while the skirt will expand into the grooves and provide the seal and spin. A too large pellet will be slower as the lands engrave the head. I think the Pat head size can have a significant impact on precision.

Bob

[robjob]

All were 4.50

[Rover]

Very nice effort!

I guess I'd be buying the JSB pellets (tops in my testing), unless I was using a FAS 6004. Then it would be the RWS Lite for the extra speed.

If you're feeling ambitious, you might try the same tests with different lots of the same pellets. Also, you missed my cheap-ass favs.

I like the Mitutoyo, too.

[PeeWeeDaddy]

It doesn’t matter.
What pellet/bullet performs well in one pistol/rifle is no indication how the same pellet/bullet will perform in a similar rifle/pistol.
You must test yourself.

[Azmodan]

as i posted in another thread, i tested different pellet brands: https://youtu.be/RhoGraByA9o
and than the same brand (JSB) with different sizes and weights: https://youtu.be/D0vfqFaWa0w

the results are relevant for my P8X, but other P8X owners might relate. other pistols should do their own tests, but the setup is quite easy and cheap