Diana Bandit PCP tuning

[Chickenthief]

So i got myself a neutered (156m/s~510fps with 7.8grain pellets) Diana Bandit in .177 from Germany (they have a 7½joule~5.5fpe rule for unregistered airguns).

Took a 2mm~47AWG drillbit to the brass transfer port and got 178m/s~584fps (original fitted a 1.2mm~56AWG drillbit).

Same drillbit down the valve body (standard fitted a 1.4mm~54AWG drillbit) and now it's a frisk 223m/s~731fps. Now were cooking with gas.

Mine came fitted with a silencer from the factory and for some strange reason they turned the baffles 180degrees the wrong way!

Nice silencer and it does a fairly decent job regarding sound muffling, but it was installed with lots of Locktite so tools was used to tear it off the first time.

And the stock, man oh man! That thing fits a ham fisted gorilla not my small greasy mittens. So some preliminary sanding and in the near future some range time.

Fitted a 40mm red dot sight and now the magpies better beware ;-)

 

[socaloldman]

I love your willingness to go for it. Send pics of the Magpie Pie!

 

[Long_Gun_Dallas]

Hmmm I'm curious. Mine was doing 850 fps.... All I did was polish the turn in the barrel frpm the TP. I dialed mine back to about 630 fps with a regulator. And cut a lot of weight off the hammer/weakened the hammer spring. The valve body, I also cut back significantly to provide room for the regulator. I tossed the plenum I was supposed to use and cut an oring seat into the valve body face (and hogged out the body) . Gets about 50 shots @ 630fps Can see I did a ton of cutting on the grip as well. Easily the most fun gun I own period.

 

[Long_Gun_Dallas]

Also, try flipping the last three baffles the wrong way you'll be surprised how much quieter it is 

 

[hplau]

Hi Chickenchief

I also got a bandit pcp here in dk and would love my power for ratting with hades 0.177 pellets.

Did you bore TP, vale, brech and barrel to the 2 mm from 1.2-1.4 mm standard? Or did you go even higher? Did you do any mods to the valve and hammer springs?

Greetings

 

[Arbralouve]

Hi, unfortunately I managed to cock twice my Diana bandit. Any idea how to remove the magazine without braking it?

 

[Jarnold]

Hi, unfortunately I managed to cock twice my Diana bandit. Any idea how to remove the magazine without braking it?

It should be a pellet Stuck half way in the Mag half way in the barrel. Try going with a rod trough the barrel and push the pellet back in the mag.