Diana Bandit, Artemis PP800 and Snowpeak PP800 information

I dunno if the pp750 could be included in the title as to me the trigger looks the same on Bagnall & kirkwood diagram. The pp750 has looks the same but uses a lever rather than a bolt action to cock.


Maybe someone who has both can verify this. I finally got my trigger consistently below a pound with some simple mods. Dunno if you guys have issues with gritty inconsistent triggers but my pp750 was horrible at first.


Allen

ThomasT said:

Hello everyone,

I am starting this thread to gather as much information ( facts ) about the above listed Pistols for maintenance, repair and modifying.

From all the information that I have gathered so far, it appears that these pistols are “exactly” the same in every respect. In other words, all parts are interchangeable and all aftermarket parts for one model will fit the other models. If this statement is incorrect please let me know.

The only difference that I have found so far is that the PP800R is a “regulated” pistol. The Bandit does not come standard with a regulator.

My Bandit with factory settings shooting JSB Exact 8.44gr gave these results on the Chronograph:
Start Pressure 200 Bar
End Pressure 140 Bar
Amount of Air used 60 Bar
High Low Average Extreme Spread Standard Deviation
868 812 850 56 16


My Snowpeak PP800R with factory settings shooting JSB Exact 8.44gr gave these results on the Chronograph:
Start Pressure 200 Bar
End Pressure 100 Bar
Amount of Air used 100 Bar
High Low Average Extreme Spread Standard Deviation
753 643 712 110 39

The Snowpeak uses all of the air just to shoot 8 pellets and the FPS is lower, the Extreme Spread is not good and the Std Deviation is terrible.

It looks like I need to remove or readjust the Regulator. I am looking for any and all suggestions on how to improve the performance of the Snowpeak.

Thank you,
ThomasT

Click to expand...

Hello Thomas, It is generally correct that the parts of the PP800R, Bandit, and other models in the same product line are interchangeable. However, it is always best to check with the manufacturer or a knowledgeable gunsmith to confirm compatibility before using aftermarket parts or modifying your air pistol.

As for the difference in performance between your Bandit and Snowpeak PP800R, there could be a number of factors at play. The difference in the amount of air used and the resulting lower velocity and less consistent shot-to-shot performance of the Snowpeak PP800R may be due to the regulator, or it could be due to other factors such as pellet choice, barrel condition, or other mechanical issues.

To improve the performance of the Snowpeak PP800R, you may want to try the following:

1. Check the condition and cleanliness of the barrel. A dirty or damaged barrel can cause poor accuracy and reduced velocity.
2. Try different types of pellets to see if one brand or weight performs better in your air pistol.
3. Make sure that the air pistol is properly lubricated and that all moving parts are functioning smoothly.
4. If you are confident in your mechanical abilities, you may want to try adjusting the regulator to see if that improves performance. However, be aware that altering the regulator can affect the safety and reliability of the air pistol, so proceed with caution and consult the manufacturer or a gunsmith if you are unsure.

I hope this helps. Good luck with your air pistol!

See if you can find any info on polishing a regulator. I've done the one in my fx crown, although it is a huma regulator. I run several of these in other guns. Basically I just polished the washers and made sure the piston was as smooth and flat as possible. Same for the piston shaft.

@Healthservices My pp800 and bandit both came with horrible triggers. With some polishing and manipulation of the set screws, they are both very smooth and crisp now. However, as is the case with both of mine. This tends to render the safety inoperable. Basically neither gun has a working safety now.

ThomasT said:

Hello @Healthservices

The PP750 is a different duck but it is a pistol and that is mainly what this thread is all about. It is an upgrade ( for lack of any other word ) from the Bandit/Artemis/Snowpeak and all information and modifications shared are surely welcome.

Click to expand...

Okay so trigger wise if the pp750 is a up grade I would assume it can't be all that great then. Like many sanding smooth or even better polishing the sear points help a lot with getting a consistent trigger.


Removing the old sticky grease and using something better also helps.
With sanding, starting with 400 I went all the way to 2000 and it got shiny and slippery.


But then I put a buffer on it and it turned into a mirror. I also did the same to the hammer since the cocking felt gritty too. Besides that is also a sear point.

This part too



I replaced the grub screws with stainless pointed ones (amazon) so it would have a fine point to hinge on. Dab some grease on the fine point tips before installing.

I polished the bottom of the sear too where the grub screw meets.


Have some washers on order to take the sloppy wiggle out. The ones i had were a little thicker than i thought at .5mm get something thinner like .3 mm the size should be 2.5 x 6 x 0.3 flat wssher.

Played with some springs and if you noticed the trigger is a single stage after you cock the handle. So I put a additional small spring above the grub screw at the trigger so it is easier to feel a small movement before you feel a point
where there is a second stage wall is, then PEW!



Made some adjustments with the grub screws and it actually feels decent now. Oh and made adjustments so the safety actually still works! But that little 1st stage spring above cannot be heavy at all otherwise the safety is non usable.

Hope this helps some and sorry I did not know that some of the pictures were blurry until after everything was installed

Allen

Here is a video with the trigger at its current state. Just filmed and uploaded. Much better than stock. And yes I was surprised that the safety still works. Not at first with the heavier spring. But right now it is pretty good.


Uncocked with out safety and with. Then cocked, safety on and then with safety off, playing with something smilar to a first stage then pull trigger a little more and bang.


Allen

And to clarify I think currently both the trigger springs are lighter than stock. I think I bought those on ebay or Amazon. The ones on ebay took a while but are cheaper than the Amazon ones. The spring size is 3mm in diameter and 10mm long. The factory diameter of the wire if I remember correctly is .45mm.


The factory long hammer Spring on the pp750 is 9mm in diameter. Which is the same diameter as a mk2 hammer spring. The wire size is 1.1mm and the free lengths vary but mine is 62mm

If you plan to shim the large spring get 6mm ID washers that are no larger than 13mm in diameter. 6mm id x 12 mm od seems to be a common washer size.


Allen

When and if you decide to remove the hammer to polish, change springs or othere work on the pp750 it's pretty easy and no need to air down. Remove the 2 screws that hold the handle here and jiggle the handle off be careful with the hammer Spring as you remove the handle.


Then unscrew the large screw at the back to remove the hammer and Spring. Once you can remove with your fingers keep tension on the screw and be careful not to let the Spring fly out.

After removing the Spring and hammer, you can remove the bolt first by removing the Allen from underneath the hammer in the slot.

Remember to clean and regrease when reassembling. On the pp750 to remove that assembly you need to remove the rear sight. Then take a magnet to remove this pin.


Oh remove the crossbolt that holds the plastic brackets too.

Afterwards you can slide out the assembly.



Allen

Excellent picture of the muzzle. Looks like SPA is still at it, chewing up the lands with a piloted crowning tool. Accuracy should improve substantially if you can chop off the damaged portion, face it off and apply a new crown.

The barrel of both my CR600W and CP2 (Diana Chaser) were the same way.

Before:


After:

Well they should being wads are more target/ match. But theres also cheap " flatheads" as well..

You're really doing well with that Bandit! I'm trying to resist, but I might just have to add one in .177. I have 5 SPA guns and I'm noticing that all of them shoot a variety of ammo well.

I was just mentioning on another forum how good these SPA barrels can be. All of mine are at least. I look forward to following your journey with the Bandit and the PP800r.

Sweet, so what do all those numbers mean exactly?




Allen