Artemis pp700sa hammer and other adjustments

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MrP

MrP

Member
Apr 29, 2020
1,662
957
New Lebanon, NY, USA
I am waiting on a chronograph to arrive today. I’ve also been searching through discussion threads on this gun but having a hard time finding reliable information. I also enjoy discussing things when I get a chance so if any of you have any experience on adjusting the hammer spring preload on this air pistol I would greatly appreciate it. I know each gun will be different what I’m wondering is for any of you who have made some adjustments:

I am waiting on a chronograph to arrive today. I’ve also been searching through discussion threads on this gun but having a hard time finding reliable information. I also enjoy discussing things when I get a chance so if any of you have any experience on adjusting the hammer spring preload on this air pistol I would greatly appreciate it. I know each gun will be different what I’m wondering is for any of you who have made some adjustments, if you can share your experience as far as the following questions go:

How far did you tighten or loosen the nut that controls the spring? Did you see any consistent effects on the velocity of pellets? Does it seem like it was mostly wasted or increasing pretension actually translates into some higher energy shots?




 
The regulator screw is very difficult to turn. I can’t find an Allen key that seems to fit snugly. But I am able to adjust it and seeing it effects. The hammer springs effect is harder to understand. Seems it be kind of unpredictable. I got high speeds at both low and high spring preload.



update:



I’ve managed to turn the regulator a couple of quarter turns clockwise. The velocity increased by about 100 FPS and I’m now shooting 7.4 grain crossman pointed pellets at 820 FPS or so. Can I turn the regulator screw a little further or have I gone far enough?



Is this about the best I’m going to get out of this thing?




 
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Your quest for power may eventually result in a pistol that's harder to shoot accurately and may also result in a very annoying loud pop at the breech.

I have many gen1 and gen2 set at different hot rod power levels and the easiest to shoot accurately is the one I never adjusted the power on. It is also noticeably quieter.
 
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Thanks your advice is appreciated. 


Right now I’ve cranked up the power a little bit by adjusting the regulator. It is slightly louder but I find the accuracy is somewhat better right now. At least with the pellets that I’m shooting.


If I could get a 25% discounted 1701P from Crossman I would get it. I’m on their list to be emailed when it gets back in stock.

If it seems like I’m being stupid and ignoring your warnings, well... I got this gun specifically because of the ease of adjustment. So I don’t really care if it’s a little loud or if it’s not as accurate, I’m not a great shot anyway and the noise doesn’t bother me because I’m not hunting or needing to be silent. If in the end I tinker around for a few hours and reset it back to the stock setting, I will still be glad because I will have learned about adjustments and how to do it and I will have had a little bit of fun. If I push too far in the thing becomes pretty much horribly in accurate and no fun to shoot no big deal. I will get a 1701P someday. 




 
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I'm just concerned after you told me your friend took his apart for unknown reasons that resulted in a leaking gun that he really doesn't know how to fix. If things are MAXED out something us bound to give the all. I want you to enjoy yours being problem free that's all. I have many of those as well as many Crosman 1701ps so I can't be biased.
 
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You will find it much easier to adjust the regulator if you take a good fitting 4mm allen and relieve the entire diameter of the short end, leaving only the terminal 2-3mm working end undisturbed to engage the head in the pistol. There is a picture of this somewhere but I can't recall location. This allows freedom of movement of the allen key and makes fitting it into the pistol for adjustment much easier.
 
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I've got a question for those of you who've messed around with the PP 700 before. I want to try a larger transfer port. I have a larger breech block designed for .22 caliber (from Jefferson State Air rifles) and it has a larger transfer port. It's about .210" diameter. The port for .177 caliber is about .173"


If I want to get more power should I slightly enlarge the .173? Or is it OK to actually just install the .22 cal breech on a .177 barrel? Is this too large an opening? One person suggested no larger than 3/16 diameter when enlarging the transfer port to shoot .177
 
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I've been talking to the owner of Veradium Air and he has been doing some custom tuning on the 700 and has claimed to be getting superior performance/speed from some fairly heavy pellets.

His position is the 700 has some serious power increase potential, but requires a shop fix so the pistol can be properly modded with his tools and skill.

Right now he's cleaning up and tuning the 750's Wes sent him for modification and cleanup for U.S. buyers. I felt $85 was a cheap investment in a $300 gun to ensure it is a max performer upon receipt. I don't like to work on pcp guns. I prefer it be done by someone who knows what they are doing.

My 700 is in his hands at this time, and will get a thorough power upgrade as soon as he finishes modding the U.S. 750 pistols. I intend for the 700 to be my slug carbine!

If you want some serious power increase, I'm speaking of 800 to 900 fps, you might want to visit his web site, or give him a call. His number is listed.



Regards,

Kindly 'Ol Uncle Hoot
 
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