Nitro Piston Conversion Stoeger X20
Printed From: Kiwi Airgunners
Category: Technical
Forum Name: Pauly's Technical Area
Forum Description: Technical information, Modifications and DIY projects are all in here
URL: www.kiwiairgunners.co.nz/forum_posts.asp?TID=524
Printed Date: 23 Nov 2024 at 2:55pm
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Topic: Nitro Piston Conversion Stoeger X20
Posted By: Andy-A
Subject: Nitro Piston Conversion Stoeger X20
Date Posted: 27 Oct 2020 at 6:30pm
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Okay guys, just opening up a (very hypothetical) subject. If possible I'd like to pick the brains of you highly knowledgeable air rifle Jedi Masters. I currently have a Stoeger x20 .22 (2 years old) I like it but it's noisy, not at the firing end, I think I've got that covered with a suppressor, it's at the mechanics end. This is what it says on the box  this is what I believe it to look like inside (No 3 looks like a big spring)  And this is what I've found on Tinterweb :-) http://www.ebay.com/itm/GAMO-KRAL-STOEGER-GAS-RAM-NITRO-PISTON-METAL-TRIGGER-AIR-RIFLE-GUN-SPRING-X20-/163421534992" rel="nofollow - http://www.ebay.com/itm/GAMO-KRAL-STOEGER-GAS-RAM-NITRO-PISTON-METAL-TRIGGER-AIR-RIFLE-GUN-SPRING-X20-/163421534992 I see there's an earlier thread, going back a few years, on the subject. Question: do you believe this would make a significant difference to the sound of my X20. (or be an improvement all round) If so, is it major surgery (having no bespoke tools, like spring compress thingy etc) to swap it out. Also would it affect the power and accuracy of the rifle (for better or worse) Thanks in anticipation and over to the 'font of knowledge' :-) Cheers, Andy
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Replies:
Posted By: dvlnme
Date Posted: 28 Oct 2020 at 6:49am
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only one i know who does this conversion is Alex Magon of Mag Air ,but Ron Young proberly does it as well,you can change the power etc with most gas ram guns by changing the pressure inside the gas ram,think this needs a a special tool or pump or something,dont know much other than that,just what i remember from talking to Alex some years ago,look Magair up on line and give him a call,call Ron as well both will be able to give you more info that i mate. cheers mike
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Posted By: Andy-A
Date Posted: 28 Oct 2020 at 12:26pm
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Thanks for the feedback Mike, I'll keep you posted. Cheers Andy
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Posted By: Andy-A
Date Posted: 28 Oct 2020 at 2:00pm
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Oh well, just goes to show how little I know! I opened up my Stoeger and guess what..A gas ram I believe :-0  Oh well, I'll just have to live with it for now, perhaps upgrade when the finances permit :-) Cheers, Andy
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Posted By: dvlnme
Date Posted: 28 Oct 2020 at 3:00pm
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so the box was right eh!!dont know there much you can do bout the noise other than just learn to ignore it,as pellet proberly left barrel anyway time you here the noise,i guess dosnt really matter if rifle shooting accurately. cheers mike
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Posted By: Andy-A
Date Posted: 28 Oct 2020 at 3:20pm
Haha, correct, I'll just have to give Lola some brandy to settle her nerves :-) A.
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Posted By: Billbobnz
Date Posted: 28 Oct 2020 at 6:04pm
| The noise could be caused if there is a small gap between the piston and the ram, if the ram in a couple of thou too short it can cause the piston to rattle and bouce at the end of the firing cycle. If this is the case you could shim it. Or you have something broken in the ram/piston |
Posted By: Billbobnz
Date Posted: 28 Oct 2020 at 6:05pm
| But on second thoughts, there should always be tension on the piston..... |
Posted By: dvlnme
Date Posted: 28 Oct 2020 at 6:51pm
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see there you go finally someone who knows bout gas rams. cheers mike
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Posted By: Andy-A
Date Posted: 28 Oct 2020 at 7:20pm
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Thanks again guys, i'm not too sure what it would sound like, so I'll leave well alone for now, and brush up on my air rifle maintenance skills :-) Perhaps I should record it and put the sound file up here so those with 'the ear' can listen :-) Cheers for the feedback A.
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Posted By: Billbobnz
Date Posted: 28 Oct 2020 at 9:04pm
| I'm still not sure though, only way to tell is to pull it apart. A gas ram will obviously have a limited travel distance so that's the only thing I could think of. You can make yourself a spring compressor with a sash clamp or what ever they are called |
Posted By: Andy-A
Date Posted: 29 Oct 2020 at 8:22am
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Cheers, I'll work on honeing my limited air rifle maintenance skills first. The thing is working well , apart from the noise, so I'll apply the " if it ain't broke don't fix it " rule for now ,:-) |
Posted By: dvlnme
Date Posted: 29 Oct 2020 at 4:54pm
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of course the other option is to keep fixing it til is broke ha ha cheers mike
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Posted By: Graywulf
Date Posted: 30 Oct 2020 at 12:25am
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It may not be much help as my rifles a Hatsan .25. But they are a 'high power' gas ram. What I 'think' is not so much the sound of the ram operating, but you don't get the 'aftershocks?' as such as there is from a spring powered. Even with a suppressor on the rifle, there is still a fair 'pop' to be heard as the slug exits. I read that this same gas ram is used by Hatsan in all their calibre's.. the .177 will go 'supersonic'. Not knowing what grain slugs you are using, but if fairly light are they getting close to, or doing that? (supersonic).
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Posted By: dvlnme
Date Posted: 30 Oct 2020 at 7:26am
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you can soon tell if they go supersonic evan with a suppessor fitted you get a very distinct crack,my 177 pcp is set up for 10.34/10.60 gr pellets at minimum for 980fps and 22 fpe but is better with heavier 15/16.4 grain pellets as far as sound goes/havnt chronoed it with lighter 8gr pellets coz they leave suppressor with very loud crack to them,so assumed they are supersonic at muzzle,dont understand why many springers and gas ram rifles are being advertised as capable of 1200fps,when thats bassically unusable with pellets,obviously these rifles are intended to use heavy pellets not the usual 7.5/8.2 gr pellets and should be advertised as such,obviously they are being marketed to first time buyers who velocity means more power and dont know the difference,gamo made big deal out super light weight alloy pellets getting these velocitys but neglected to say accuracy would be a problem when these pellets dropped thru sound barrier,these super light weight pellets do have a place as they are good way to boost velocitys from low powered guns and get flatter tradjectorys but are essentually useless from higher powered guns if going supersonic,tho havnt actually shot pba pellets at supersonic velocitys yet to see if they are accurate until they drop thru sound barrier,but they could very well be accurate until they do drop thru sound barrier,has anyone tryed this test???would be interesting to find out i guess. as most us know very well accuracy is key with airguns as evan the more powerful airguns dont come evan close to a 22 rimfire firearm in 177/22 cal,just a matter of finding the heaviest pellet that still gives decent velocitys and best accuraccy in my experience when comes to hunting or pest shooting in guns that dont have adjustable power settings but having said that i am still constantly amazed at just how well even a little 177 pellets can be a very effective small game hunting airgun out to quite considerable distances if its accurate. cheers mike
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Posted By: Andy-A
Date Posted: 30 Oct 2020 at 8:15am
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thanks guys, I'm getting more ammo today. I bought a couple of times of vmx 14.66 ( I think :-)) Not working well with the CR600W.but good enough with the Stoeger. I'll just keep experimenting. I'd like to tame the CW600 though and get accurate pellets for it. Cheers for all the good advice. No substitute for experience.. A.
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