Pauly's Technical Area - TX200 High Power

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TX200 High Power

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=1054
Printed Date: 05 Nov 2025 at 6:55pm
Software Version: Web Wiz Forums 10.14 - http://www.webwizforums.com

Topic: TX200 High Power

Posted By: nunga
Subject: TX200 High Power
Date Posted: 02 Aug 2024 at 6:13am

Does anyone here know the spring size for the TX200 HP spring? I have my old spring here in a box with a bunch of other springs and im wanting to put the HP spring back in the TX with a few mods but I cant remember which spring it is.

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2nd place HP springer - WFTF World Championships 2014

Replies:

Posted By: J-S
Date Posted: 02 Aug 2024 at 7:10am

From a forum: Air Arms TX200 Mk1/2 21 (20.75)od 3.25 wire diam 207 / 220 length 23 active coils

the MKIII high powder used the MKi/ii UK spring spec.. They may have had some collapsed coils, bit the OD and wire diameter above should be correct

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https://www.instagram.com/js_airguns/" rel="nofollow - J S Airguns
Air Arms TX200('s)
Theoben Sirocco
HW77
FWB 300s
Webley Patriot
One or two others...

Current projects:
Too many..

Posted By: nunga
Date Posted: 02 Aug 2024 at 7:43am

Cheers ill check it.

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2nd place HP springer - WFTF World Championships 2014

Posted By: nunga
Date Posted: 02 Aug 2024 at 12:23pm

So i found the spring. Machined up a new tophat and spring guide for it. She is putting out 860 fps with the original HP spring using JSB pellets 10 shots through the chrony. high of 861 and low of 859 so plus or minus 3 fps. so im happy with that. Tomorrow i will be setting up some long range targets and do some testing. Im going to be shooting out past 100 meters to see how she preforms. I will be setting up the chrony next to the target to see how fast the pellet is traveling at different distances right before it hits the target. This will hopefully give me some good data on how far out i can safely make a kill shot.

I will be making a video of my experiments and uploading it to you tube a little later on as i have remembered my password now and have access to my channel again after 10 years lol

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2nd place HP springer - WFTF World Championships 2014

Posted By: J-S
Date Posted: 02 Aug 2024 at 3:30pm

Sounds like pretty good velocity, and excellent consistency.
In .177 high power mine loved jsb heavies - 10.34gr.

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https://www.instagram.com/js_airguns/" rel="nofollow - J S Airguns
Air Arms TX200('s)
Theoben Sirocco
HW77
FWB 300s
Webley Patriot
One or two others...

Current projects:
Too many..

Posted By: RangerPete
Date Posted: 02 Aug 2024 at 6:35pm

Looking forward to seeing the results. Post pics.

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Walk quietly, but carry a big stick.

Posted By: Pauly5
Date Posted: 03 Aug 2024 at 1:35am

Good stuff, look forward to this.

Posted By: kruzaroad
Date Posted: 03 Aug 2024 at 1:43am

Sweet what's the utube channel?
When you got all the fps sorted at target you want to post them, the barrel fps in the pellet testing with the pellet so I can do some true bc calculations from shots fired please.
Oh icq No longer exists.

Posted By: nunga
Date Posted: 03 Aug 2024 at 3:32am

When did ICQ finish? I loved that platform.

My channel is called custom airguns

its funny how i havent been active on it for 10 plus years and i have 91 subscribers lol

There is a lot of old outdated videos on there so dont laugh at me please lol.

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2nd place HP springer - WFTF World Championships 2014

Posted By: Pauly5
Date Posted: 03 Aug 2024 at 3:56am

Ian, put up a link. There's a lot of videos on custom airguns.

Posted By: nunga
Date Posted: 03 Aug 2024 at 4:28am

Not sure how to link my channel page but this is a link to one of my videos you can click on my channel from there

http://youtu.be/dGzSpvnPa9s" rel="nofollow - http://youtu.be/dGzSpvnPa9s

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2nd place HP springer - WFTF World Championships 2014

Posted By: kruzaroad
Date Posted: 03 Aug 2024 at 6:22am

110 with a springer! All good. How much did that camera throw the hatsan of center. Very inventive.
Looks like I've got new challange at some stage, beer can at 115m.
Umm was that rested or free standing?
Suscribed and notifications on. 👍

Posted By: nunga
Date Posted: 03 Aug 2024 at 6:37am

that was me resting my elbow on a fence post standing. so kind of rested and free standing lol

I just completed my first test @ 100 meters. managed to get two shots through the crony to register. it is hitting the target @ 500fps (497.6) with 8.4gr pellets

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2nd place HP springer - WFTF World Championships 2014

Posted By: kruzaroad
Date Posted: 03 Aug 2024 at 7:16am

Sweet what's the muzzle volicity?
Dam that makes it a harder than sitting on a bag. Oh well be at 117m (that's where post is)
If you want to push it out further today with the tx200 I'd be keen on the challange. (assuming I can hit a can at 117m)

Posted By: nunga
Date Posted: 03 Aug 2024 at 8:33am

That video was taken over 10 years ago. We are at a different address now. 100 meters is about all i can safely shoot at without annoying the neighbors. But i shall range find some different angles and see if i can shoot from up the hill over the roof of my house into a tree or something lol.

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2nd place HP springer - WFTF World Championships 2014

Posted By: kruzaroad
Date Posted: 03 Aug 2024 at 9:14am

Where there's a will there's a way😊

Posted By: RangerPete
Date Posted: 18 Aug 2024 at 7:37am

Nunga, your pellets are hitting at 100m with 4.64FPE.

Thats very good, more than the ballistic calculator I use says it should have 👍🏻
In my experience that is enough to cleanly kill a rabbit, if you can hit it in the heart, lungs or brain 👍🏻
Personally I have found my limit with my air rifles and the 11.2 power scope I use, my limit is in the 90ish yards, I won’t take a shot past 100y.
My .177, which also shoots 8,4gr JSB but at a mussel velocity of 813fps, is down to around 3.6FPE at 100y, which I feel is the absolute minimum required for a clean kill on a rabbit, so my equipment and my self have both reached our limits at 100y.

Of course with a higher mag scope and more powerful rifles, or PB’s it’s a different story, but with my little .177, I’m happy with my self imposed hunting range of under 100y

Your TX has a muzzle energy of 13.8FPE, and if you still retaining 4.6FPE at 100m, you should still enough energy for a clean kill out to…? 120ish m???
Just my thoughts 😉

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Walk quietly, but carry a big stick.

Posted By: nunga
Date Posted: 18 Aug 2024 at 9:12am

I got the TX mainly for field target shooting not really for hunting. I have my crosman .22 for that. The TX is very heavy so its not my first choice for lugging it around paddocks all day lol but yeah 120ish might be the limit for a clean kill

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2nd place HP springer - WFTF World Championships 2014

Posted By: nunga
Date Posted: 22 Oct 2024 at 10:38am

So since i have registered myself in the high power class this years Nationals I thought i would put a few rounds through the old TX with the high power spring in, get the zero sorted at 30 yards and check my click chart which i haven't used for 3+ years. First was zero @30. Bench rested. She is pretty much a nail driver at that range. put 3 shots through the same hole. Went to 55 yards.. my chart said i needed 4.7 or 39 clicks. so i put 3 shots down and they grouped around a 2 dollar coin. So i was happy. Went to the other end of the scale and shot at 10 yards. chart said 8.5 or 69 clicks...This is where the wheels fell off. Shots landing 3 inches low. Am i a rev out?...wind it up one full rev and now its shooting high...This was the case for all the distances from 10 to around 20 yards. then again from 40 out to 50. It was just all over the place.

First thing i noticed was my sidewheel. I have a tape on the ground to measure the distances and when i look at my marks they are off. Im thinking my eyes are not as good since the last time i used the gun and they are focusing different. I put my reading glasses on and it made it a little better but still not as accurate as it was.

Second thing i noticed that the gun when firing has a loud twang to it now which it didnt have before and the screws have come lose on the hamster as well.

So i pulled it apart. the Top hat had broken as well as the spring guide. So i machined up a new top hat and spring guide.

I made a new hamster but this time i incorporated it with the screws that hold the TX to the stock so it ties it all in with one large bolt then the second bolt just goes into the stock.

Ive put a few rounds through it and it is sounding really nice again and she is plus or minus 3 feet per second over 10 rounds through the chrony.

Run out of time to do any more today so tomorrow i will re mark the sidewheel with new distance marks and start all over with the click chart.

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2nd place HP springer - WFTF World Championships 2014

Posted By: kruzaroad
Date Posted: 22 Oct 2024 at 10:49am

Don't envy you.
I'll be resighting and relearning all my hold points once the shims go under the scope.
What qualifies as high power in NZ?
Is it over 12fps?

Posted By: nunga
Date Posted: 22 Oct 2024 at 11:12am

Yeah anything over 12fpe or over 800fps with 8.44 pellets

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2nd place HP springer - WFTF World Championships 2014

Posted By: Pauly5
Date Posted: 22 Oct 2024 at 5:10pm

When I was using my 97k for FT, I tried fixing the hamster with the main stock fastening bolt. It certainly changed poi, and the tension it was torqued at did too. I ended up making a whole new stock with a deeper forend, but what I did learn was that, not to change too much stuff around with a springer as it all has a part to play.