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.25 CO2 beast

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nunga View Drop Down
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    Posted: 20 Apr 2026 at 6:35pm
Just want to say a big thanks to jwabfrog for sending me the .25 barrel.

I will be starting my new project over the weekend. This will be a 30PFE .25 CO2 bolt action rifle Powered by a standard Sodastream 60L bottle. This will take a while as everything will be made by me (apart form the barrel) I have been planing and researching this for the last year and i am finally ready to start.


So watch this space!
2nd place HP springer - WFTF World Championships 2014



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-Ec View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote -Ec Quote  Post ReplyReply Direct Link To This Post Posted: 20 Apr 2026 at 7:43pm
30FPE - that'll hit HARD.  Any guestimate on how many shots you might get from a soda stream bottle?

Going to take some careful engineering to put it together.  Looking forward to seeing this project unfold.    Good luck with it all.
Regards,
-Ec
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nunga View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote nunga Quote  Post ReplyReply Direct Link To This Post Posted: 4 hours 21 minutes ago at 7:39pm
So ive been super busy lately but i managed to get into the garage today to make a start on this project.

I have done the research but now i will test this research to make sue i am on the right track before i even start making the parts for the gun.

So i am making an adapter to screw onto the end of the Sodastream bottle. It will have a thread on both ends. One to fit the Sodastream bottle and the other to have a threaded rod that will screw into the valve of the bottle to open it. Then i will tap a thread in the side to install a pressure gauge to make sure the bottle will give me the 800PSI needed for these calculations to get the 30PFE target output.



  


I will drill and tap the rest tomorrow with a bit of luck and test.
2nd place HP springer - WFTF World Championships 2014



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Ashman View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ashman Quote  Post ReplyReply Direct Link To This Post Posted: 55 minutes ago at 10:16pm
Holy sh*te there's mad ass engineers on here.
When you've finished that, any chance of building me a time machine?    Just a basic one. Nothing fancy.  Will need a dunny though.
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nunga View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote nunga Quote  Post ReplyReply Direct Link To This Post Posted: 29 minutes ago at 10:42pm
Ha ha, sure thing!
2nd place HP springer - WFTF World Championships 2014



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