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PostPosted: Wed Oct 10, 2018 11:55 am 
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Joined: Thu Feb 22, 2018 8:00 pm
Posts: 13
I recently traded into a diana model 24 that seems to have been detuned for sub 500 fps in Canada it currently gets around 475-480 fps with JSB exact pellets and for some strange reason it gets lower velocity with lighter pellets like h&n finale match pistol or crosman hollow points and destroyers which are both lighter than the jsb pellets. In any case I would like to get the gun back up to it's full factory spec around 575 fps ( if I can get a bit more without adversely affecting the shootability it wouldn't hurt my feelings but I would like to be able to shoot the gun as it was designed) my question is what would be involved in restoring this air rifle to full power ? The spring in it now has 28 coils and very light preload so I'm thinking a spring swap might do it. If so where might I find a proper spring? And would shimming the spring be an acceptable fix? Also for those who will bring it up, yes I have my RPAL so there are no legal issues with me bringing this gun above 500 fps


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PostPosted: Wed Oct 10, 2018 5:30 pm 
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Joined: Wed Jan 04, 2006 5:50 pm
Posts: 695
Location: Nova Scotia
full power spring

https://www.airgunforum.ca/store/produc ... cts_id=110


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PostPosted: Wed Oct 10, 2018 10:54 pm 
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Joined: Thu Feb 22, 2018 8:00 pm
Posts: 13
Thanks for the link, is the spring the only difference between sub pal and pal rated Diana's?


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PostPosted: Thu Oct 11, 2018 2:51 pm 
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Joined: Wed Jan 04, 2006 5:50 pm
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Location: Nova Scotia
some reading on the D24. Spring change discussed

topic18223.html

topic2374.html


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PostPosted: Thu Oct 11, 2018 8:11 pm 
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Joined: Thu Feb 22, 2018 8:00 pm
Posts: 13
I have ordered the full power spring . Hopefully the gun will still be as smooth to shoot with the new spring. Given that it is the factory spring and not an aftermarket spring designed to push the envelope I'm thinking it should still be a nice shooter with just a bit more velocity than the detuned spring


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PostPosted: Thu Oct 11, 2018 9:58 pm 
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Joined: Mon Sep 05, 2005 10:55 pm
Posts: 6796
Location: Rocky Mtn Hse Alberta
Is a Vortex PG2 kit available for that rifle? If so then you have smooth!

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PostPosted: Fri Oct 12, 2018 12:24 pm 
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Joined: Thu Feb 22, 2018 8:00 pm
Posts: 13
I don't think vortek makes a tune kit for the 24 in fact I've been having problems finding any info at all about it. I guess it was never really sold in the US and is generally considered a youth rifle so not worthy of much attention elsewhere.


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