Hello everybody, I'm newbie here but been lurking on the forum for months and thought that it is time to introduce myself

Here's what I have so far:
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1250 in .25, the forestock has been epoxy glued to the stock making it one piece,the "claw" holding the forestock to barrel has been removed and the stock has been sanded under the barrel to make it real free float. Also added a Harris-type bipod and swivel mount for it.

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Installed adjustable buttstock and filled the buttpiece of the stock with sand to add some weight and balance the gun.

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Made a bigger bolt and longer bolthandle "8-ball" for easy cocking. Installed long weaver rail for scope.

Here's how She performs:
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2,65mm @ 25M , 5 shots

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7,65mm @ 50M, 5 shots

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38,65mm @ 100M, 8 shots.


So far I've been happy with the power (50j) and especially the accuracy, so I haven't done any "power mods" yet..
But I'm seriously considering them too, just worrieng about losing accuracy.

Thanks for a great forum , and all the fearless modders that make it

Here's some new pics on the way.
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Modified the pistol grip to better and comfortable grip, laminated the whole stock with fiberglass and added the waterlevel to scope. Changed the sling for more matching black, Coated the pistol grip and forestock with non-slip fabric for better grip.Added the picatinny rail for adjustable cheek piece. Changed the hammersping, added more weight to the hammer and drilled the tranferport and polished ports.Added DIY 6 chambered silencer. Now I'm off to paint the stock.Maybe tomorrow more pics.
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Added command arms adjustable cheek piece:
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Finished gun:
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It now pushes the 31gr baracuda 268-272m/s (892-905 ft/s) and +70j power.

The gun weights ~7kg and does one holers in 25m. Project finished, I'm satisfied.

Nice congratulations on a nice rifle. I wouldn't mind building one from an 850. How many full power shots do you get out of that cylinder? Vary nice.

I get about 45 shots, but I'm only filling to 250 bar.

Very nice rifle man. Great accuracy too. I know there is an interest in the 25cal
versions out here too.
Thanks for sharing your pics with us and welcome to the 850 Resource.  

The 850 Store

Waiting for a reply from Umarex EU when they return from their 2 week holiday... Got the .25 mags, probe, boxes of Hornady .25 swaged #3 Buckshot, FTS/Kodiaks, 1800 psi reg with 68 cu.in. bottle, refurb .22 850 waiting for barrel, special 1.25" dia RFM .25 16" shroud...

wow! this is one expensive rifle! Have fun with it! by the way it looks great

What scope did you mount on the unit ?

Join & Support the NRA, or only criminals will have guns!

Thanks, the scope is ZOS 10-40X50 IR Mildot.

Thanks for posting your accuracy/shot count results !!! I'm trying to get a .25 Dominator barrel to put on my 850. Keep us posted with your further testing!!!

Looks awesome

Fiberglass adjustable cheekpiece:[IMG][/IMG]

Made the adjustable cheekpiece because I shoot 95% of time from bipod rest in prone position,and the medium height scope mounts make the position not too comfortable for me.
Made the cheekpiece from fiberglass to fit on the original stock and coated it with textile tape for more comfortable feeling for cheek.

OMG !!!

I am VERY interested in this airgun....have been wanting a .25 cal THUMPER bad...

Can I give you a call to chat? or an email?
I got some questions. :D

Thanks!

Dan

--------------------
Daniel Koster
KosterKnives.com
479-366-7794
dan@kosterknives.com
--------------------

I will gladly try to answer you'r questions via email.

Hopefully I'm able to borrow a chrono for weekend,so we can see how much did the power mods lower the power

Great! Looking forward to hear how it worked out.

The 850 Store

Borrowed a chrony and tested speeds at the track today.
1.265
2.271
3.272
4.269
5.269
6.--
7.270
8.271
9.--
10.268
11.271
12.269
13.270
14.268
15.269
16.--

Tested with H&N Baracuda .25 31gr
Conclusion:Power tweaks has worked brilliantly, average energy over 70J I think that the reason for so many errors on sting is caused by bad weather..it's raining heavily and weather is dark.
I started with 250bar and finished after 2 mags at little over 150bar left. So with 250bar fill I get 3 mags before change of poi.
Before I start tweaking more I have to find a good heavier pellet the baracuda..so far I have not found one.
Currently I'm very happy with the gun on power and accuracy.

Great shot string, very low spread.
What mods did you do to it and what did the pre mod velocity look like?
Looking very good!
Roald. 

The 850 Store

I didn't have chrony back when it was stock.. but my guessing is that it was more than the 50j the factory says..

the power mods "Changed the hammersping, added more weight to the hammer and drilled the tranferport to 4,5mm and polished ports." maybe next time i take pictures from inside the gun too to show u guys. and i did drill the tranfer port bit bigger before chrony..

Perfect, thanks Timo. Well it sounds like you got it right man.
It's shooting very well.
Good work.

The 850 Store

The scope I'm going to change with better quality and little less magnification.

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