DISCOVERY WITH 2250 SPRING AND MOUNTAIN AIR SPRING GUIDE

[melloroadman]

Beeman  silver sting .177 , 8 grain pellets , 1700 fill , 1 fill , one 25 shot string , one 15 shot string , 4 turns on power adjuster .
String 1 - 852 , 846 , 851 , 850 , 857 , 860 , 859 , 864 , 876 , 871 , 876 , 878 , 878 , 880 , 872 , 881 , 876 , 886 , 884 , 885 , 883 , 888 , 884 , 885 , 882 , average 872 fps .
String 2 - 877 , 885 , 883 , 883 , 879 , 883 , 872 , 869 , 867 , 867 , 870 , 861 , 859 , 856 , 852 , average 871 fps .
Average of 40 shots 872 fps with a 4 percent deviation . Marvin

[Big_Bill]

Hello Marvin,

Great post ! I don't read that many post on the Discovery Forum :) I'm afraid of being addicted ti the DARK SIDE.

But I take it that you have had some work done at Mountain Air, or parts, that have made these great strings !

Now you see why I don't read very many PCP posts. hehehe

Great information, and thanks for sharing it with us,,,I think ?

Bill ................now the dark side is calling me ,,,again :(

[crazy4salmon]

The force is strong in you Bill. Follow your heart. You know your feelings.

Great info. Those are great looking strings.

[melloroadman]

I have about $ 10.00 - $ 12 .00 invested in this project .Marvin
http://www.gatewaytoairguns.com/airguns/forums/thread-view.asp?tid=13789&mid=110800#M110800

[onelight]

Marvin 40 shots that consistent is outstanding!

 What velocity range can you get with your power adjuster?

[melloroadman]

With this spring guide this is it . The guide starts to rest on the striker when you pull the bolt back if I go more than 4 turns . I do not know if this is the guide Roy uses with his power adjusters or not . I could always shorten the guide some if I wanted to but I think for now I will leave it as is . With my home made short guide I could get twice the turns out of it but the springs would chant in a short period of time and power would drop off and the fps gain was not much higher . This seems to be a good balance of air usage to power . At least for what I am using the rifle for at this time . Marvin

[onelight]

Thanks Marvin.
 I was curious if you could turn the power down to 5 or 600 fps.
Mark

[melloroadman]

Not with this spring if you look at the 100 shot string back a page you will see what it did with 10.5 pellets . If you had a little lighter spring or clipped a coil or two off this one you could get there if you wanted to .Marvin

[5thumbs]

Can you snip a few coils from the stock Disco spring to get the same effect as the 2250 spring?   I want to power up more than down and had some delrin spring guides made but they fit Disco spring (wider) as opposed to the lighter 2250 spring.

Thanks

[melloroadman]

My Discovery and 2250 springs are the same inside and out side diameters . The difference is in the wire size and the guide I have will work with both springs . I have not heard of there being a difference in them as you stated before . I have never tried to clip the Discovery spring so I can not answered that question . But if you do a search here Kirbby may have done that when he first got his Discovery and there might be some info on it or give him a P.M. Marvin

[5thumbs]

Thanks.   I ordered one (2250 spring) from Crosman and it looked exactly like the one that came with the Discovery.   If it is the same length and ID then perhaps I need to take a closer  look at it.

[melloroadman]

Its not that much lighter when you try and compress it with your fingers either . My 2250 spring is a little brighter in color .Marvin