GTA
All Springer/NP/PCP Air Gun Discussion General => PCP/CO2/HPA Air Gun Gates "The Darkside" => Big Bore AirGun Gate => Topic started by: melloroadman on October 26, 2012, 10:40:31 PM
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Sent the 357 that I bought from Grumpy to LI Bob and he fitted it with a TJ .452 1 in 16 twist CM barrel for me . All I had to do was fit a barrel band to it . Nothing other than a caliber change was done to the rifle .
(http://i301.photobucket.com/albums/nn55/melloroadman/IMG_7195-45CALCORSAIR.jpg)
(http://i301.photobucket.com/albums/nn55/melloroadman/IMG_7198-Copy.jpg)
These are straight fills which I normally do not do . Had 15 mile a hour wind today so I did not try for all out accuracy . But it had no problems grouping with the bullets I have tested in the past in the Gargoyle .Here are todays readings .
(http://i301.photobucket.com/albums/nn55/melloroadman/CORSAIR%20PLUS/IMG_7193-452Corsair10-26-12.jpg)
And this is were it was at as a .357 . Marvin
(http://i301.photobucket.com/albums/nn55/melloroadman/CORSAIR%20PLUS/IMG_7171-357CORSAIRPLUS8-27-12.jpg)
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i dont know much about big bores
thats some pretty nice fpe though
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Nice rig! Anything on the receiving end of that is going to have a very bad day.
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The rifle is strong enough to hunt for sure . And we need to remember this is a QB based rifle with only a 7/8 air tube like a Discovery .Marvin
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The rifle is strong enough to hunt for sure . And we need to remember this is a QB based rifle with only a 7/8 air tube like a Discovery .Marvin
that is something!
pretty good for a gun that is qb based!! 8)
have you had a chance to do some accuracy testing yet? i saw it was pretty windy when you did the velocity testing
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The rifle was grouping good enough with me not concentrating and the wind blowing that I am not worried . Have several rifles with TJ barrels and every one of them has proven to be accurate with the right sized bullet . Tomorrow I will chrony with a lighter spring to lower the air usage and psi. And stay with the lighter bullets . That was my intention from the beginning . After I get the tune of the rifle were I want it I will concentrate on accuracy . I have proven bullets and the barrel slugged at .452 so I have known perimeters to start with .Marvin
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Did a couple spring swaps today . I really thought the fill would be higher with the first un- cut set spring but it was not . I had a uncut, non set spring I tried as well . But after the first set of readings on it I redid the RB and the 142 grain bullets and they were down 10 fps over the first strings . So the spring was taking a set . I will try some more springs another day . Would like to get the fps a little higher . Air usage by the tank gauge not a refill reading showed that the RB did not use any more air than the conicals . Every bullet other than the RB have been accurate in the Gargoyle . And all as well as the RB would group a 5 shot string at 50 yards with all projectiles touching each others . Marvin
(http://i301.photobucket.com/albums/nn55/melloroadman/CORSAIR%20PLUS/IMG_7202-452CORSAIR10-29-12.jpg)
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very nice!
this makes me want a gun like this but i'll settle for a .32
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I clipped .020 off of a stock spring and ended up with a 2800 psi fill . Gained about 60 fps over the 2300 psi fill . But the air usage went up 100 plus psi per shot . To make sure my usage reading was right before . I changed the spring back and tested again today and the reading was correct . Going to try and get to around 2500 psi fill and stay around 850 fps with the RB . for now . That way I do not have to carry two tanks around at the range . Marvin
(http://i301.photobucket.com/albums/nn55/melloroadman/CORSAIR%20PLUS/IMG_7218-45CORSAIR11-2-12.jpg)
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Shortened a stock spring to 2.750 and end up with a 2500 psi sweet spot when regulated . FPS should do for 50 yards for now . The RB are using about 10 psi less per shot than the 142 grain conicals . So I will start with them and see if I can get 125-150 shoots per tank . Marvin
(http://i301.photobucket.com/albums/nn55/melloroadman/CORSAIR%20PLUS/IMG_7228-452Corsair11-5-12.jpg)
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impressive!
i cant wait until i get a big bore set up.hope to get the fpe you are
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impressive!
i cant wait until i get a big bore set up.hope to get the fpe you are
Thanks . GL . Marvin
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Shot 150 RB through it today . And it would make one big hole with 10 shot groups . At 50 yards bi-pod on table , tethered and regulated at 2500 psi . Started with a 80 cf tank at 3490 psi and ended with 2690 psi . Tank is black and was in the sun so some heating may have taken place in the tank . But even if it did I should be able to get the 150 shots out of a tank . Marvin
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Have a lot of alloyed lead . And I know the rifle will handle conicals to 22 bhn . So I cast these RB in 15 bhn to see what will happen . Will have to let them age . Then I will chrony them and test for accuracy . They have not been sorted , weighed or lubed .Marvin
(http://i301.photobucket.com/albums/nn55/melloroadman/IMG_7240-Copy.jpg)