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PCP - HPA - C02 Gate => Crosman Discovery Forum => : joe-joe guns October 25, 2009, 07:40:47 AM
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As stated I made a power adjuster at work the other day and took Bhawannas advice on boring the end cap another quarter inch deeper to be able to decrease power also.All I can say is how cool it is.I just got a chance to shoot today and with the power all the way down I started at 2000psi fill and took 80 shots I was still at 1500psi when the wife called me into the house.I don't have a chrony but I was shooting at 10meters and had just a slight drop in POI from full power.It's got just a quite little *_*_*_*_*_*t sound.Great mod along side the power adjuster especially for backyard target plinking.Good one Bhawanna.
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Way to go JoJo, I took the same advise and bored out mine as well. Not as much though. I get the exact same poi at 1000lb as I do at 2100lb at 25 yd, and still have about 45 good shots. I'm waiting for a chrony so that I can test out the fps. Any idea how many fps with the 80 shots?
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glad that little "tid-bit" helped you out. i just got back home from the "timmy-the-stockmaker" and we did a little mod to my disco. we bedded the action in the stock with some "very" thin leather. that made a world of difference. my gun never felt like the action was solid in the stock but after timbo's bedding technique, it has a solid feel now and we "treaked" the trigger mod a little too. it has about a 10oz. trigger pull now. should you decide to do the 3 screw trigger mod, i can give you "tid-bits" on it also.
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I tried the 3 screw mod but I experienced a bit of sear drag and my poi was all over the map. (Some guns seem to be sensitive to this for some reason) . So rather I polished the sear and lower link components, lubed them and replaced the factory trigger spring with a pen spring. Now I've got her just where I want her. I went out with it earlier today, without any power adjustment...consistent 1/4" group at 50 yards for 35 shots before a drop in poi, with power to spare! I just installed a new custom stock from Airguns of Arizona, it's got a real nice fit and feel, a bit costly at $350.00 (duties,taxes and shipping included, but is is definitely worth every penny!
Thanx, Shel.
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in stead of doing the "3" screw mod. use only the 2 screws in the rear. screw the top one in until the gun fires then back it off 1/4 to 1/2 turns. then adjust the bottom screw until the trigger starts to move forward. see how you like that? it takes all the first stage out of the trigger and makes it like a powder-burner trigger set-up. be careful on the top screww and don't make it too sensitive or you may have a "miss-fire" accidentally.
skip the third screw all together.
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Thanx, maybe I'll give it a try. I think that it was the 3rd screw that caused all of the trouble, but who knows?
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...Sorry, I meant 1/2" groups at 50 yards!!!