GTA
PCP - HPA - C02 Gate => QB-7X Gate -W/Co2 & HPA => : SDale January 15, 2008, 06:59:36 AM
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I got the Rifle a coupla weeks ago and shortly after getting it I mounted a set of B-Square 11mm riser bases, Leapers 3-9x32 AO scope with accushot medium rings. I liked the gun that way. The way it shouldered, grip feel, palm to trigger distance, cheek weld for the scope..EVERYTHING was perfect. Except power.
Well, I exhausted the Airsource bottle after 60 or so shots (Still PLENTY of CO2 left BTW) and got to modding.
I started with the trigger & safety. I smoothed out the sear face and added a bit of moly to it and all the pivot points, then moved on to the sear spring. I replaced it with one that I found at Lowes. The srping for the safety also got changed to a shortened flint spring from a Bic cigarette lighter. The trigger pull is juuuuuuuust under a pound now. No grit, an eeeeeeever so slight amount of creep and a clean break. The safety is also easier to operate. It was kind of stiff and loud with the factory spring, now just a light press does it with a tiny audible "Click".
Onto internals. Polished the hammer and chamfered all the corners, applied a bit of Moly and a small 4mm delrin shim I turned out on the lathe. I also pulled the valve & did the requisite mods as per the instructions on the crosman forum. Opened up the Exhaust port, reangled it & polished. I didn't drill out the cap though. Just replaced the spring with a lighter one.
And YESTERDAY, my 24 inch barrels arrived!!! :D I chucked one up in the 4 Jaw, indicated the bore & went to work recrowning. After that was all said & done, I tore the entire gun apart again to install the new barrel.
Chrony results: Average MV of around 690 FPS with Crosman Premiers and 730 with Beeman Silver Bears.
Did a 10 shot group at 40 yards a little while ago after resighting the scope. A PERFECT 3/8" Clover Leaf.
I'm happy as a pig in a mud puddle! :D Now I just have to spin out a shroud & I'll be COMPLETELY done!!!
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PICS PLEASE!!! :p
Greg
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Sam, it sounds like you got her shootin real nice.:) I love the one I got from Gene also, he got it from MA, soit was already souped up.8) I'm going to start a wood stock for it soon,I'll make you one, when I get it all worked out, if you want.
Mike
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sounds like you made yourself a nice little carbine. kirby
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It sounds like you made yourself a fine shooter Sam,
I'd love to see some photos of this baby !!!!! PLASE !!!!
Bill
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Well, so far it doesn't look any different than any other Plane Jane 2250 except for the 88g bottle hangin off the back. But here she is anyway!
No shroud yet though. I have to get materials this weekend maybe.
I shot the pic of the crown with a red paper background 'cause that's the only way the camera would focus.
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Dang nice crown , and group too!! kirby
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Them groups look real familiar:o mine are about the same, on a good day:) . Looks like you got a real nice shooter, that should be alot nicer in a couple months.8)
Mike
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Nice work on the crown Sam, keep us posted on it's performence. Ed
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Great Job Sam,
You have my mouth watering, can't wait to see the finished baby !!
Sure shoots straight and at 40 yards !!!
Great Job ...
Bill
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Thanks for the compliments guys!
Yup, it should look REAL good in a couple months Mike! hehe :D
Bill... She shoots straight enough I think! Well, more parabolic tee hee. Had to aim 1 mil-dot high at 40 yards.
Hopefully this weekend I'll get the materials and 11mm drill bit to fab up the shroud. I'm still deciding on a 3/4 or 1 inch diameter shroud though.
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Wow...that sure is nice 8)
Looks alot like mine actually, but mine can't group like yours. :D
Any chance I can send my barrel off to you for a crown job?
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Sure, not a problem!
Does it still have the factory crown or has it been crowned before?
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SDale - 1/18/2008 10:28 AM
Sure, not a problem!
Does it still have the factory crown or has it been crowned before?
Still factory untouched.
Great...I'll send you a PM when I'm ready to do this.
Probably around spring time.
If I had a lathe I'd do it myself, I did take up machine shop in high school. I haven't forgotten what I've learned there.
But alas I'm an auto and diesel tech. now.
I couldn't stand the the thought of standing at a machine for over 8hrs. a day.
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OK, not a problem at all!!!
Aaaah, I know whatcha mean about standing in front of a machine all day. I did that for a couple years. Get's kinda repetitive & boring. One day just kinda runs into the next unless you're prototyping something or making something for yourself.