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| Tinkering with my P22 https://www.airgunforum.ca/forums/topic78084.html |
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| Author: | HuskyDude [ Sun Dec 17, 2017 2:46 am ] | |||
| Post subject: | Tinkering with my P22 | |||
My Crosman .22 barrel arrived from CSS today. I've been waiting to attempt a barrel upgrade on one of my P17's. So I shoved my other projects further onto the work table and started tinkering. Cut the barrel down to the length I wanted (25cm)and started to copy the OEM barrel. This is as far as I got tonite...
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| Author: | airmec [ Sun Dec 17, 2017 7:55 am ] |
| Post subject: | Re: Tinkering with my P22 |
Interesting project  . I'll be following this thread!Did you made a cut-out (yet) in the lower frame to clear the barrel when you open the pistol? |
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| Author: | Ace [ Sun Dec 17, 2017 11:36 am ] |
| Post subject: | Re: Tinkering with my P22 |
your putting a .22 barrel on a P-17 you do realize your FPS will drop significantly the P-17 with a very light .177 pellet shoots at best 420fps...stock |
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| Author: | YepYep [ Sun Dec 17, 2017 12:25 pm ] |
| Post subject: | Re: Tinkering with my P22 |
Interesting! Actually I want to replace a longer barrel for the P17 for a long time (uhh... not that long as I owned my P17 for a very short time though) as I think the design of the stock P17 looks has no limit on the barrel length. maybe the 24 inch 1377 barrel won't be that fit but I think maybe a 10 inch barrel will fit better. And I like the look of the extended barrel out of the frame ~ Sent from my LG mobile |
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| Author: | HuskyDude [ Sun Dec 17, 2017 8:20 pm ] | |||
| Post subject: | Re: Tinkering with my P22 | |||
Did a little more this afternoon. Dry fit the barrel a bunch of times. Drilled a #21 for a 10-32 NF tap in the front cocking lever/barrel cover. This will help hold the barrel against the Breech O Ring. I'm on the hunt for a Hex set screw tomorrow. Looks like it was cased for a set screw but never taped at the factory. Did a pre assembly and found it to be some what nose heavy so I epoxied some lead shot to the inside bottom of the grip. It balances nicely on the trigger now. Did some other mods will list later. Edit: Yes the barrel clears the bottom frame.
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| Author: | leadslinger [ Sun Dec 17, 2017 8:51 pm ] |
| Post subject: | Re: Tinkering with my P22 |
I gotta make one one now. Time to fabricate a make shift lathe. Cut down a 10.1" barrel. |
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| Author: | HuskyDude [ Sun Dec 17, 2017 11:07 pm ] | ||
| Post subject: | Re: Tinkering with my P22 | ||
She's finished I was waiting to pick up a hex set screw tomorrow to hold the barrel in place. But realized during supper I had a whole bunch!!! Borrowed one from a wheel collar off one of my RC model planes. Set the barrel to properly seal against the Oring. Tighten up the set screw and ran a couple of pellets through her. My sound meter does not record max decibels (too old) or I'd post results. It has about the same snap with the .22 pellet leaving the barrel as the .177...maybe a bit quieter. But the sound of it hitting the target is a lot louder !!! Man I love this thing !!! It hits hard !!! I'll sight it in tomorrow. Okay so the other Mods I did. -JB welded the intake air hole closed on the piston cylinder. -Removed the Auto safety (pull trigger when opening piston to obtain air though breech) -Ported the air hole in the back/bottom of the air cylinder larger. -Ported the Breech hole larger. -Port and polished internals. Pretty sure this is gonna be my Fav for awhile !!!! 
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| Author: | wesb2007 [ Sun Dec 17, 2017 11:55 pm ] |
| Post subject: | Re: Tinkering with my P22 |
Great project! Looking forward to your chrony results. Sounds like you got some great performance with your mods! Sent from my SM-G930W8 using Tapatalk |
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| Author: | wllm995 [ Mon Dec 18, 2017 12:03 am ] |
| Post subject: | Re: Tinkering with my P22 |
wesb2007 wrote: Great project! Looking forward to your chrony results. Sounds like you got some great performance with your mods! Sent from my SM-G930W8 using Tapatalk X2!
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| Author: | YepYep [ Mon Dec 18, 2017 7:40 am ] |
| Post subject: | Re: Tinkering with my P22 |
X3! (。・`ω´・) Sent from my LG mobile |
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| Author: | HuskyDude [ Fri Dec 22, 2017 1:56 am ] |
| Post subject: | Re: Tinkering with my P22 |
wesb2007 wrote: Great project! Looking forward to your chrony results. Sounds like you got some great performance with your mods! Found some time to put some more lead down range. I'm very pleased with everything so far. But I only have Crosman .22 domed and Crosman hollow point 14.3gr to shoot. My next order I want to get a variety of different pellets to try. For those that need a FPS rating on the .22 barrel... not excepting my Caldwell Chrony to arrive till the new year and will post results then. Quote: your putting a .22 barrel on a P-17 you do realize your FPS will drop significantly Not sure how to take that Ace???  Yes I am fully aware of a drop in FPS...It's not always about speed...Right? |
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| Author: | Ace [ Fri Dec 22, 2017 11:58 am ] |
| Post subject: | Re: Tinkering with my P22 |
HuskyDude wrote: wesb2007 wrote: Great project! Looking forward to your chrony results. Sounds like you got some great performance with your mods! Found some time to put some more lead down range. I'm very pleased with everything so far. But I only have Crosman .22 domed and Crosman hollow point 14.3gr to shoot. My next order I want to get a variety of different pellets to try. For those that need a FPS rating on the .22 barrel... not excepting my Caldwell Chrony to arrive till the new year and will post results then. Quote: your putting a .22 barrel on a P-17 you do realize your FPS will drop significantly Not sure how to take that Ace??? Yes I am fully aware of a drop in FPS...It's not always about speed...Right? i was pretty sure you were aware of it just thought id put it out there just in case...and your correct its not always about FPS... 
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| Author: | HuskyDude [ Fri Dec 22, 2017 4:02 pm ] |
| Post subject: | Re: Tinkering with my P22 |
It's "All Good" my friend...just wasn't sure myself.  I was thinking while shooting the other day how FPS and FPE are correlated. If I was to do the P17-P22 mod again and I had my Chrony...I think I would only do one mod at a time. And then record the results. If I had a drop in .22 barrel and tested. I believe although the fps would drop the FPE would remain the same now using a 14.3g pellet. Then adding another 7cm of barrel would make a difference to FPS and FPE. Need a Chrony to prove. All other Mod could have been proven too...one at a time. But for now it is just a joy to shot and my arms are getting stronger every day !!!! 
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| Author: | leadslinger [ Thu Jan 04, 2018 12:40 pm ] |
| Post subject: | Re: Tinkering with my P22 |
Following since I'm working on a 177 extended barrel P17. |
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| Author: | YepYep [ Thu Jan 04, 2018 3:00 pm ] |
| Post subject: | Re: Tinkering with my P22 |
That's a P22 and the long barrel P17 can be renamed to P17-L , or the famous P17-Magnum?? lol ~ Sent from my LG mobile |
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