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 Post subject: Snow Peak CP2/Varmint
PostPosted: Mon Nov 06, 2017 3:05 pm 
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Location: Caronport, Saskatchewan
Well, my project is coming together! Ordered some parts from Snow Peak in China, and Mrodair in the States, and built myself a CP2/Varmint in .177.
Can't get barrels or stocks from Snow peak but a fellow on the GTA forum had a spare off a .25 conversion. The stock I got from Mrodair.
Here is a few pictures. I was waiting for the barrel and took a few without it but it came today [emoji846]. The gun weighs 3lbs 10 oz. Still have to weigh it with a scope. Really light anyway!
It has a 3000psi fill capacity and I suspect I'll have to tame it down a bit by cutting the hammer spring a little.
Pellets should be arriving tomorrow, as I don't have any other 177 guns!
I still need to make the stock permanently in rifle mode with epoxy, should have done that already before sticking barrel in for the picture, so that is next order of business.
ImageImageImage

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PostPosted: Mon Nov 06, 2017 3:48 pm 
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Location: Winnipeg, Canada
Interesting! How long is the tube? Looks like at least 2 head-in-shear screw retainer system for the fill block- probably 3?

Is there play in the stock with that thumb screw bolt? :mrgreen:

-D.S.

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PostPosted: Mon Nov 06, 2017 5:57 pm 
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Location: Hill Spring, Alberta
Wow!

That is one beautiful/graceful looking air rifle.

Peter :D


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PostPosted: Mon Nov 06, 2017 6:36 pm 
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Thanks Peter, I like it too!

Hi Doc, it's 20" long total. I think only 80 or 90cc. The end cap is like a disco I think? Fine threads, different in that it has a fill port with fill adapter that slides in the hole in the end cap to fill. The gauge block is maybe 1 to 1 1/2" in front of the valve to give some plenum space. The valve is retained by two screws in the bottom, plus a kink in the tube top and bottom and then a large metal transfer port that sits down into the valve tight and up to the barrel /breech. It is a repeater, 9 shots in 177 and 7 shots in 22. It also comes with a single shot tray.
The bottom stock add on is very tight and fits well with no play! [emoji846]

I've bought parts for the CP2 as well and plan on selling it if anyone is interested. That one will be a convertible, from pistol to carbine, in 22 caliber, and will shoot under 500fps, on co2 cartridge, it will only have the 10" barrel, but crosman barrels are easily converted, so if a guy wants, it can be done.
Here is the magazine. Its the same as the cp1 pistols. Put the first pellet in from the back and the rest from the front.
Here it is with the scope on and barrel, lol. ImageImage

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PostPosted: Mon Nov 06, 2017 7:17 pm 
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Here is my three project guns together. I swapped the barrel off the Varmint to stick on the 2nd one and just placed the 88 gr there just to show how I'd attach it with a gauge block inside the tube. Idea is a lower pressure gun, like my Qb78, in 22 caliber.

My idea was to buy parts for 3 guns and sell 2 to help pay for the third. Ha! These ended up costing so much by the time I get my barrels for the other two ill be lucky to get the cost of those 2 back. Fun anyway!

What do you guys think? Should I stick a one way quick connect male fitting in a gauge block, then have a quick connect on the asa so a guy can connect it like I have set up if wanted, and if not, just disconnect the bottle at the quick disconnect and fill with co2 for lots of shots that way too? You could also fill the whole thing with co2 as well and have hundreds of shots with it all connected. (or 25 powerful shots on HPA).
Kind of a nice switcheroo gun that way. [emoji846]
I've ordered a 35mm set of rings (actually only half a pair) to connect to the bottom of the barrel band. The ring also has a rail on it so a guy could connect a bipod under the tank. Here is a picture of the 35mm ring that will fit around the 88g tank.



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Last edited by wesb2007 on Mon Nov 06, 2017 7:40 pm, edited 1 time in total.
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PostPosted: Mon Nov 06, 2017 7:28 pm 
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Looking at it now, I'm thinking maybe a dumb idea. Looks a little weird, lol. Maybe I'll have to keep that gun for myself, lol.

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PostPosted: Tue Nov 07, 2017 7:16 pm 
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Hey Wesb2007,
That is a really 'sexy' looking airgun you put together. Like the scope with the silver and black frame contrast. Very appealing.
Don't see why you couldn't sell...these are 'one of a kind' ..made by an 'artisan' no less.
Best of luck and congrats on your project becoming a reality.

Hawk-i :mrgreen:

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PostPosted: Tue Nov 07, 2017 8:35 pm 
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Thanks Hawk-i [emoji846]!

Well, I got some pellets today and did a string with 10.? gr Gamo, ended up sort of foolishly wasting 65 shots as I filled it to 220bar which is the end of the green on the gauge and it started out really slow for the first 28 shots shooting between 620-690fps then the next 12 from 713 - 767. Then the final 23 shots were 792 - 940 and back down to 825 where I stopped at 120 bar. The peak velocity was at around 150 bar. This is not typical performance of a varmint. Others recorded shots in the 900 plus range from 200 bar down with 10gr pellets, so I should have stopped and did some adjustments before blasting through that string!
I stuck a stiffer spring in and pumped back up to 200bar and the first shot was really loud and 954fps, so a little too much spring! More tuning to come

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PostPosted: Thu Nov 09, 2017 4:55 pm 
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Just shot a super long efficient string using a thinner oring!

Started out at 200 bar and it was descending, so pumped back up to 210 bar, which was a mistake, as it was still shooting fast enough that I should have filled to the 220 bar max, which would have given at least another 10 shots!

Here it is: Start pressure 210bar

854,886,874,877,886,886,877,895,877,880,904,880,886, 883, 889, 877, 887, 892, 871, 868, 877, 874, 886, 863.874, 866, 866, 857, 749 (10.5 gr), 863,877,843,833 End pressure 160 bar. 33 shots inside 4% of average velocity, and I hadn't filled to the end of the green on the gauge [emoji846]

Wow! Just calculated efficiency and its 1.59fpe/ci using 100cc volume. Pretty good!

You can see with the one shot I did with the 10.5 gr gamo, that the long skirt hanging over the transfer port must be slowing them down a lot, as it only got 13.1 fpe, compared to over 14fpe I was getting with the 8.6 grain h&n. If those heavier pellets are more accurate, I'll have to do a bolt nose mod to push them further in.
I'm happy!

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PostPosted: Fri Nov 17, 2017 9:38 pm 
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Well I'm not sure what happened but today I took my cp2/Varmint out to do some 30 yard shooting and it wasn't doing that well. Decided to shoot a string over the chrony to see if anything was going on and found out my gun was shooting well over 1000fps with the 7.4gr! I had put a heavier spring in as mentioned a week or so ago because the stock spring was shooting so slow but now I switched back to it and it's still shooting in that 910 - 970fps range with the 7.4gr and the bstaley oring. Not sure what happened but I guess that's probably why I was having trouble getting a nice group earlier! It is now shooting with the stock spring where it's rated to shoot so whatever happened it is now much nicer to cock and easier to set the trigger.
Any ideas what could have happened?!

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PostPosted: Sat Dec 02, 2017 11:37 am 
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Just shot a string with the stock spring and the crosman hollow points. 36 shots from 901 to 950fps. Running a little hot, but with 10gr JSB probably a nice power level. 33 (edit:oops, 31!)shots within 4% es is pretty good for such a small pressure tube!
(195 bar) 892 886 895 889 886 907 904 923 930 933 920920 937 937 950 940 947 950 957 930 954 954 950 930 (didn't read) 927 933 943 943 954 957 943 954 937 933 927 923 923 914 917 901 895 135 bar

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PostPosted: Sat Dec 02, 2017 12:22 pm 
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1.69fpe/ci, pretty good efficiency with those light pellets and high velocity!

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PostPosted: Sat Dec 02, 2017 2:39 pm 
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Interesting string. Yes, the jsb heavy would be a good idea to try. You may find you'll have to still dial down on the hammer/spring~
at least in my bbl.'s, they seem to prefer the mid to upper 8's. Don't group that well over 9. I've had reasonable long range success with the cheaper Premier ultra-mag at 10.5 gr....

-D.S.

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PostPosted: Sat Dec 02, 2017 3:56 pm 
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Thanks! Yeah I think you are probably right. I'd like to pick up some of those crosman 10 gr pellets, should have got some when I ordered the jsb.
I'm reluctant to cut the spring on the gun because there is almost no room for a shim when the gun is cocked unless its small enough to fit inside the hammer. I should be able to find something that will work though.

It seems to still jump around a bit in velocity, not too bad though, hopefully putting some more pellets through it will smooth things out.

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PostPosted: Sun Jan 07, 2018 1:05 am 
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Well just sold my CP2/Varmint today, sort of sad to see it go! I think I may have to just build another if I get a chance sometime. It was having some trouble with velocity all over in cold weather and I figured out it was the bstaley oring. Took it out and tried to tune a nice string without it but wasn't happy with how many shots it could get in a nice es. Was getting frustrated as I had someone that wanted to buy it. Anyway I was looking at ordering some silicone orings as they are supposed to be good in cold but then noticed the new green orings I just bought were rated for - 45 degrees so decided try them.
Wow! Got a super nice string! In my books anyway, for a 100 cc tube. I glued the orings to the back of the valve to make sure they don't fall down so hopefully they will work well for a long time.

Here is the string. Having trouble with my chronograph not reading sometimes, not sure what is the trouble but got most shots to work anyway.
7.4gr 200bar fill:

895 886 886 895 904 907 - 917 920 914 - - 927 - 927 930 927 930 927 - - - 933 940 - 933 917 923 930 923 920 923 - - - 923 923 914 914 917 911 917 - 901 892 - 892 898 901 886 - - 889 886 871 868

54 shots within 6% es, pretty nice! 39 within 4% although there was a bit of up and down here and there, almost like a regulator does sometimes =)

Goodbye Varmint! Hope you are enjoyed and find a good home!

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