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PostPosted: Sat Jun 22, 2019 4:41 pm 
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wesb2007 wrote:
That's great! I can't remember exactly but I don't think I used an overly thick 3/4" oring for the bstaley mod. The valve stem is very short so doesn't need much that's for sure.

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Thank you
I just finished turning the shoulder of the striker down to 0.495 to make sure it would clear the o-ring (s).
Image

I Put 1 o-ring (¾ Od 9/16 Id by 3/32 It dropped my fps 23 fps over 2 magazines on a fresh cart. Gives me a bit more of a non pal buffer as it was shooting at the ahem "Edge" shooting jsb exact express 14.35's.

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PostPosted: Sat Jun 22, 2019 5:36 pm 
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Looking forward to seeing how it improves shot count!
Regards,
Wes

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 Post subject: Artemis CR600w tweaking
PostPosted: Sat Jun 22, 2019 10:12 pm 
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I may havre a problem.
I can't leave my lathe alone so i made some escutcheons for the stock mounting bolts.
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PostPosted: Sun Jun 23, 2019 11:01 pm 
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I’d say you have a problem walther...your making me jealous that I don’t have a mill and a lathe.


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PostPosted: Sun Jun 23, 2019 11:06 pm 
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Ditto

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PostPosted: Mon Jun 24, 2019 12:48 am 
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Ronan_357 wrote:
I’d say you have a problem walther...your making me jealous that I don’t have a mill and a lathe.


It's a vintage unimat db200 converts into a mill. Best 350 I ever spent on craiglist.

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PostPosted: Mon Jun 24, 2019 1:20 am 
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wesb2007 wrote:
Looking forward to seeing how it improves shot count!
Regards,
Wes

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So far I have 41 shots around (465fps) with 10fps spread and then it dropped down about 30ish fps for 4 shots and I ran out of time. I'd say its working ok:)
I was using 1gr jsb exacts. I'd like to try some heavier ones next.

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 Post subject: Artemis CR600w tweaking
PostPosted: Thu Jul 18, 2019 1:01 pm 
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I'm not a big fan of really long barrels.
The stock CR 600 W barrel is 21.5 inches. In a fit of boredom I cut the barrel down to 19 inches. And then i re crowned it.
Incidentally I had to read an article that talked about CO2 expansion and that the optimal length of a CO2 rifle barrel was around 17 to 19 inches after that you may actually lose FPS.
Before I cut the barrel I put in a brand new CO2 cart get a string of five shots all around 465 after I cut and croened the barrel i put a brand new CO2 cart, FPS was up to 485 for a string of five shots..
hmmm
Image
Image
because I cut the barrel down that required a changeup on my airstrip or mount, It got reamed out to exactly 12 mm tight fit on the barrel.
I then decided to machine the entire unit to one diameter to make it more sleek And change some of the angles to more of a business like look ie no curves.
Image
I also re-machined the other end shroud ring.
Image
Here it is all back together just barely longer than stock.
Image

next up adjustable comb...

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Last edited by walther on Thu Jul 18, 2019 1:10 pm, edited 1 time in total.

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PostPosted: Thu Jul 18, 2019 1:06 pm 
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walther wrote:
I'm not a big fan of really long barrels.
The stock CR 600 W barrel is 21.5 inches. In a fit of boredom I cut the barrel down to 19 inches. And then re crowned it.
incidentally I had to read an article that talked about CO2 expansion and at the optimal length of a CO2 rifle barrel was around 17 to 19 inches after that you may actually lose FPS.
Before I cut the barrel I put in a brand new CO2 cart get a string of five shots all around 465
after I cut the barrel i put a brand new CO2 cart FPS was up to 485 for a string of five shots..
hmmm
Image
Image
because I cut the barrel down that required a changeup on my airstrip or mount, It got reamed out to exactly 12 mm tight fit on the barrel.
I then decided to machine the entire unit to one diameter to make it more sleek And change some of the angles to more of a business like look ie no curves.
Image
I also re-machined the other end shroud ring.
Image
Here it is all back together just barely longer than stock.
Image

next up adjustable comb...
I like what you did to the stock as well. Looks very nice!

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PostPosted: Thu Jul 18, 2019 3:24 pm 
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Was there a choke in the barrel before you cut and recrowned it ?


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PostPosted: Thu Jul 18, 2019 4:03 pm 
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Location: Caronport, Saskatchewan
Very nice! I really like it as well! Amazing work.

These don't have chokes in the barrels as far as I've seen.


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PostPosted: Thu Jul 18, 2019 4:34 pm 
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wesb2007 wrote:
Very nice! I really like it as well! Amazing work.

These don't have chokes in the barrels as far as I've seen.
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Pretty much what I figured too, I ran some copper washed h&n pellets which are a very tight fit and there was no difference anywhere in the barrel. Btw the copper washed h&n were tough to load in the mag and the chamber.
I get about 25fps less with them over jsb's.

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PostPosted: Thu Jul 18, 2019 4:53 pm 
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pelsby wrote:
Was there a choke in the barrel before you cut and recrowned it ?

No choke

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PostPosted: Fri Apr 03, 2020 3:14 pm 
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Location: Near Montreal, Quebec
This thread been super inspiring. Amazing work ! I have a new CR600W and am exciting to make it better. I’m new to air guns and modding but I have some translatable abilities in the workshop , I just don’t want to break my gun haha.

I have a couple of questions maybe you guys can help.

I ordered this barrel band :

https://airgunarcheryfun.ca/artemis-dia ... 00-cr600w/

Will I have to remove the muzzle to put it on ? I’m a bit intimidated with that but can really see the need for the band.

Also I’ve read that a good seal test is to shoot with a drop or two of pellgun oil in the barrel and if smokes then it’s good. Is this only for springers? I did that test with my CR600W and no smoke. Although I’m very happy with the few pellets I’ve shot with it so far.

Thanks so much !

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PostPosted: Fri Apr 03, 2020 4:36 pm 
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Location: Kingston, ON
QuebecPlinker wrote:
Will I have to remove the muzzle to put it on ? I’m a bit intimidated with that but can really see the need for the band.

One way is to remove the front sight and slip the band on from the muzzle.
The other way is to remove the barrel, and the barrel band, then install the new barrel band and the old one, and replace the barrel. I did it the latter way at first. To remove the front sight, the easiest way as I learned from this tread, is to drill a hole just over 12mm diameter in a board or similar stiff plate (I used 3/8 plexiglas) and then drop the barrel repeated through the hole, takes about 5-7 drops and the foresight will come off. Protect the breach end, don't let it hit the floor or anything hard.

QuebecPlinker wrote:
Also I’ve read that a good seal test is to shoot with a drop or two of pellgun oil in the barrel and if smokes then it’s good. Is this only for springers? I did that test with my CR600W and no smoke. Although I’m very happy with the few pellets I’ve shot with it so far.

Thanks so much !

That's just for springers. Check the breach using a pice of tissue, if it blows off when firing you have a leak.

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