14mm ID x 20mm OD. A 500mm piece will do unless you have an 800mm barrel like the .357
Twill weave looks best and comes in matte or glossy finish.
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Impact .357 fouling issue
- Thread starter drumie
- Start date
14mm ID x 20mm OD. A 500mm piece will do unless you have an 800mm barrel like the .357
Twill weave looks best and comes in matte or glossy finish.
Well I figured out the issue with this barrel. It needs support. Before I installed the carbon fiber sleeve I was getting 3-4 inch groups at 50 yards. After installing the sleeve this is 10 shots at 50 yards. 
after those shots I took 3 shots at 100 yards, 1st two where right on top of each other and the 3rd was about 1/2 inch away. Now this gun is shooting!!! All I need to do is find a aluminum nut to fit the end to hold on the cf sleeve. Ir better yet have Donny FL make a adapter so I can still use my Robin. Oh and now I gotta order a bunch more pellets.
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Glad to see that you got it worked out. Nice looking group! It would be nice to see DonnyFL make an adapter for tensioning that sleeve so it can remain tensioned when the Ronin is removed. An adapter that can be used on the oem FX moderator so the barrel remains tensioned but with the oem moderator removed is another product that would sell too.
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Cumuluss,
This was the 357 barrel kit that I installed on my Impact. I had issues with fouling, but polishing the barrel fixed that. But the groups weren't very good until I put on the CF sleeve. Now it is shooting great.
Yeah I will get in touch with Donny FL and see what they can do or if they have something in the works.
This was the 357 barrel kit that I installed on my Impact. I had issues with fouling, but polishing the barrel fixed that. But the groups weren't very good until I put on the CF sleeve. Now it is shooting great.
Yeah I will get in touch with Donny FL and see what they can do or if they have something in the works.
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The Impact Mark II that I bought from Utah Airguns shot lights out right out of the box. But they do say if you are going to change calibers that you will also have to changes the internals...so the .357 cal Mark II is different from the other Mark IIs.
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I recommend you give the bore a coat of Molykote M77 every now and then to prevent any fouling. This stuff is 60% molybdenum disulfide by weight in a silicone grease carrier.
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I'm glad for you, you finally taught her how to shoot. It turns out that my conclusions that the barrel design with a 14mm liner is too thin and unstable for a .357 caliber is correct. Get a carbon tube and try it too. We ask you to take a photo of the end of the barrel as you secured it.
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Tango,
I just used a CF sleeve over the entire barrel assembly. If you go back 1 page you can see the pic that I took of it. I just used a nylon bushing and threaded it onto the end. It isn't perfect but now that I know it works I will have to make up a aluminum one for it.
I just used a CF sleeve over the entire barrel assembly. If you go back 1 page you can see the pic that I took of it. I just used a nylon bushing and threaded it onto the end. It isn't perfect but now that I know it works I will have to make up a aluminum one for it.
Upvote 0