Tuning Stainless steel barrel sleeve

[qball]

Chuck can stack em without one, he can definitely shoot. But again it isn't about accuracy, full disclosure I have 3 on my favorite (700mm) liners and love them. As well as a 14x20mm 3mm wall one I run on the outside. I like them, I can bounce it around in the woods and POI doesn't move. To each their own but I am admittedly one of those suckers and enjoy it.

Ok fine, I am not as good of a shooter as chuck and having the carbon liner certainly helped my accuracy. Let me clarify further, if someone find the harmonic sweet spot for the barrel then it certainly will be as accurate as a liner with a carbon sleeve. With the carbon sleeve the harmonic tuning is night and day easier for me. Same exact .25 700mm heavy liner before the carbon sleeve I can only get the slugs to be sub MOA at 100 meter at lower speed close to 800 FPS. Above 900 fps my best group was under 2 inches and everything else was bigger. With carbon liner every setting on my impact is no larger than 2 inch at 100 meters and multiple sub MOA groups in the 900FPS range, almost no tuning is required if I just want to hunt. However the effect isn't as dramatic on my 500mm liners because of less harmonic issue but still noticeable better 100 meter groups regardless of the tune. 



So to chuck it is 100% unnecessary but to me it is 100% necessary! I just messaged Ernest and begging him to take my money! LOL!

 

[Guest]

I can understand putting a carbon fiber or stainless steel sleeve on a barrel because you just like the way it looks, but I am not convinced that it improves accuracy enough to warrant installing one. So I guess I am going to have to try one for myself - with that in mind I sent an email to the guy in Belgium that's making the stainless steel barrel sleeves and am waiting for his reply...who knows I may end up getting much better accuracy than I am now? I just hope I don't end up eating crow over this... 

Here is the guy I emailed to buy a stainless sleeve: [email protected] - I am waiting for a reply. Meanwhile if someone wants to send me a carbon fiber sleeve to experiment with I will try it out for myself.

 

[Glem.Chally]

Again, improved accuracy was never the claim.

 

[Guest]

Maybe you didn't claim better accuracy Nathan but others did...eg the post just above from Qball "noticeable better 100 meter groups regardless of the tune." And he is just one of many others that have claimed better accuracy with carbon fiber sleeve...so if someone would like to send me one I will test this for myself. So anyway Nathan, if there is no improvement in accuracy for you then what was the point of you doing it?

 

[Glem.Chally]

Maybe you didn't claim better accuracy Nathan but others did...eg the post just above from Qball "noticeable better 100 meter groups regardless of the tune." And he is just one of many others that have claimed better accuracy with carbon fiber sleeve...so if someone would like to send me one I will test this for myself. So anyway Nathan, if there is no improvement in accuracy for you then what was the point of you doing it?

I wrote it out on the previous page Chuck, have a look.

My point is it wasn't advertised as more accurate by ernest as far as I know. Of course people will have their opinion on the results. Talking about it like a money grab infers it was being sold as an accuracy improver isn't the case. More marketed towards adding stiffness for bumping around in the woods without a POI shift perhaps, no more orings in the barrel etc

 

[qball]

Maybe you didn't claim better accuracy Nathan but others did...eg the post just above from Qball "noticeable better 100 meter groups regardless of the tune." And he is just one of many others that have claimed better accuracy with carbon fiber sleeve...so if someone would like to send me one I will test this for myself. So anyway Nathan, if there is no improvement in accuracy for you then what was the point of you doing it?

the stainless barrel housing and the carbon liner sleeves are 2 different topics. Personally I also don’t see why the stainless barrel housing would even prevent POI shift, sure the barrel is ever so slightly stiffer but the how the barrel attaches or supported by the action hasn’t changed. With the carbon barrel tensioner or barrel tension spacer over the steel or stainless barrel will provide extra support/contact point with tension/down force and that indeed has proven to prevent POI.



the carbon liner sleeve is to add stiffness to the liner inside of the barrel housing to help reduce guitar string like harmonics at high power because it is very skinny compared to traditional barrels. Less pronounced in shorter barrel liners but definitely shows up for me on 700mm barrels.



hope that helps with clarifying why posts.

 

[Guest]

Okay so I need to put my Barrel liner inside a carbon fiber sleeve and then put that inside my new stainless Barrel sleeve but I'm trying to order. Okay I will definitely give it a try and we'll see what kind of results I get. Who knows I may surprise myself?

 

[qball]

Okay so I need to put my Barrel liner inside a carbon fiber sleeve and then put that inside my new stainless Barrel sleeve but I'm trying to order. Okay I will definitely give it a try and we'll see what kind of results I get. Who knows I may surprise myself?

yes, but if you going to go that far might as well get the spacer to put tension on the barrel and get additional support and contact against the action. It really does help with POI shift for me from bumping the barrel accidentally. 


if you are trying the carbon liner sleeve on a 700mm liner I’m pretty sure you will easily see improvement/groups shrink at 100 yards through out the HS setting without pain staking fine tuning and with some fine tuning it’s just nutty accurate…..for me! 


good luck and have fun with the experiment, only down side is I don’t spend much time tuning/shooting my impact now and says. 


Ernest doesn’t sell his liner sleeves on 910airguntuning site anymore, probably because FX most likely bought the rights. You still can find some liner sleeves on eBay but it’s sporadic in availability, still better than no availability from FX. 

 

[Guest]

I think I'll have fun with this because I love to experiment with my air rifles and try to figure out new ways to get better performance. I think my problem is I ran out of experiments so this should be fun. I got an email back from the guy in Belgium this morning so I gave him my information and I'm waiting for the PayPal request to come in. I told him don't ask me for the funds unless he has one ready to ship... I'll let you know how things unfold later. Thanks for your input my friend.

All the best, Chuck

 

[qball]

Forgot to mention, ask if the inner diameter of the stainless barrel housing is the same as FX factory barrel housing because if it’s thicker/inner diameter is smaller the carbon liner won’t fit. IMHO the stainless barrel housing isn’t worth the trouble. Carbon liner sleeve in factory housing with a spacer for the shroud to tension the whole thing is the best combo I’ve found. I have the full length shroud replacement too but don’t use it because it makes the gun really loud so I need much bigger moderator which increases the over all length. 

 

[Guest]

Well thanks but I like the looks of it anyway. Because of all the scratches and marks on my original black Barrel tube I sanded it all off down to bare metal and I like the look.

 

[qball]

Well thanks but I like the looks of it anyway. Because of all the scratches and marks on my original black Barrel tube I sanded it all off down to bare metal and I like the look.

Ah, I see. Just check the inner diameter though. I have one of the original STX FX barrel housing that has slightly smaller inner diameter and the carbon sleeve won’t fit. 

 

[Jasonmc]

I made one for my dreamline compact (I bought it in 177 and wanted 22,25 barrel kits which seem to be impossible to find at this present time) so I made my own. 22 (320mm barrel kit) and 25 (450mm barrel kit) I used SS for the tensioner 12mm x 14mm. Works great for me.