Yes but I agree to the point that the choke fixes all inconsistency issues of rest of the barrel. I understand that FX liner cannot be unchoked and still accurate. Am I right?
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FX Lock this thread please- Discussed with Fredrik, there is no evidence of POI shift in FX barrel liner system
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Being as I have a .30 liner in 700 mm and plan to cut it down to 600 mm?
I guess I'll find out someday.
I guess I'll find out someday.
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Most people who did that just cut from the breach end, just don't forget to mark it after cutting like from the factory.
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Did he mention why FX sells products, that make him quite a bit for poi issues, if POI is a non issue?
Either they know POI is an issue with liners and this is why FX manufactures and sells these products and he lied to you....
Or,...They don't really think poi is a problem and the owner is willing to take advantage of customers for a "non-issue". Either way this isn't a good look.
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Logically agreeable views. But at the same time as I have great respect for Fredrik and FX, I would request you to use respectable words.
We cannot deny the unprecedented contribution of Fredrik to this hobby.
FX has shown the best after sale support even in my country where there is no official distributor.
I can't think of any other manufacturer doing this.
Bhaur
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There was no disrespect in my words. There was only some truth that it's either one or the other. 1. they know there isn't a POI issue and sell those poi products to just make money. 2. They know there is an issue and he told you differently for some unknown reason. Bringing a lot to the AG community doesn't give a person immunity from legitimate questions. eh?
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I only have 2 FX Rifles.
A Dreamline Lite that I put a 700 mm barrel on with no shroud, no barrel band.
And a Streamline. Streamline had a barrel band as the Guy said he needed it but I took it off and gave it back to him.
I don't have any problem with POI with the Dreamline but I only shoot bench and am very careful with it.
I'd suspect samething with the Streamline seeing as I don't walk the woods with it.
Now maybe he ment "If you don't bang it around? There's no shift."
A Dreamline Lite that I put a 700 mm barrel on with no shroud, no barrel band.
And a Streamline. Streamline had a barrel band as the Guy said he needed it but I took it off and gave it back to him.
I don't have any problem with POI with the Dreamline but I only shoot bench and am very careful with it.
I'd suspect samething with the Streamline seeing as I don't walk the woods with it.
Now maybe he ment "If you don't bang it around? There's no shift."
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The deck is stacked to prevent this problem from arising. Lead has a higher coefficient of linear thermal expansion than steel…meaning the lap will shrink more than the bore as it cools. Also, the initial temperature of the lead is considerably higher than the steel.
In other words, both factors favor the lap _not_ getting stuck. The only reason a lap should ever get stuck is due to gross dimensional variation within the bore.
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So your saying the liner itself never expands when the hot lead hits it?
I'd suspect it does and could cause issues as it cools along with the lead.
Your gonna make me melt lead and measure a liner as I pour into arn't you!
I'd suspect it does and could cause issues as it cools along with the lead.
Your gonna make me melt lead and measure a liner as I pour into arn't you!
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I agree to most of your points. My silly comment was only with regard to fact i never trust whatever comes out of a CEO's mouth regarding own product is all
Sidenote: as far as you can trust stats, Gamo is still the biggest selling brand in airguns as they have been for over a decade.
You’re right, it does. However the pesky law of conservation of energy ensures the liner cannot reach the temperature of the lead. Though even if it could, the differences in their expansion coefficients will always produce a lap that is slightly smaller than the bore.
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I would determine accuracy, based on results, as opposed to what a bore looks like.
Here is a CZ 457 for example:
Here is a CZ 457 for example:
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But here we are talking about PCP guns only.I agree to most of your points. My silly comment was only with regard to fact i never trust whatever comes out of a CEO's mouth regarding own product is all
Sidenote: as far as you can trust stats, Gamo is still the biggest selling brand in airguns as they have been for over a decade.
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if what Mr. FX says was true, then there would have been no need to evolve from the three O-rings, to the carbon sleeve, to the tensioner kit complete with front support with screws... or did he put them on the market just to make money?
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I have 5
FX guns , A Wildcat MK1 with the first concept of "smooth bore" , which means a heavy barrel , 16mm od , totaly smooth until the last 10 inches at the muzzle . Never had POI shifting issues , same with the Boss . Not the same with the Crown or the Dreamline. Maverick doesn't show a lot of POI problems , probably because the barrel assembly is kept in place in a stiffer way.
I've never put a lot of trust in the "liner in a tube in a shroud ", even in the Superlight system. Last week I put a Superlight barrel .30 on my Crown , and I had the feeling that the spacer , mainly the one near the muzzle , had not a tight fit with the shroud , so I modified the system . I machined a steel tube to go around the last inch of the liner with tight fit , and to go into the end cap of the shroud , also with tight fit and epoxied . So now the end of the liner is kept in place with the shroud in a very solid way . The first groups were very good .
The drawback of this setup : air from the liner cannot enter and expand into the shroud , so the gun is louder than before.
This is maybe not THE solution to decrease POI shifting problems , I just wanted to try something.
Oh yes , I get also 4 Kalibrguns ........POI shifting problems ??? What are talking about ?
See drawing below .
FX guns , A Wildcat MK1 with the first concept of "smooth bore" , which means a heavy barrel , 16mm od , totaly smooth until the last 10 inches at the muzzle . Never had POI shifting issues , same with the Boss . Not the same with the Crown or the Dreamline. Maverick doesn't show a lot of POI problems , probably because the barrel assembly is kept in place in a stiffer way.
I've never put a lot of trust in the "liner in a tube in a shroud ", even in the Superlight system. Last week I put a Superlight barrel .30 on my Crown , and I had the feeling that the spacer , mainly the one near the muzzle , had not a tight fit with the shroud , so I modified the system . I machined a steel tube to go around the last inch of the liner with tight fit , and to go into the end cap of the shroud , also with tight fit and epoxied . So now the end of the liner is kept in place with the shroud in a very solid way . The first groups were very good .
The drawback of this setup : air from the liner cannot enter and expand into the shroud , so the gun is louder than before.
This is maybe not THE solution to decrease POI shifting problems , I just wanted to try something
.Oh yes , I get also 4 Kalibrguns ........POI shifting problems ??? What are talking about ?
See drawing below .
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As I have stated prior, I've got two Mavericks, the ONLY time I had a POI shift was when some fool neglected to make sure everything from the transfer port out was snug or....when he cleaned it. Now I don't use my guns a walking sticks but I don't baby them either even when I did something REALLY FRIGGIN' STUPID and knocked it off of the bench and it landed on the barrel, it really wasn't that far off at 30 yards and it stayed there. My guns sit in a cold garage, go outside for some exercise and surprise marginal shifting if any. I would love to hear from someone more versed in the effect of air pressure on a metal tube, does it stabilize it or is it a gimmick?
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