FX STX vs Superior liner

[Dr.Kera]

Fx STX vs Superior liner (according to me!...).
*STX = Rifling are little deeper, from chamber to muzzle end grooves are uniform and end abruptly (bore are choke), the pallet flight takes the shape of polygony impression.
*Superior liner= Chamber ends are totally round which resize the imperfect sized pallet, muzzle end also round (but not flare) which send off the pallet in full round contour (instead of rigged rifling mark around the pallet) which may be better aerodynamic in flight, the round segment end do not disturbed the pallet spinning patten because it's just a segment of ring at the very end.
Verdict is till now no one really knows what barrel is better than which, but their approach of Superior liner is something. At least that exact can't be reproduced in a solid barrel type except in metal tube reshaping process which FX liners are doing (let's just say they're taking full advantage of their innovation )

 

[F6Hawk]

The STX barrels are only rifled the last 1.5 inches as the pellet is exiting the muzzle. The twist rate is very slow twist because pellets don't need as much centrifugal force to stabilize in flight.

ETA: I was mixing up the ST and STX barrels. Sorry for the confusion.

The owner/developer of FX discusses it at the time I have marked in this video:

 

[Long_Gun_Dallas]

Thats the smooth twist that only has rifling at the end. The ST is also a solid barrel, not a liner system. The stx has full rifling. I'm pretty sure my superiors also have full rifling. Maybe the newest iterations do not? I can check my .30 and .22 tomorrow. Bought when superiors recently were introduced. Both extremely good barrels regardless.

Fwiw I have st, stx, and superior barrels. Here is the ST on my Crown. It is an old mk1 impact take-off. Pre-dates the Crown, but fits it at least in the areas that are needed for it to function correctly.

 

[F6Hawk]

Found this pic of the Superior liners:

 

[Long_Gun_Dallas]

A little digging seems to indicate the rifling on the superiors is done from the rear forward. Where the STX was done front the front rearward. Images seem to indicate the rifling impression is reduced toward the muzzle where my stx ones seemed to have a uniform amount of rifling throughout.

 

[Dr.Kera]

The STX barrels are only rifled the last 1.5 inches as the pellet is exiting the muzzle. The twist rate is very slow twist because pellets don't need as much centrifugal force to stabilize in flight.

ETA: I was mixing up the ST and STX barrels. Sorry for the confusion.

The owner/developer of FX discusses it at the time I have marked in this video:

Yes the twist rate were slower, ideal for higher velocity tuning without creating too much spin

 

[Dr.Kera]

Found this pic of the Superior liners:

View attachment 439872

Notice those imprint indent ring on both end? Yes that's for that I've described

 

[Dr.Kera]

A little digging seems to indicate the rifling on the superiors is done from the rear forward. Where the STX was done front the front rearward. Images seem to indicate the rifling impression is reduced toward the muzzle where my stx ones seemed to have a uniform amount of rifling throughout.

Actually rifling till front end were same except till half inch toward the end and replace by that indent ring in ur Superior liner also

 

[SilentSquirrel]

Please pardon my penchant for joining conversations about things I know very little.
Explain to me please the differences between the Superior, ST, and STX barrels.
Also
Which of them is the Superlight?

Thanks
Edward

 

[Dr.Kera]

Please pardon my penchant for joining conversations about things I know very little.
Explain to me please the differences between the Superior, ST, and STX barrels.
Also
Which of them is the Superlight?

Thanks
Edward

no problem... Any query is healthy, even myself is new to barrel liner system. Anything that's liner inside with sleeves around will be lighter. Heard that ST (smooth twist) were made out of solid barrel so that will be of course heavier, Superior liner and STX will be similar in their weight in similar length

 

[Long_Gun_Dallas]

St was a solid barrel. Came primarily on the royales, boss, and early impacts. As well as some others. Bore is smooth almost the whole way till about an inch and a half from the exit where there is a small amount of rifling.

The superlight does not have a steel liner retaining tube or bore retaining nut. The superhight barrels have a thin aluminum shroud and the liners are held inside the barrel at the breech end with a jamb nut and some orings that crush to grip it in place. The rest of the liner floats on co posite spacers inside of the shroud. Instead of a steel tube. The weight difference is noticeable. And on a long gun such as a Crown, any weight removed from the barrel is extremely noticeable in the way the gun carries and handles.

For instance, my 30cal barrel is a normal stx barrel. The entire shroud extends and has an air stripper inside of it as well as an expansion chamber that opens when extended. Actually pretty effective for moderation. So effective, I've never fit a moderator to it. Both my stx .22 barrels are superlights. Shroud is fixed, does not extend. Has no air stripper, just a thread adaptor and protector.

Here is under the shroud of a superlight, has carbon reinforcing tube bonded to liner, doesn't come this way.

Here is the older type extended. Don't have any photos of mine extended or opened up.

 

[Long_Gun_Dallas]

So, interestingly enough, my superior .30 has full rifling. The .22 is VERY smooth toward the muzzle, but still a hint of rifling there. But, yeah almost, like the opposite of the ST barrels. Rifling seems pretty normal then abruptly smooths out about 1.5" from the exit.

I use a 380mm pellet A stx more than anything. Always been a laser, never had a desire to shoot slugs from the short barrel.

 

[Dr.Kera]

St was a solid barrel. Came primarily on the royales, boss, and early impacts. As well as some others. Bore is smooth almost the whole way till about an inch and a half from the exit where there is a small amount of rifling.

The superlight does not have a steel liner retaining tube or bore retaining nut. The superhight barrels have a thin aluminum shroud and the liners are held inside the barrel at the breech end with a jamb nut and some orings that crush to grip it in place. The rest of the liner floats on co posite spacers inside of the shroud. Instead of a steel tube. The weight difference is noticeable. And on a long gun such as a Crown, any weight removed from the barrel is extremely noticeable in the way the gun carries and handles.

For instance, my 30cal barrel is a normal stx barrel. The entire shroud extends and has an air stripper inside of it as well as an expansion chamber that opens when extended. Actually pretty effective for moderation. So effective, I've never fit a moderator to it. Both my stx .22 barrels are superlights. Shroud is fixed, does not extend. Has no air stripper, just a thread adaptor and protector.

Here is under the shroud of a superlight, has carbon reinforcing tube bonded to liner, doesn't come this way.
View attachment 440127

Here is the older type extended. Don't have any photos of mine extended or opened up.
View attachment 440128

Talk about the shroud extented chamber, and coincidently myself working on it right now, do it gives any changes with accuracy in high power? Or just supress more sound? If not then I'd prefer keeping my gun shorter sacrificing for a little louder sound, also any idea if extend the shroud with perforated Oring disk support at barrel Jamnut screw will serve better over extented perforated tube till the end of the shroud cap, because depend on that I need to decide how the barrel shroud need to sit sturdy

 

[Long_Gun_Dallas]

I really don't think theres much if anything to be gained other than noise reduction. I'm sure the internal air stripper helps but it's in use regardless of extended or not..

 

[Dr.Kera]

I really don't think theres much if anything to be gained other than noise reduction. I'm sure the internal air stripper helps but it's in use regardless of extended or not..

Ok then the shorter version I'll go, without extended space. Air stripper without the extended space means which sits in the circumference space between the barrel sleeves and shroud right?

 

[Long_Gun_Dallas]

With shroud retracted, the space is closed, the air stripper basically mounts behind this space and threads onto the end of the liner tube.

 

[Dr.Kera]

With shroud retracted, the space is closed, the air stripper basically mounts behind this space and threads onto the end of the liner tube.

.... Several smaller holes or bigger fewer holes will be better for air stripper? I've seen some stripper holes bored perpendicular, some angled one side, while some also angled another side; I hope we'r on the same chapter bdw!

 

[Long_Gun_Dallas]

IDK to be fair. I'd assume they all work, but I'd choose larger holes. The importaint part is a small hole for the projectile to pass thru. Moderators act as air stripper as well. Only photo I could find, and it's broken (not mine) but this is what's inside the shroud.

 

[Dr.Kera]

IDK to be fair. I'd assume they all work, but I'd choose larger holes. The importaint part is a small hole for the projectile to pass thru. Moderators act as air stripper as well. Only photo I could find, and it's broken (not mine) but this is what's inside the shroud. View attachment 440792

.. That's the one with space gap, I'll do the other way 20Unf male front, 20unf female behind, shroud cap thread around

 

[Dr.Kera]

.. That's the one with space gap, I'll do the other way 20Unf male front, 20unf female behind, shroud cap thread around