Marauder 25.....has anyone fixed their barrel to be NOT floating?

[K.O.]

^ Oh good grief  ^

I  However, with my free floating Synrod, my barrel is not centered in the free floating barrel band.  Yes I loosened the set screws and I can rotate the barrel band clockwise and counterclockwise and center it up that way but when the rifle is level, the barrel is high in the band.  Not touching, but high.  With the rifle vertical, the shroud nearly touches the o-ring in the factory barrel band.  With that much difference, my POI is going to change when I shoot at a squirrel on the ground or a bird in a tree.  If nothing else, POI will change vertically.

I do not know why your barrel/shroud assembly is moving around that much but it should not be doing that.

 

some shroud tubes if tight to the breech it can shift poi... Did very slightly on one of mine...if fact both of my .25 Mrods are more accurate when the shroud does not touch the Breech...the shroud support tight against the breech while snugging the grub screw yes... but the shroud itself nope...

I think may be because perfectly level tubing ends can be hard to do...

[K.O.]

Have a .22 Buccaneer and Gamo Urban that do not mind being tied down by their barrel bands... My Buccaneer .177 demands to be free floated... same with my .25 Mrods...they just do not like an oring or the craft foam...

[3crows]

My best accuracy with my MRods has been with the barrel and shroud free floating with no barrel band at all*. And, the rifles set up in such way did not have a POI change. But, I am a hunter, not a target bench shooter, and I kept bumping the barrel on the Jeep door or getting the barrel caught in brush and just decided that despite no change in POI thus far, it was only a matter of time until I knocked it wonky. I guess what finally did it for me was that I tripped in a beaver tunnel, my leg went through, and I fell and nearly dropped my MRod. So, I returned to a barrel band to limit movement should I take a fall. My Urban, I removed the barrel band and bonded the barrel with a carbon fiber tube, it is plenty stiff and never changes POI. I may do the same in the future with a Marauder and get rid of the shroud entirely and along with it, the barrel bands of any sort.



If Item 19 is loose (grub screw loose?) or a poor fit to the barrel/breech that could explain a shift between horizontal and vertical? Item 8 should fit tight on the barrel and the O-ring 9 should be a slip fit (just barely touching) in the ID of the shroud. I cannot say for the .177 or .22 but the .25 barrel is pretty sturdy and can easily support the weight of the shroud with minimal POI shift. Now, if hanging a suppressor out there and all of it cantilevered without any support, then I could see a shift from horizontal to vertical.

* Actually, my best accuracy was with the shroud removed, a bare barrel, and nothing pushing, pulling or tugging on the barrel. The .25 Marauder barrel is capable of supporting itself, especially if I were to bond a carbon fiber tube(s) to the barrel. Then thread the end for 1/2X20 accessories. Yes, a .25 Marauder turned up a bit and those GTO 16 grain pellets makes an impressive bark and a most satisfying supersonic crack !

[K.O.]

My Bucs are 1/2 unf threaded and wear partial shrouds made with Crosman baffles and carbon tube... same poi and accuracy with or without the shrouds.

[K.O.]

oh mine one tuned to a bone stock 45-47 ish fpe... the other has a spring change and exhaust port work for a 60 ish fpe tune for the heavier stuff...

[bear air]

I put Hill barrel bands on mine. It seems to keep the poi shifts to a minimum.

[mobilemail]

Is it just me, or does anyone wonder why Crosman doesn't make the barrel band fit in the first place? They are making these things our of aluminum anyway, it doesn't seem like it would be a huge CNC adjustment to just start making them differently. (Coming from one who can't even spell CNC...)  It would be much less expensive punching them out en masse than making one by one like Tim Hill does (who, BTW, makes an excellent product).  And they would sell a bunch in aftermarket upgrades to existing owners, so it seems a production change would pay for itself.

Hello?  Crosman?   Is this mic on??

[3crows]

I think the answer is that they claim the barrel is free floated. But it is not free floated, it is free hanging and there are just too many parts hanging around out there .

In defense of the Marauder. The Marauder is not exactly the only PCP with this issue. Let's see, the JTS Aircudie, the Barra, the Impact, the Maverick, the Avenger, now the Avenger X, the Gauntlet, oh, what else, hmmm. I think anything with a shroud with a liner inside is going to have a POI change day to day.

And, yes, we can spend all this money, $30 for a printed band or .05 cents for an O-ring, and at the end of the day all we have is an all metal, nice shooting, reasonably powerful, simple to work on, parts available, Crosman answers the phone, made in the USA, rifle that is actually heirloom quality as it will out last five leaking Impacts and all of them will need a lot more than a .05 cents O-ring stuffed under the barrel band to fix their POI issue.

What is heirloom quality, well, hard to put in words, I just know it when I see it, something like this 60 years old and still functioning Crosman 140 that I got for Christmas 1962? And there is no reason that a Marauder will not still function 60 years from now. It is something you can purchase, shoot for a lifetime and then hand down and in all cases it is not made in China.

[triggertreat]

Is it just me, or does anyone wonder why Crosman doesn't make the barrel band fit in the first place? They are making these things our of aluminum anyway, it doesn't seem like it would be a huge CNC adjustment to just start making them differently. (Coming from one who can't even spell CNC...)  It would be much less expensive punching them out en masse than making one by one like Tim Hill does (who, BTW, makes an excellent product).  And they would sell a bunch in aftermarket upgrades to existing owners, so it seems a production change would pay for itself.

Hello?  Crosman?   Is this mic on? ?

A very good point you make, Mark.  I guess this is the way the Crosman engineers wanted the shroud to be for whatever reasons.

I only place a lubed O-ring inside the barrel band so when bumping around or leaning against a tree my POI doesn't shift.  There is still some room for the shroud to flex a bit especially with having the O-ring lubed.

IMO the lubed O-ring works well.  I haven't had to fool with my shroud in several years now.  My POI seems to always be good.  Now with this said I do always run with the same ammo that is weight sorted and I run a tune that is well with a 2% ES along with using a Hammer forged barrel.  All of this together adds up to an impressive, reliable (unregulated) shooting .22 Marauder.

I remember bouncing around testing different ammo and always had terrible results and was constantly fighting accuracy issues.  I think sticking with the same (soft) ammo is the way to go along with not cleaning the barrel so often.  The exception being my MMHF barrel which is extremely tight in comparison to an OEM barrel from Crosman.

[Motorhead]

I would NEVER use a 3D printed barrel band !!!    Thermo plastics shape shift as in grow & shrink with temperature changes.
Not a darn thing wrong with the factory aluminum band .. nothing !!

[avator]

I would NEVER use a 3D printed barrel band !!!    Thermo plastics shape shift as in grow & shrink with temperature changes.
Not a darn thing wrong with the factory aluminum band .. nothing !!

WOW... lots of aftermarket 3D printed parts being used these days. I wonder how many of us are experiencing adverse results because of this.

[3crows]

I would NEVER use a 3D printed barrel band !!!    Thermo plastics shape shift as in grow & shrink with temperature changes.
Not a darn thing wrong with the factory aluminum band .. nothing !!

WOW... lots of aftermarket 3D printed parts being used these days. I wonder how many of us are experiencing adverse results because of this.

Mine are fine, the ABS plastic is fine. I do plan an aluminum band or Delrin at some point but priorities. The OE band is not secure and is much too loose a fit and even with foam tape and an O-ring can move, certainly at least as much as the ABS printed plastic does if not more. The big problem with the OE band (for me) is that it fits around the fill assembly and not the air reservoir and my JSAR high rise breech does not have the same center of bore. That necessitates a new barrel band or no barrel band regardless of how fine and dandy the OE band is or is not. I do not shoot beyond 50 yards. Nothing I need to hunt or rid myself can be ethically taken with a .25 caliber pellet beyond that distance IMO and my opinion is the only one that counts when I pull the trigger on a living thing even if the living thing is pesteriferous vermin. If I were shooting target matches for beer, yes, I would want a metal barrel band. But in such case, I would possibly have no band and no shroud because I like beer and I like winning.

[Motorhead]

I would NEVER use a 3D printed barrel band !!!    Thermo plastics shape shift as in grow & shrink with temperature changes.
Not a darn thing wrong with the factory aluminum band .. nothing !!

WOW... lots of aftermarket 3D printed parts being used these days. I wonder how many of us are experiencing adverse results because of this.

Being used because folks buy them because there inexpensive / cheap .... Generally on inexpensive guns where accuracy they get/give is acceptable.
Not going to get into a peeing match over this .... I will keep my opinion on this no matter the user groups counter opinion 

[avator]

I would NEVER use a 3D printed barrel band !!!    Thermo plastics shape shift as in grow & shrink with temperature changes.
Not a darn thing wrong with the factory aluminum band .. nothing !!

WOW... lots of aftermarket 3D printed parts being used these days. I wonder how many of us are experiencing adverse results because of this.

Being used because folks buy them because there inexpensive / cheap .... Generally on inexpensive guns where accuracy they get/give is acceptable.
Not going to get into a peeing match over this .... I will keep my opinion on this no matter the user groups counter opinion 

Scott, I wasn't doubting or disputing your opinion.. you're a heck of a lot more qualified on the matter than I. I was just realizing how much of it is being used.

[Motorhead]

I would NEVER use a 3D printed barrel band !!!    Thermo plastics shape shift as in grow & shrink with temperature changes.
Not a darn thing wrong with the factory aluminum band .. nothing !!

WOW... lots of aftermarket 3D printed parts being used these days. I wonder how many of us are experiencing adverse results because of this.

Being used because folks buy them because there inexpensive / cheap .... Generally on inexpensive guns where accuracy they get/give is acceptable.
Not going to get into a peeing match over this .... I will keep my opinion on this no matter the user groups counter opinion 

Scott, I wasn't doubting or disputing your opinion.. you're a heck of a lot more qualified on the matter than I. I was just realizing how much of it is being used.

It's all good ... no issues here