Replacement barrel for a CFX?

[daved]

I'm looking for a .177 LW or HW choked barrel machined to fit a Gamo CFX.  And before anyone suggests RIM, I've already tried him, no joy.  Any other suggestions?  Gene, do you do barrel work?

After trying a lot of things, I'm convinced the barrel that's on it is over spec, or that a previous owner was far too aggressive in the cleaning department.  It's a decent shooter if I all I wanted was a 700 fps (or slower) target gun, but nothing I do will get it to 800 fps, and trying just makes it extremely harsh, and causes piston slam.  But the CFX was my first, and still one of my favorite, springers.  Thus the search for a new barrel, because I know they can and will do close to 900 fps when set up properly, and still be smooth and consistent.  Later.

Dave

[CharlieDaTuna]

Gotta tell ya Dave... the CFX's that shoot 900+ fps and be consistant are few and far between. There are some out there that may/will do it but usually not for long.  It all has to do with the rotary breech seal design. A fairly good number fot the CFX is between 820 and 870 fps. A good many will not reach even that, more like 750-800.

I don't think changing out the barrel will resolve the problem for you or give you what you are looking for.

[Gene_SC]

LOL Dave, I thought I warned everyone about RIM.. hehe  For sure not a good source for L/W barrels...:) Been there and done that with him a few years back.. I was not a happy camper either..:) Bob is certainly right about the CFX. Like he said even if you get high FPS it will deminish as the rotary breech seal degrades or comes appart.

I do not even take in CFX tunes any longer because of rotary breech issue.

But I do have a L/W  barrel. I have had it for a few years. Can't remember if it is a .177 or .22 but you can have it if you like. Will check it and let you know which cal it is.

[shady816]

don't feel bad daved I am sinking in the same cfx boat, I have changed the breech seal I have no idea how many times but even when she was down it was only down to 700 -720 fps but when up mine pushes mid 900's but I also use the gas ram. now what I will say for the barrel mine is crap check the gamo post of mine for cfx, it is very aperant their barrels are cheap mine would not hit anything over 20 yards only to find after removing the muzzle break the pellets were digging into inside of the break then after chopping the thing recrowned the barrel and saw the bore so far off center it was pathetic then after putting all this together and shot in at 10 yards the pattern would spread out to the right more and more the farther you move back say 20 -30 40 yards until eventually I have no clue were the pellets are hitting so I give up and will no longer try to make it correct for now on this will be the gun I wade thru swamps,drop,kick and roll around in the dirt with until it completely dies or coughs up  some internal parts. I just wish before I had bought mine someone would have stepped up and said how much of a piece of %@#&! they were but unfortunately all i heard was good things. i'm sorry i'm just angry with mine right now, i needed to vent.  i feel better but i still need a new airgun.

[Gene_SC]

My experience with accuracy on CFX air guns has been nothing but great. I have owned a few of them and still have two left.  Generally a CFX fixed barrel is very accurate unless you mess with them...:)  The issue with a gas ram in the CFX is that it will over power the rotary breech seal. It will blow air past the o'ring. It is better to use a spring instead of a gas ram for sure on the CFX.

[shady816]

i wish i could say that for mine but unfortunatly "NOT"  but all is not lost i will pick up a used break barrel gamo to make use of a 100$ gas ram and try to forget this cfx expierince ever happed.

[shadow]

I've also had great success with my CFX.22, very  accurate and dropped it's share of Bandits and Country Rat's. I haven't done a thing to her, no tune nothing. She twangs some when shot but it's so accurate and all I'm not going to open her up unless she runs out of steam. Ed

[daved]

I remember, Gene, I had an "interesting" run in with him, myself.  Definitely not my first choice, but he was the only one I could think of at the time.  Regarding that barrel, if it's a .177, I'd be happy to take it off your hands, Gene.  Not interested in a .22, I don't like the loopy trajectory a mid power springer produces in that category, and I can't shoot the magnum springers worth a damn :-).  Besides, I had one of the .22 CFX's when they first became available again, didn't like it, although it was the last springer I sold when I switched to the Dark Side.

Regarding CFX velocity, I guess my first one was the exception.  After Bob tuned it, it was doing 895 with Gamo Hunters.  After the spring collapsed, I installed a Theoben gas ram, last I heard, it was still doing a very consistent 900 fps with Superdomes.  And yes, I did a LOT of work getting the rotary breech sorted out :-).  I'm not expecting miracles, but I learned a thing or two about the rotary breech with my first CFX, so I'm pretty sure I should be able to get this one into the mid 800's at least, and still have a good shot cycle.  And if I'm wrong, I KNOW I can make it a sweet 700 fps shooter.  

I know the barrel in my current one is crap, pushing a pellet through the bore will barely engrave the skirt, and doesn't touch the head.  Pellets just drop into the breech, and will drop out again if you turn the muzzle up before closing the breech.  All the previous CFX's I've shot required at least a slight push to fully seat the pellet.  I really believe that a previous owner (not the one I got it from) was way too aggressive with an abrasive bore cleaner.  

The previous owner was convinced this rifle was cursed (why do I keep buying cursed rifles?), but I've regretted letting my first one go, so was happy to add one to my small collection.  Now I just want to get it shooting the way I know it can.  Let me know on that barrel, Gene.  Later.

Dave

[shady816]

well after a night to think on it and cool down a little I decided to go ahead with finishing the gun which will require a new barrel to satisfy me so I removed the factory barrel this morning and ordered a new Lothar Walther barrel. now I know some a probably shacking there heads but my wife bought me this gun and is the only contribution to this hobby and started my addiction to air guns so this one has sentimental value and I will never part with it so as long as I own it,it will have to perform at the best she can do or I will never quit trying. I will post photo's and document the entire project the barrel will be here in three weeks.

[daved]

Where did you order the barrel from, Robert, and is it already machined to fit, or can you do the machining yourself?  Glad to hear you cooled off and decided to give it a second chance.  I think the CFX is a great rifle, even with the weak link of the rotary breech, and I know they can be extremely accurate.  In some ways, of the four rifles I have on hand, the CFX is the easiest to shoot well.  And the 4 include a tuned Diana 34 and TX 200, and a soon to be tuned Beeman R9.  I gave my first CFX to my little brother, just to force myself to shoot my then new to me Beeman HW 77.  These things can run in some pretty fast company.  They're good guns, and although you may never recover what you spend in resale, you'll get it back in spades in shootability IMO.  Looking forward to the barrel swap posts.  Later.

Dave

[shady816]

Hi daved       I ordered strait from LW I had to submit a inquiry first then they got back to me by email and the barrel comes as a blank without crown or threading and I will be doing all the machine work myself ,I am currently trying to figure out the thread count on the barrel it has to be odd because it matches nothing I or fastenal has.

[kiwi]

shady816 - 4/10/2010  5:45 AM

Hi daved       I ordered strait from LW I had to submit a inquiry first then they got back to me by email and the barrel comes as a blank without crown or threading and I will be doing all the machine work myself ,I am currently trying to figure out the thread count on the barrel it has to be odd because it matches nothing I or fastenal has.

My Kral which is a copy of the CFX has a " JIS " thread on the barrel....Well thats the closest thread gauge
that would match it...

Pete

[shady816]

the thread is 13mm x 1.0 it is a odd one but die's are available. here is a cool website for sizing and thread count with printable charts for comparison. http://www.boltdepot.com/fastener-information/Printable-Tools/Default.aspx

[kiwi]

shady816 - 4/10/2010  12:26 PM

the thread is 13mm x 1.0 it is a odd one but die's are available. here is a cool website for sizing and thread count with printable charts for comparison. http://www.boltdepot.com/fastener-information/Printable-Tools/Default.aspx

DIE ?....lathe man lathe....
13mm X 1mm  bloody hell thats fine...

[shady816]

ya i will be using the lathe i just didn't know if my lathe had the correct gears for that speed but i'm in luck all the gears were  there and they state the gear placement for 1.0 on the label so i will be threading on the lathe no die.