Panthera FX Panthera MKII .30 700mm My First FX

[Pumacarl]

A little disappointed, I received the new pellet liner and carbon fiber tube today. The carbon fiber tube does not fit. It gets stuck part way in. I ended up using the one that came with the rifle. I guess I won’t be gluing the liners into the tubes anytime soon lol.

Well that is a bummer. I have been in similar situations and in weighing my options had decided to try something rather than do nothing. If the part doesn't fit, make it fit. What else are you going to do with the tube, right? All that is needed is to oversize the interior so that it will slide over the liner. It doesn't have to be a great fit, the epoxy will fill all the gaps. If you are saying that the carbon fiber tube won't fit into the steel barrel tube, than sand down the exterior of the carbon fiber tube. I know that I don't have to tell you, but I will mention it for others, wear a filtered mask, the dust is dangerous. This is just my opion on it. I mean why not? Nothing magical about any of this stuff.

 

[Billm]

Well that is a bummer. I have been in similar situations and in weighing my options had decided to try something rather than do nothing. If the part doesn't fit, make it fit. What else are you going to do with the tube, right? All that is needed is to oversize the interior so that it will slide over the liner. It doesn't have to be a great fit, the epoxy will fill all the gaps. If you are saying that the carbon fiber tube won't fit into the steel barrel tube, than sand down the exterior of the carbon fiber tube. I know that I don't have to tell you, but I will mention it for others, wear a filtered mask, the dust is dangerous. This is just my opion on it. I mean why not? Nothing magical about any of this stuff.

I was thinking the same thing. It just pees me off lol. I went through a lot with this order. First shipment didn’t include the liner or tube. Then when I went to try a new tin of 65gr pellets from the same order, they forgot to pack those too. Eventually it was all taken care of and I reordered the liner and tube and the tube doesn’t fit. I’m jinxed with airgun shipments lol.

 

[Billm]

The one thing that I’m not real happy with, performance wise with the Panthera, is the SD. The velocity consistency pales in comparison to all my other airguns except the regulated Beeman underlever. At this point, I’m expecting @Pumacarl to pop up with: “you should’ve ordered the Huma regulator”.

 

[Billm]

I’m going to increase the hammer a little and see if that helps. I may have taken it down too far. This is two mags of 13. It was a fresh slow fill from a bottle at 300bar. I waited an hour before shooting. First shot is always a throwaway. Shot 14 is first shot of second mag. It was a minute or so after the first mag. It was dark so I had to quit.

 

[Pumacarl]

Well, you already nailed it for what I was going to say. Just know that I did smooth out the bellville washers in my Huma reg, and you could try that with yours, couldn't hurt. You also need to wait at least five seconds between shots with a Amp reg. A Huma is a little better by a second or two but even with it I do wait until I see the bar guage stop moving. The other thing to think about is that slugs are way more precise than pellets, they have to be to work at all. My ELR and AM slugs have no variation, they all weigh the same and are the same size. There isn't any weighing or sorting needed. That, and not just the Huma, has a lot to do with why I have 0 to 3 Sd's. Only the Hyper Lines are bad in my gun and I am pretty positive that the fault there is with them and not the gun.

 

[Billm]

Well, you already nailed it for what I was going to say. Just know that I did smooth out the bellville washers in my Huma reg, and you could try that with yours, couldn't hurt. You also need to wait at least five seconds between shots with an Amp reg. A Huma is a little better by a second or two but even with it I do wait until I see the bar guage stop moving. The other thing to think about is that slugs are way more precise than pellets, they have to be to work at all. My ELR and AM slugs have no variation, they all weigh the same and are the same size. There isn't any weighing or sorting needed. That, and not just the Huma, has a lot to do with why I have 0 to 3 Sd's. Only the Hyper Lines are bad in my gun and I am pretty positive that the fault there is with them and not the gun.

Yeah, I’ll probably spring for a Huma if there’s no improvement. I’m also going to drop the reg back to 110bar and drop the velocity back down to 890ish. I’ll give it some more time to settle. I probably do shoot too fast, I’ll slow down and will watch the gauges.

 

[Pumacarl]

I will add, that I like running regulators between 150 - 165b, wether I need to or not. I just think that they work better under load, and I like a quick hit of air and a closed valve. This always worked better for me than trying to turn down the pressure and getting more shots. I like accurate shots, period, that way I don't need many. Just my opinion on it.
edit: I also think that using a higher pressure in combination with a faster hammer hit is better for consistency. Everything is working to it's upper limit and the locktimes are faster and it aids startup inertia. In rimfire shooting I had a guage to measure rim thickness because that would effect locktime of ignition, and I sorted Eley rimfire ammo. Locktime is way more important with air so I try to maximize everything.

 

[Solo1]

According to matt the valve actually works better that way

 

[Solo1]

Its funny how he tells some things but not others. According to utah the drs needs a hammer and spring to work above 140 bar yet in matts vid hes running 170 bar and same with geharts which was at 150.

 

[Billm]

I’m reducing it, because I believe I may be corkscrewing. With the FX having so much power, I just fell into shooting at 930-990fps. The Sonoran shoots the AEAs best at between 850-900. My last mag shot another circular group, which just seems too odd to be a coincidence. It happened the other day too. This was with the 1:40 liner, which I doubt likes 950+ fps. I didn’t take a photo tonight becaut was dark. But, it’s on the steel and so I will tomorrow. Basically a shot string that forms a circular string instead of a cluster.

 

[mavarch0]

To original poster, is it possible to give some feedback on the liner replacement process, is it easy to do? also the schematic provided by fx is a little confusing. are both the carbon sleeve (17) and barrel housing (7) installed, or only one of them, they seem to have same diameter. also there's an o-ring with code 17 on the schematic but not on the list.
am interested to get the new dynamic but there's zero information by fx on how to replace components for caliber change.

https://www.fxairguns.com/media/rrepycjd/dynamix-panthera-mkii-barrel-system.pdf

 

[Billm]

It’s a very easy process to swap the liners. There are several videos that step you through it. The barrel housing is part of the solid bull barrel and does not use the carbon tube. The solid bull barrel is an optional accessory. I don’t know what that o-ring is. There are no o-rings used with the liner when using the carbon tube.
*****WARNING *****
YOU SHOULD WATCH A VIDEO PRIOR TO REPLACING THE BARREL LINER. IF DONE PROPERLY, YOU DONT NEED TO DEGAS THE RIFLE. IF DONE IMPROPERLY YOU RISK THE EXPLOSIVE RELEASE OF AIR FROM THE PLENUM!!!!!!!!

In a nutshell: you unscrew and remove the shroud, unscrew the the liner/shroud bushing, remove the liner lock and finally the liner and carbon tube come out together. If done properly it takes 5-10 minutes.

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[mavarch0]

It’s a very easy process to swap the liners. There are several videos that step you through it. The barrel housing is part of the solid bull barrel and does not use the carbon tube. The solid bull barrel is an optional accessory. I don’t know what that o-ring is. There are no o-rings used with the liner when using the carbon tube.
*****WARNING *****
YOU SHOULD WATCH A VIDEO PRIOR TO REPLACING THE BARREL LINER. IF DONE PROPERLY, YOU DONT NEED TO DEGAS THE RIFLE. IF DONE IMPROPERLY YOU RISK THE EXPLOSIVE RELEASE OF AIR FROM THE PLENUM!!!!!!!!

In a nutshell: you unscrew and remove the shroud, unscrew the the liner/shroud bushing, remove the liner lock and finally the liner and carbon tube come out together. If done properly it takes 5-10 minutes.

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For more detailed information, see our cookies page.

Accept third party cookies

Bill thank you for the fast feedback and the details provided. much appreciated.
I feel a little more confident now to go ahead with this

 

[Billm]

Bill thank you for the fast feedback and the details provided. much appreciated.
I feel a little more confident now to go ahead with this

You’re welcome. It really is very easy to do.

 

[Billm]

Bill thank you for the fast feedback and the details provided. much appreciated.
I feel a little more confident now to go ahead with this

Something to keep in mind if you do purchase the Dynamic MKII: FX is skittish about providing much of any “How To” type info in their documentation, apparently in an attempt to protect themselves from product liability. But, they do have some videos and there are videos by others on YouTube. There’s almost zero mkII specific information anywhere. That’s part of my reasoning for posting some of this minutiae.

 

[mavarch0]

Something to keep in mind if you do purchase the Dynamic MKII: FX is skittish about providing much of any “How To” type info in their documentation, apparently in an attempt to protect themselves from product liability. But, they do have some videos and there videos by others on YouTube. There’s almost zero mkII specific information anywhere. That’s part of my reasoning for posting some of this minutiae.

I noticed that as well. I hope more and more owners start sharing their experience, I will try to do that too.
you are probably one of the first owners to share your experience, many thanks for that.

 

[Billm]

I wasn’t impressed with the pellet liner. But, as I thought, it’s just too easy to overdrive the pellets with the Panthera MKII ands it’s plenum . I’ve slowly lowered the reg pressure and now I’m at 90ish bar. I’m launching the AEA 45gr pellets at 890-900fps and the groups are getting better. It’s really hard to say how much better. I have an 18mph crosswind gusting to 21mph. The SD is still somewhat disappointing compared to my other rifles. If it doesn’t settle down, I’ll pull the reg and inspect the washers as suggested. If that doesn’t work, I’ll probably purchase the Huma regulator. Before, I do that, I’ll try a different tune. I’m using a 95% tune, my other rifles are using a 96,5-97% tune. I’m wondering if a 97% tune with a little heavier hammer action might help?
Maybe the pellet liner is not that bad lol.

 

[Solo1]

@Billm id go the other way back off hammer lots turn up reg

 

[Billm]

@Billm id go the other way back off hammer lots turn up reg

I’m going to wait for the wind to drop, before I make any changes. It’s grouping pretty good considering the wind. But, on the flip side, it’s so windy I can’t tell what’s the rifle and what’s the wind lol.

 

[Solo1]

I’m going to wait for the wind to drop, before I make any changes. It’s grouping pretty good considering the wind. But, on the flip side, it’s so windy I can’t tell what’s the rifle and what’s the wind lol.

The wind is the thing to beat! Today id get 1 to the left so i hold for it next shot and the moxxxxxxxxer goes right where i aimed! Ahhhhh