Hi Guys, I recently purchased an FX Panthera HC in .30. Got the 10 for 10 from Pyramyd & upon reading it they ended up using 44 grain jsbs & got about an average of 67 FPE of energy. (They had the reg set @ 100 bar)..Since then I decided to turn up the regulator to around 140 then 150 & am now getting around 85-90 FPE with 50 gr's sligs hitting @ around 880-900fps... The gun seems to like slugs better than it does pellets even though it does have a small barrel I've added an impulse 1350 moderator with an extra cone insert as well as the non tapered extension piece so it lines up directly with the barrel flush from A of A. Getting about a clip to a clip and a half with the regulator @ 150.. have a couple questions about using a bigger bottle on the front. I don't want to make the gun too heavy but I would like some more air on hand while using the foldable stock option that I use. Any suggestions would help me as to a 480cc, 580cc or even 700cc bottle? Also I know that it says that 250bar is max on these guns.. but I've heard of people going up to 300bar with the new FX bottles.. (just don't know how safe that is!) also would like to know if I NEED the tungsten hammer and heavier spring kit to get the velocities/power that were advertised for this particular gun which the energy report from FX is 107 FPE. So I'm looking for another 20 or so FPE... Also I've never have installed such item/s and then wondering how hot it would be to install. I'll post a couple pictures and having a hard time downloading my chronograph measurements to my phone for some reason but I can come up with the shot string as well hopefully. Basically what I'm looking for is obviously high as shot count and highest power for this will be used for dispatching coyotes. I currently have just a Trijcon Mro Red Dot the top of it but will be soon running a ffp Vortex 3-15X50 on it with high rings. Then we'll be using a 90° angle Weaver picatinny for the Red Dot just in case something is closer. All/most hunting that will be done will be (150 yards max)...Any questions comments and concerns I greatly appreciated. Goal is to get This rifle gets rather long really quick once adding a moderator in folding out the stock all the way goes from 26 inches I believe folded without moderator to 42 or so inches completely folded out all the way out and with moderator on. But I will tell you this this particular moderator is stupid quiet! I also like it because it's made in the USA unlike some other companies. Thanks, Surefire!
... Also I ended up going with the Panthera Hunter compact version of the bottom rail. I'm wondering if I could have put in a larger bottom rail on that normally fits the regular Panthera, I just didn't want to order the wrong part at the time. But if the screws line up I definitely would like to go with a longer bottom real as well so I don't have to get a Saber Tactical 60 mm bottle clamp just to attach a nice Troy industries ranger style vertical foregrip. I also went with a Wilson combat sports rare buttstock which sits beautifully in combination with what that I have! But like I said I would love the extra real space as well as the bigger bottle. Thanks again! Oh one more thing I forgot to mention. I ended up loading some Hunter's choice 80 grain slugs.. got low to mid 700's in FPE.. they chambered very hard and was definitely too heavy of a slug to use but I just wanted to experiment a bit. This gun is definitely not set up for heavy slugs at the moment and even with the heavy slug barrel liner, I don't see me getting much extra power out of that particular setup but who knows as you said it's a short barrel to begin with and even with those modifications I don't expect to be shooting those particular slugs that fast.. even though if we look at the specs from FX they state that they were using a 68. something grain slug to achieve the 117 FPE. Perhaps they forgot to mention that they also put a heavy slug barrel liner in as well as a heavier spring and tungsten hammer & valve setup... Perhaps they should have prior to selling this gun. Because perhaps if they did I might have went with something else. But I ended up picking this thing up for around $1,400 bucks brand new! & So far am impressed with the way it shoots Feels and handles! Just wished the power that they advertised was what I was getting right out of the box! Even if I had to mess with the regulated settings it's still would not have been a problem. But when I first got it the right was set to around 100ish and the shot string came back at 67 FPE Max on the 10 for 10! In my head I was like that's exactly what the 25 Cal stated for power! And if that was the case I would have went with the 25 caliber for it's a bit shorter and still has the bigger 120cc plenum. I've still yet to see any caliber change kits as well ... Not sure if you have at all?