Really enjoying this Pro Sport. Came to me with ARH softer spring installed. Making about 10.5 FPE with AA 8.4. Strange thing on chrono though. Three separate strings, two different pellet types (used AA 7.87 for one string). 9 of 10 shots are single digit ES, but each string had one shot with where FPS dropped and ES was 15 or 16. And it’s audible, Kim was sitting beside me for one and asked what happened. Sounds like the first shot on a CO2 gun when it starts running out. Gun was shot very little prior to me acquiring so I wouldn’t expect worn seals. If it was put together with excess tar could it cause this? And I was thinking the ARH softer kit would run about 11.5 FPE. Only thing I can think of but I don’t know this power plant well. Going to put another couple hundred pellets through it and if it doesn’t clear up I’ll take it apart. Just wondering if there’s anything particular I should look for. Thanks.
Air Arms Pro Sport Question
- Thread starter cjtamu
- Start date
That is an odd pattern. One outlier shot out of a dozen or so may be consistent with some dieseling caused by a bit of grease getting in front of the piston seal. If so, it should burn off with more shooting. If it persists, the PS is very easy to strip down and re-lube if that is necessary.
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I’d be looking at breech seal or pellet seating as the explanation. Not that I’ve owned too many under levers or an Air arms per se but that’s where I would start.
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Yeah, but if it was occasional dieseling causing the issue I’d expect the speed to jump up, not down. Pellets seat consistently. Just has the one shot that’s low then bam, right back where it should be. I don’t think this gun has a tin of pellets through it. Could be a defective breech seal I guess. See what happens after it gets more pellets through. Had to put it and the 97 away tonight because my 35E was getting jealous ha ha ha.
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A ProSport may be considered by many to be the Cadillac of spring piston airguns; but it's still a spring piston airgun, with all of the positive and negative attributes common to all spring piston air rifles.
Shoot it. Put 1,000 - 1,500 pellets through it and see if it settles down about that. Like all spring piston air rifles, they need to be shot to settle in.
Our ProSport was absolutely horrible for the first 15 months we had it. Very harsh shot cycle up here at 9,000' ASL. But it seems to have settled into the harsh mountain environment we live in, and has mostly redeemed itself this year. Although our HW97K "performs" better up here, and I can shoot farther with it accurately, I'd still rather shoot the ProSport over it any day of the week.
Give it time. Be happy with it. And enjoy it.
They're nice guns, and much better engineered than anything Weihrauch makes, IMO.
I hope this helps.
Shoot it. Put 1,000 - 1,500 pellets through it and see if it settles down about that. Like all spring piston air rifles, they need to be shot to settle in.
Our ProSport was absolutely horrible for the first 15 months we had it. Very harsh shot cycle up here at 9,000' ASL. But it seems to have settled into the harsh mountain environment we live in, and has mostly redeemed itself this year. Although our HW97K "performs" better up here, and I can shoot farther with it accurately, I'd still rather shoot the ProSport over it any day of the week.
Give it time. Be happy with it. And enjoy it.
They're nice guns, and much better engineered than anything Weihrauch makes, IMO.
I hope this helps.
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Just snatch it down clean inspect fresh lube and re shoot . Especially if unknown or sitting around in a closet gun . Just maybe dry
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I missed that detail. Yes, dieseling would typically cause the FPE to jump up, not down. As with a strip down, it is pretty easy to swap breech seals on the PS if that is the source of the problem.
Just curious, which ARH spring are you using in your PS? I have a Vortek 12fpe kit in mine now, but generally prefer ARH springs.
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This is what you should do. Spring guns need to be shot and I mean a lot. So until you have 2000 pellets through it and it does not matter what kit is installed your going to have flyers.
You so you know I am not blowing smoke, I have currently own tx200’s, HW80’s, HW30’s, HW77, Diana 48, Diana 350, Diana 350 ntec, and all have needed at least 2 tins of pellets before they settle in and that’s the quick and easy. Shoot the heck out of it and then shoot it some more.
And for the love of everything do t take it apart every 20 shots because it doesn’t produce pcp accurate representation. Leave it together and shoot it and let it wear in. Then you will see accurate representation
You so you know I am not blowing smoke, I have currently own tx200’s, HW80’s, HW30’s, HW77, Diana 48, Diana 350, Diana 350 ntec, and all have needed at least 2 tins of pellets before they settle in and that’s the quick and easy. Shoot the heck out of it and then shoot it some more.
And for the love of everything do t take it apart every 20 shots because it doesn’t produce pcp accurate representation. Leave it together and shoot it and let it wear in. Then you will see accurate representation
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I'd check your breech seals: 1st with the tissue method, 2nd remember that the Pro Sport has TWO breech seals. One may be daamaged. Cheap and easy to replace. An unused springer's seals just dry out from lack of use. As has been said above . . . shoot that gun!. Orv.
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He only makes two springs for the TX/PS/SR. I didn’t install this one but it’s the softer spring. Shot cycle is beautiful, if not for the occasional “pffft” and it would be perfect. @extradrygin2001 I own more than half the rifles you listed. Except my 48 is a 52 Luxus. And then there are the 97 long, 35E, HW55, HW45, 56 T/H, Diana 34, 35, 45, 75, FWB 124… Except for the 75, which I won’t touch, I’ve taken most of them apart and repaired, maintained, and tuned as needed. With the exception of a couple leather sealed guns my springers run single digit ES and have never taken two tins to get there. It’s not lack of springer knowledge that has me asking questions, it’s lack of experience with the AA power plant, which is a unique animal. And the fact that of the 25+ springers I own, this is the only one that’s ever made a noise like a depleted CO2 gun every 10 shots or so. Wouldn’t care about the ES if that sound didn’t come with it.
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I read this and took my pro sport for some quick shooting. It had been a long time since I shot it, and forgot how hard it is to cock, until I remembered the best way for me. When I first got it I was handling it entirely wrong. Somehow I was grasping the cocking lever with my right hand and my left ended up wrapped around the forearm. It was hot and I was getting sweaty and the lever slipped and hit my left thumb, fracturing it. Orthopod said it was best to let it heal on its own and I would loose some movement which I did, but no big deal. I since learned right hand on pistol grip, butt on my upper thigh,and left on the lever and one quick stroke to cock.
Anyway about fifteen shots then broke out my AA 200Tx, and it is so much easier to cock, It was probably 8-10 months since I have shot either but the Hawke Airmax scopes were still zeroed for my rather casual shooting style. Sitting in a steel mesh patio chair with a rocking motion, one leg crossed and my left elbow on that leg for support. Definitely not a fine accuracy check but a quick and dirty fun check.
It's cooling off some here, but still rather warm, temp in upper 80's, and high humidity. When I started sweating I quit and came in.
When I got these two guns, which are walnut stocked, I was amazed at the quality of the wood. The TX200 has a lot of burl in the buttstock and some tigerstripe in the forearm, the ProSport is a somewhat dramatic sweeping grain, light and dark. Both were somewhat light colored so I treaded with some tung oil/turpentine mix about two years ago and they have darkened to a nice more amber color really showing the grain highlights now
My only complaint about them is that they are very heavy, more for shooting sitting like I was or off a bench. I do have 4 FWB target rifles that are heavier but the stocks are designed more for offhand shooting, especially with the palm rests I have for them.
Anyway about fifteen shots then broke out my AA 200Tx, and it is so much easier to cock, It was probably 8-10 months since I have shot either but the Hawke Airmax scopes were still zeroed for my rather casual shooting style. Sitting in a steel mesh patio chair with a rocking motion, one leg crossed and my left elbow on that leg for support. Definitely not a fine accuracy check but a quick and dirty fun check.
It's cooling off some here, but still rather warm, temp in upper 80's, and high humidity. When I started sweating I quit and came in.
When I got these two guns, which are walnut stocked, I was amazed at the quality of the wood. The TX200 has a lot of burl in the buttstock and some tigerstripe in the forearm, the ProSport is a somewhat dramatic sweeping grain, light and dark. Both were somewhat light colored so I treaded with some tung oil/turpentine mix about two years ago and they have darkened to a nice more amber color really showing the grain highlights now
My only complaint about them is that they are very heavy, more for shooting sitting like I was or off a bench. I do have 4 FWB target rifles that are heavier but the stocks are designed more for offhand shooting, especially with the palm rests I have for them.
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TX breech seals are 108 Buna-N 70 shore. I would replace them and see, they are a wear item on the TX.
I put a 70 on the bottom and 90 shore on top. It wears much better with the 90 against the barrel and I picked up some fps too.
I put a 70 on the bottom and 90 shore on top. It wears much better with the 90 against the barrel and I picked up some fps too.
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It needs to be disassembled, I'm almost certain the seal burned out due to excess grease. Because of the diesel, a small hole often burns into the seals, which is why you sometimes hear this sound. I have seen this many times on European seals from Vado. They were good seals, but they could not withstand diesel, and it seems they are no longer made. Once upon a time you could buy them on eBay. Just my guess.
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Believe you and Jay308 may be correct about the seals. Better understanding of the power plant now and that’s what makes the most sense. But, I don’t think dieseling is the cause. No smoke, no smell, super smooth and actually shooting about where it should be or just a hair below power and speed wise. As he stated, it is apparently a known issue with the TX200. Found a thread from couple years back where Motörhead and some others discussed. Sounds like a tension/lockup issue similar to what you see with improperly adjusted Diana sidelever. Cocking linkage on the Pro Sport is different than the TX200 and I’m not sure if it’s similarly afflicted but certainly could be. And I think this gun sat for 7+ years, probably with the breech fully closed, so could have deformed the seals. Replacements on the way. Need to suss out a piston seal just in case. With 9 good shots out of 10 the gun is already better than I but might as well make it perfect so I’m completely out of excuses
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