HOCK08 said:

Something else to note about thermal scopes. One night I was in a tree stand overlooking a small pool by a culvert that went under a road. The hogs loved to wallow in the pool when it was hot, then rub the mud off on nearby trees. We had placed a feeder there and trail cameras revealed an abundance of hogs using the area. So while I'm waiting for the hogs to show up a bullfrog starts croaking in the pool. I looked and looked through my thermal scope but couldn't see him! Why? He's the same temperature as the water! No temperature difference for the thermal to pick up on. Weird, but makes sense if you think about it. You won't see cold blooded animals in a thermal, so gators, snakes, frogs etc. will go undetected.

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I experienced this with a snake tonight. My dog was going nuts barking and I came out with my Burris BTH50 thermal hand scanner and a headlamp. I scanned and scanned and didn't see anything with my hand scanner, so I turned on the headlamp and my dog is going nuts sniffing the ground. Now I'm frustrated and fussing at the dog to show me what he is barking at. I was on a call and was advised to look at the ground for a snake. Lo and behold it was a coiled up copperhead. So after I got a good look at it in the light I tried viewing it through my thermal scanner and couldn't see anything, that is until I looked closer. What I found is that the snake was showing up black using the white hot setting. It was about 78ºF outside. I remembered someone mentioning this and thought I'd share the experience.

Sawney Bean said:

That shot like my Gamo Magnum used to. The autofeed mechanism was clipping pellets and velocities were all over the place. I tried three different magazines with the same results. Once I removed the magazine and feed mechanism however it started shooting pretty well.

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Thanks Sawney!

BassMan said:

I just got a Diana Bandit and the fill probe leaks. The first 2 times I filled it it was fine but the 3rd time once the pressure got up to about 1000 psi the outer most o-ring on the fill probe pushed part way out and leaked all the air. I replaced it with the o-rings that came with the gun but it still did the same thing. I was thinking of getting other o-rings. Has anyone else had this issue?? What size o-rings should I try??

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The o-rings on the probe need to be greased with silicone grease to prevent that from happening. Also check for a sharp edge or burr at the fill port entrance. It doesn’t take a lot to damage those o-rings.

I am wondering how has everyones experience with airforce airguns warranty repairs been? I recently sent my gun in due to the breach hanging on something internally and gouging it. My gun was 3 months old and had only been shot 3-4 times. It was in brand new condition when I sent it in. When I received it back it looked like my lower had been placed on a gun that had been dropped, scratched, and abused severely. I contacted Air Force, and they apologized. They sent me a brand new gun immediately! When I got the new gun I was going over it and realized that every screw on the entire gun was loose and one of them was stripped out. I tightened all the screws and going to figure out how to fix the stripped one. Has anyone else had any type of similar experience with Air Force air guns?

Jerkeejoe said:

Looking for some info on TJ barrels for Impact. Quality? Availability? Typical price?

Thanks in advance!

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As far as I know only Bill Great house machining has done a few for clients .. he is a member here maybe you could go from there.. Motorhead also a member he does custom work for pcp I don't know if impacts to but you could ask ..

And... as it happened it was a double post and my comment got derailed over there.........

Based on your OP I assume you don't have the FX Impact variants that using liners instead of - a simple ordinary barrel, so I will try to translate my experience with my heavy modded Impact MK2.

Uhm, from where to start? The group shape...
Usually I do these barrel tuning from a bench shooting rings @ 100 meters, possibly in a calmest day I can catch. Gun mounted on a one piece rest to minimize the user errors.... lol how easy that sounds...
With the Impact barrel/liner combination we have an option to index the liners. I have couple liners that are more bent and some less (not visible with naked eye). When I rotate the liner CW (clockwise) for example by 15 minutes, shooting 5 shots groups and monitoring how the group "size" POI is rotating around the POA.
But not only the group is rotating but I have noticed the group shape is changing when the group rotates.
I chose the group = position - that is more horizontal shape and possibly closest to scope mechanical center. With a sharpy I mark the liner, so when in future removing for cleaning I can mount it back to that position.
So my choice is a more horizontal group shape. That gives me a higher odd for better score with side winds, but also higher risk with tail/front winds. I gamble this way .

The other thing I need to add to your " >>> Regulator pressure, hammer spring tension, and pellet selection <<< " the Dwell timing... which on Impact we adjust with Valve spring tension how quickly to open the Valve and how long to keep it open. The ultimate goal with that is to have a higher burst of pressure to start accelerating the projectile but stop the air pulse inside the barrel/liner before reaches the muzzle.

I am not going to comment about "projectile" selection, based on my experience I think those not effecting the shape of the group...either works good groups - or not. But the barrel actually chose the pellets, so to find a good combination need a lot of air for disposal.
The barrel harmonics... again a long story.

I assume some other guys can chime in with non FX liners knowledge - how they do it?

97K's looking good.

And these are OK for air rifles (pistons)? No issues with double recoil?

They work well for certain applications. In my case, the wide field of view lends to quick acquisition at 40 yards and under. Although it does take some getting used to getting intimate with the ocular lens.

I told you through omission.

L.Leon said:

What ranges are you taking those chucks with that sweet GK1?

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The longest was the big one ranged at 42 yards! I'm zeroed at 30 and only need a one mil hold over at 50 yards. 33.95 JSB Mk11s at 800fps.

Thanks! I'm not even expecting 50%! I've done a little research and I'm setup for Hunter division. Only with a Notos for now. Running a Discoveryopt HT 16x scope (was impressed with it for the price). It might be a bit less than desired for range finding, but will find out about that. If I get into this I will probably consider selling my GK1 towards a better setup, but my skills can catch up to the Notos first.

iAMzehTOASTY1 said:

Ah! Did they change the photo file tpe? Errrrr?

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Those are HEVC videos. I have never seen that type before, but if you want to view it, you will need to download an extension for most browsers.

crowski said:

Since this post I scored a second lam.View attachment 509647 Crow

Did you put that kit in since July? And if you did, results? Crow

I have a 77 .20 on order at AOA for a few months now. Crow

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DAMN, that is a beautiful collection!

I just tried the AEA .30 pellets last week & was very pleased & surprised with the accuracy. Will be trying the .25's this morning on ground squirrels. Hope I get the same results.

Outstanding work Mike!!

Never let mine get low enough to...flash me !!!

Good to know though, thanks.

Mike

Had my Caldwell stable table for a few days now over all I was pleased with It but after using It for awhile I found I had no where to rest my elbow which for me made the gun less stable as I only use a tripod , with the 95 degree heat right now It was to hot to touch . So anyway bought some wood and knocked me up an alternative table top , for me this Is a lot more comfortable to shoot of off and a hell of a lot cooler to the touch . Just thought Id share this guys as It works quiet well and just as stable .

It would seem sports have come out of big venues and clubs here in Denmark, this years final in 10 M is in a library in the town of Herning.
Same place also host the final in pole vaulting, apparently in the middle of some street in Herning too.



TBH i like it, if the people do not come to the sports, bring the sports to the people.

jarmstrong said:

how much is the plenum pressure climbing? and does it affect a fifty yard shot point of impact?
this is my way of asking is it a real problem or just my OCD when I look at a gauge?

for hunting tunes, I like to have just a little more hammer spring power than needed for the plateau/knee, to over come those first shot, low velocity due to reg creep or in your case , thermal induced pressure creep

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Excellent questions (continued)! I just now talked to my buddy. He got the new maverick tune (tune is new, not the maverick) sighted in at 55 yards. Temps were probably in 80's and 90's, clear and sunny, no wind. He said that ambient temperature changes didn't have much effect on shot placement at 55 yards. BUT, going from shade to direct sunlight was driving the plenum pressure up from 161.5 to over 170 bar in fairly short periods of time and that was totally messing up his shot placement (first shots after moving into sun). Black anodized aluminum loves to soak up direct sunlight and get hot as hell. His solution so that he could take advantage of the no-wind conditions (rare) was to go get a white towel and drape it over the scope -- so the towel was also hanging down below the plenum and shading most of it. That solved the shade to sun problem. I guess we'll have to make a camo dress for the mav. I don't think there is any way I can come up with a tune that will work well at 161.5 and over 170 bar.

My mav has the 1:18 twist superior heavy liner. We're shooting nsa 54.5 gr slugs at about 935 to 955 fps (can't be sure because I don't trust my chronographs and we haven't validated yet via empiracle data on targets at different ranges). I was quite happy to hear that he shot 10 3-shot groups at different aim points on the paper and all groups were 0.5 inch or less center to center. That's way better than I expected.

stovepipe

rodjava said:

Nice prints. ABS or ASA on a Bambu?

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Thank you!
I printed in PETG, but ABS and ASA wil both probably work.
All printer settings I used can also be found in the link.

I'm here to say that the Big Air made in USA mags work great in my Notos.
Thanks David and hope your friend gets this going, I now get 90 shots before I have to reload mags

DoubleM said:

Nice groups! How do you like your Leshiy 2?

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The L2 is a fantastic gun, sorry for the late response

A happy doggo is a tired doggo, at least that is my personal firm belief.