Huben GK1 in .22 or .25?

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Should I get the GK1 in .22 or .25? And which projectiles (head size) should I stock up on?

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steve-l said:
MIchael a reflex sight is the only way to go, but going to the rail adaptor you chose sets the sight height too high above the barrel. This sets up the requirement to hold over the target at close range. I tried several different reflex sights and mounts and I now use a reflex sight that has a 2mm dot and 12 different intensity settings. I found this best for all light conditions. I also use an adaptor that converts the 11mm rail to a 22 mm rail without raising the sight height. They use two wedges and are very inexpensive. I now shoot my GK1's more than any other airgun and I am considering another one in 177 for low power pesting. You will be incredibly impressed with their accuracy and trigger. I feel they are every bit as accurate as a 10 meter Olympic pistol with a lot more power.
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I mounted one with the dovetail adapter, and one with the picatinny adapter. It looks like the picatinny adapter is only 0.13” taller. Do you really think it’ll make the holdover that much worse?

IMG_0797.jpeg
 
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Michael said:
I mounted one with the dovetail adapter, and one with the picatinny adapter. It looks like the picatinny adapter is only 0.13” taller. Do you really think it’ll make the holdover that much worse?

View attachment 554997
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The difference will be negligible, if any. I do prefer the look of the sights with a removable base though. I tried a few adapters and while they all worked ok this one looks the cleanest and is the sturdiest. It’s designed to perfectly fit into where the rear sight mounts.

IMG_1853.jpeg
 
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Pale_Rider said:
The difference will be negligible, if any. I do prefer the look of the sights with a removable base though. I tried a few adapters and while they all worked ok this one looks the cleanest and is the sturdiest. It’s designed to perfectly fit into where the rear sight mounts.

View attachment 555004
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That’s clean!
 
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Michael said:
I mounted one with the dovetail adapter, and one with the picatinny adapter. It looks like the picatinny adapter is only 0.13” taller. Do you really think it’ll make the holdover that much worse?

View attachment 554997
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It is a personal thing. Target acquisition must be fast and instinctive when pesting. .13 inches makes a big difference to me. The beauty of a reflex sight is the ability to still see the target when using hold over, but the correct amount changes rapidly with distance the greater the height differential between glass center and barrel center and that makes guessing a lot more difficult. I was so concerned with this I mounted a laser on my PP700SA that was .5" left of barrel center and adjusted dead parallel to the barrel. This worked perfectly, but in practice, I had trouble using it. That issue was mine alone. That solution technically was perfect. It allowed me to actually see the correct hold over requirement when both sights were working together.
 
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Michael said:
I just received the .25 caliber GK1. Holy smokes this thing is ridiculously cool! Initial feelings are that I'm super impressed with the build quality, the power to air consumption ratio, and the trigger (which seems to best all the other semi-auto airguns I've tried).

I went down to AirStryke Industries on Saturday and picked up a dovetail to picatinny rail. I'm gonna mount that and this Hawke Frontier Reflex dot.

View attachment 553670

I can't wait to put it on target!
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GK1 in .25 is the only airgun pistol I have used that you can actually point shoot at pistol distances.
Why not try just using it stock you may find you like it without any tacticool optics at all..
 
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steve-l said:
MIchael a reflex sight is the only way to go, but going to the rail adaptor you chose sets the sight height too high above the barrel. This sets up the requirement to hold over the target at close range. I tried several different reflex sights and mounts and I now use a reflex sight that has a 2mm dot and 12 different intensity settings. I found this best for all light conditions. I also use an adaptor that converts the 11mm rail to a 22 mm rail without raising the sight height. They use two wedges and are very inexpensive. I now shoot my GK1's more than any other airgun and I am considering another one in 177 for low power pesting. You will be incredibly impressed with their accuracy and trigger. I feel they are every bit as accurate as a 10 meter Olympic pistol with a lot more power.
Click to expand...


Steve,

for your low mounted optics solution — how low did you get it?
What number would you punch into a ballistic calculator for "scope height"?

Matthias
 
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steve-l said:
Mattias,
AliExpress for all parts including the 2mm reflex sight. My glass center to barrel center distance is 29 mm.
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Wow, 29mm is really low! 👍🏼

I have a dot sight with a tube on it, with adjustable turrets (I am such a die-hard dialer....):
A Leupold Freedom RDS 1x34.
I got it down to 39mm scope height.
At my current power of 15FPE (in .22cal), and with a killzone of 1" —
I get a PBR of 6.5—35y.

With your 29mm scope height, that would give me a PBR of 4.4—33y (2y closer yet for those extra short shots — I just missed a pigeon a couple of days ago because of that...🤦🏻‍♂️).

Matthias
 
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steve-l said:
Michael,
First it is a pistol, not a rifle. Pistols are typically used at short distances. The GK1 is NOT a plinker. It is powerful enough to damage unintended infrastructure. I own a V1 and a V3 in .25 and have hit pigeons at 100 meters. It is also a revolver and its munition retention in the magazine is a chamfer machined into the magazine's bores that catch the skirts of pellets. Slugs do not have a skirt and the only way they can be retained is friction. In other words, the gun is not designed to use slugs, nor do slugs at the intended short distances, add any value., only more cost If your intended use is for high power and exceptional accuracy is your requirement, then the .25 is superior to the .22 . The GK1 is also loud. It needs a good moderator. The higher the power selected, the louder it is. Only you know your intended purpose. Your call.
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Curious. At 100m and pigeons, are you hitting it pretty much dead on if your technique is fine or do you hit one every now and then? Wondering what type of groupings this is capable of at 100m. Remarkable for a pistol, regardless.
 
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SmackDaddy said:
i have .177
and when I want to smack some metal at 25yds to 35yds, using 8-10gr
I need to open the power knob to 800fps which means only good 3 mags which goes like in few minutes.😒
I can’t imagine how few shots .22 or .25 would give to a user!!!
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The way I have mine tuned in .25 I get 3 mags of 17 rounds, but velocity is starting to drop off near the end of the third mag. I don't remember the exact velocity or kinetic energy I have it tuned at, but I believe it's at around 25 fpe. I lost my shooting data when I had to replace my phone and I haven't chronoed it again yet.

If I were to do it again then I'd probably opt for .22. I'd rather have the extra shots than the extra thump, but I'm still pretty pleased with it.
 
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Sawney Bean said:
The way I have mine tuned in .25 I get 3 mags of 17 rounds, but velocity is starting to drop off near the end of the third mag. I don't remember the exact velocity or kinetic energy I have it tuned at, but I believe it's at around 25 fpe. I lost my shooting data when I had to replace my phone and I haven't chronoed it again yet.

If I were to do it again then I'd probably opt for .22. I'd rather have the extra shots than the extra thump, but I'm still pretty pleased with it.
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Does one actually get extra shots with the .22? It seems that all calibers can be tuned to X number of shots one may desire by simply adjusting the power?
 
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Ultralight said:
Does one actually get extra shots with the .22? It seems that all calibers can be tuned to X number of shots one may desire by simply adjusting the power?
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Yes and no. You’ll get more shots at a given velocity and less at a given power. So if you want to tune it to 800 fps then you’ll get more shots at that velocity with a smaller caliber. If you want to tune it to 30 fpe then you’ll probably get more shots with a larger caliber. Larger calibers tend to deliver more shots at a given power level.
 
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Sawney Bean said:
Yes and no. You’ll get more shots at a given velocity and less at a given power. So if you want to tune it to 800 fps then you’ll get more shots at that velocity with a smaller caliber. If you want to tune it to 30 fpe then you’ll probably get more shots with a larger caliber. Larger calibers tend to deliver more shots at a given power level.
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Excellent. Perfect. Appreciate your helping me with my understanding.
 
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Ultralight said:
Curious. At 100m and pigeons, are you hitting it pretty much dead on if your technique is fine or do you hit one every now and then? Wondering what type of groupings this is capable of at 100m. Remarkable for a pistol, regardless.
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Of course I don't hit them every time. It is a pistol, but every time I get their undivided attention. I use about 24" of holdover at 100 meters, a little less if the bird is high in a tree. My gun is zeroed at 25 meters and I usually use JSB 25.4gr .25 pellets at 700 fps. With this same setup I hold 1" groups off hand at 25 meters.
 
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