Huben Huben GK1 not precise at all. What I am doing wrong?

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Savagefox

Savagefox

Member
Sep 7, 2018
151
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Spain, Spain
I finally put some serious time to the pistol, and no matter what I do, I can't get good groups.

I tried many pellet shapes and power configs, the best results seem to be with some norica light slugs (1.8gr) at around 20 joule, yet the pistol shoots out of the group when she feels like it. I'm using tripod and resting bag, 10 meters, and it's a disaster.

Even more, changing pellet or power config means not only a slight comprehensible deviation, but not even hitting the board and re-starting again.

Laser boresight adjustment... useless even as a reference, leaving a perfect pellet + power config that more or less works (yet she always puts random shoots far out the group) and next day it changed completelly the POI. It's exasperating and I'm about to give up, and yes I cleaned the barrel, shoot with and without silencer etc...

I am behing too exigent with the pistol? Because I have 50 buck plinkers more precise than this and I'm feeling ripped off. Some of your shoot results on the treath are more or less comparable with mine, but some that have putted a dim tight group... with what pellet power config?

Is it just that it is very picky with ammo?
 
Is there a screw loose? An o-ring that needs replacing? I'd do a full disassembly on it, wipe it all down, silicone grease/oil where it needs it, and put it back together. Sounds like when I first started out with my first springer a couple decades ago where I didn't screw down the scope properly and so the shots were hitting every which way. Or my Avenge-X where it would group nicely in one spot, then a couple shots later group somewhere else and the speeds were not nearly as consistent as when I first got it. That issue was the o-rings in the regulator were hard and needed replacing. Probably some water in the reg too but I can't be sure.
 
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Savagefox said:
I finally put some serious time to the pistol, and no matter what I do, I can't get good groups.

I tried many pellet shapes and power configs, the best results seem to be with some norica light slugs (1.8gr) at around 20 joule, yet the pistol shoots out of the group when she feels like it. I'm using tripod and resting bag, 10 meters, and it's a disaster.

Even more, changing pellet or power config means not only a slight comprehensible deviation, but not even hitting the board and re-starting again.

Laser boresight adjustment... useless even as a reference, leaving a perfect pellet + power config that more or less works (yet she always puts random shoots far out the group) and next day it changed completelly the POI. It's exasperating and I'm about to give up, and yes I cleaned the barrel, shoot with and without silencer etc...

I am behing too exigent with the pistol? Because I have 50 buck plinkers more precise than this and I'm feeling ripped off. Some of your shoot results on the treath are more or less comparable with mine, but some that have putted a dim tight group... with what pellet power config?

Is it just that it is very picky with ammo?
Click to expand...
What caliber?
 
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miksatx said:
What caliber?
Click to expand...
.22

droyd said:
Is there a screw loose? An o-ring that needs replacing? I'd do a full disassembly on it, wipe it all down, silicone grease/oil where it needs it, and put it back together. Sounds like when I first started out with my first springer a couple decades ago where I didn't screw down the scope properly and so the shots were hitting every which way. Or my Avenge-X where it would group nicely in one spot, then a couple shots later group somewhere else and the speeds were not nearly as consistent as when I first got it. That issue was the o-rings in the regulator were hard and needed replacing. Probably some water in the reg too but I can't be sure.
Click to expand...

Open sights, 10 meter range, unregulated V1 version.

I don't ''feel'' inconsistency on the output, as I tunned just the right power for the pellets to not bounce back at me from the playwood.

I have to adjust windage very far from center, the barrel is definitelly not straight.
 
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Pix of mine seated pellets.

PXL_20250614_183839797.jpg
 
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ctshooter said:
I haven't heard a moderator mentioned - are you using one? Could be some cliping. Have you tried shooting bare barrel?

My other thought is the alignment of the magazine and barrel are off - have you see any shaving of lead around the mag area?
Click to expand...
It does sound like it is not centering the magazine with the barrel each time. Several things to look at there... could be from lack of lube in the bearing area, or lead shavings causing dragging of the magazine, or the lack of lubing of the mechanical catch and rollers that ride on the magazine.
 
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Airgun-hobbyist said:
It does sound like it is not centering the magazine with the barrel each time. Several things to look at there... could be from lack of lube in the bearing area, or lead shavings causing dragging of the magazine, or the lack of lubing of the mechanical catch and rollers that ride on the magazine.
Click to expand...

So I will have to dissasemble all the damn thing... poop.
 
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Savagefox said:
So I will have to dissasemble all the damn thing... poop.
Click to expand...
I'd suggest getting used to disassembly for the fact that it is a semi auto, and as such with all of it's moving parts, pins and rollers, should be regularly maintained and lubed to operate smoothly. I think you'll be pleasantly surprised as to the difference in the trigger pull with a cleaning and lubing of the pins, which will help you with accuracy as well.
 
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