Here is an other spin off thread for the Huben pistol where members can share what ammo they have found works good,....... or bad in their hand cannon.
Huben Huben pistol ammo choice.
- Thread starter Nomadic Pirate 66
- Start date
How does it do? I’m really on the fence of doing that with the 25 rifle because I just can’t find anything lighter than the 34g that shoot well. Always one or two fliers in a mag. It’s relegated to slug gun status with a night optic, which means that I rarely use it.
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This liner being 1:14 twist rate is better suited for heavy ammo. The light slugs were doing 1” groups at 50 yards. Not the best but still decent. I bought some Altaros smooth ATP slugs (49.5gr) that did much better. 1/2”-3/4” groups at 50.
If the k1 was in a carbine stock I would be more accurate. I’m much more comfortable with a traditional style stock than a bullpup.
If the k1 was in a carbine stock I would be more accurate. I’m much more comfortable with a traditional style stock than a bullpup.
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Got myself 2 packs of Zan .253 38gr slugs today. These stay put in the magazine. But it is a pretty tight fit. Anyone know if this is okay for a gun like this? Will there be too much pressure build-up to push the projectile from the magazine into the barrel? Just making sure I don't blow out the valve or anything like that, haha
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Nosotros probamos los Zan de 33 grain 253, encajan bien en el cargador y los JSB MK2 slugs también funcionan bien en el cargador, aunque creo que las GK1 son pistolas de Diábolos.
saludos.
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Those of you looking for some gto pellets for your gk1 should checkout Utahairguns.com. they were significantly cheaper than any other place including pyramydair.com. I saved $100 over pyramydair.com when I placed my order. Have a happy Thanksgiving everyone! 
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I’ve just got my GK1 .22 and tried the JSB Jumbo Monster Redesigned 5.52mm 25.39 grain as recommended by the local shop.
I seated the pellets with a pencil, so they ‘clicked’ into the mag. I rotated the mag after loading all the pellets. I also held the GK1 pointed upwards and shook it a bit: all the pellets remained in place.
First 15 shots went well (900 to 890 fps) but on the 16th shot it blasted all the air out (50bar remaining, started with 270bar). There was no sign of a jam: I could rotate the mag freely. The remaining pellets all looked OK and there was no sign of lead shavings. After a re-fill the 3 remaining (loose) pellets fired without issues.
I did notice the remaining pellets were able to move inside the mag: shaking the pistol would make them shift back and forth inside the mag.. I guess they ‘unseated’ during shooting?
For my info: was this a ‘jam’ or was this something else? (As I would expect a jam would mean I wouldn’t be able to rotate the mag afterwards until the jam has been cleared.)
And when talking about ‘snug fitting’ ammo: they should remain seated, right? Unable to move even after shooting some rounds?
I’ve some more ammo to try, I guess I should try something bigger than 5.52
I seated the pellets with a pencil, so they ‘clicked’ into the mag. I rotated the mag after loading all the pellets. I also held the GK1 pointed upwards and shook it a bit: all the pellets remained in place.
First 15 shots went well (900 to 890 fps) but on the 16th shot it blasted all the air out (50bar remaining, started with 270bar). There was no sign of a jam: I could rotate the mag freely. The remaining pellets all looked OK and there was no sign of lead shavings. After a re-fill the 3 remaining (loose) pellets fired without issues.
I did notice the remaining pellets were able to move inside the mag: shaking the pistol would make them shift back and forth inside the mag.. I guess they ‘unseated’ during shooting?
For my info: was this a ‘jam’ or was this something else? (As I would expect a jam would mean I wouldn’t be able to rotate the mag afterwards until the jam has been cleared.)
And when talking about ‘snug fitting’ ammo: they should remain seated, right? Unable to move even after shooting some rounds?
I’ve some more ammo to try, I guess I should try something bigger than 5.52
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I've just got my GK1 .22 and tried the JSB Jumbo Monster Redesigned 5.52mm 25.39 grain as recommended by the local shop.
I seated the pellets with a pencil, so they 'clicked' into the mag. I rotated the mag after loading all the pellets. I also held the GK1 pointed upwards and shook it a bit: all the pellets remained in place.
First 15 shots went well (900 to 890 fps) but on the 16th shot it blasted all the air out (50bar remaining, started with 270bar). There was no sign of a jam: I could rotate the mag freely. The remaining pellets all looked OK and there was no sign of lead shavings. After a re-fill the 3 remaining (loose) pellets fired without issues.
I did notice the remaining pellets were able to move inside the mag: shaking the pistol would make them shift back and forth inside the mag.. I guess they 'unseated' during shooting?
For my info: was this a 'jam' or was this something else? (As I would expect a jam would mean I wouldn't be able to rotate the mag afterwards until the jam has been cleared.)
And when talking about 'snug fitting' ammo: they should remain seated, right? Unable to move even after shooting some rounds?
I've some more love to try, I guess I should try something bigger than 5.52
I think you may have shot the GK1 with pressure too low. Other's may chime in with a better explainanation, tho.
In my first 'hour' of the GK1 .22, I had a similar experience testing how many shots I could get with a 250 bar fill. I also got a loud bark and blast of air. I assumed I shot it with too low a pressure.
After that experience, I've never shot my GK1 .22 below 145-150 bar. And now over 2,000 shots later, not one problem! I've shot JSB/JTS 18's, 21's, 25's and some slugs. All shoot great. However, all pellets are seated.
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Thanks for your reply!
Now that you mention it; I kept track of the pressure for the first 7 - 8 shots.. It did not drop very quickly so I got distracted by the semi shooting experience (yay!) And the pressure drops faster (per shot) when the pressure gets lower and lower during shooting. So it might have dropped too low indeed.
But will that result in dropping all the air? I was under the impression that the mag stops rotating around 120bar? I doubt if I got to 120bar..
But good point, I’ll have another go soon and keep a better eye on the pressure. (I’m lowering the power also, because -dang- it’s loud and powerfull)
Now that you mention it; I kept track of the pressure for the first 7 - 8 shots.. It did not drop very quickly so I got distracted by the semi shooting experience (yay!)
And the pressure drops faster (per shot) when the pressure gets lower and lower during shooting. So it might have dropped too low indeed.But will that result in dropping all the air? I was under the impression that the mag stops rotating around 120bar? I doubt if I got to 120bar..
But good point, I’ll have another go soon and keep a better eye on the pressure. (I’m lowering the power also, because -dang- it’s loud and powerfull
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Buenas tardes.Acabo de comprar mi GK1 .22 y probé el JSB Jumbo Monster Rediseñado 5,52 mm 25,39 grano recomendado por la tienda local.
Coloqué los perdigones con un lápiz, para que hicieran clic en el cargador. Giré el cargador después de cargar todos los perdigones. También sostuve el GK1 apuntando hacia arriba y lo sacudí un poco: todos los perdigones permanecieron en su lugar.
Los primeros 15 disparos salieron bien (de 900 a 890 fps), pero en el disparo 16 expulsó todo el aire (quedaban 50 bares, comenzó con 270 bares). No había señales de atasco: podía girar el cargador libremente. Todos los perdigones restantes parecían estar bien y no había señales de virutas de plomo. Después de volver a llenar, los 3 perdigones restantes (sueltos) se dispararon sin problemas.
Me di cuenta de que los perdigones restantes podían moverse dentro del cargador: agitar la pistola los haría moverse hacia adelante y hacia atrás dentro del cargador. ¿Supongo que se "desplazaron" durante el disparo?
Para mi información: ¿fue esto un 'ataque' o fue algo más? (Como era de esperar, un atasco significaría que no podría girar el cargador después hasta que se haya solucionado el atasco).
Y cuando se habla de munición "que ajusta bien": deberían permanecer sentados, ¿verdad? ¿No puedes moverte incluso después de disparar algunas rondas?
Tengo más munición para probar, supongo que debería probar algo más grande que 5,52.
Intenta disparar JTS son de lo mejor para la GK1 en precisión y entra muy ajustados para que no se atasque y vigile la presión, si disparas con potencia no debe de bajar la presión por debajo de 130 bares.
Sigue estás recomendaciones y disfrutarás mucho de tu GK1.
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PCPFanNL I think you're correct that we *should* be able to go down to 120-130 bar with no GK1 .22 issues.
I stop at the 145-150 bar mark, as that's where one full mag leaves me from a 250 bar fill. Since I'm usually shooting in the 30-35 FPE range (1.5 turns out), I'll never get two full mags before needing air. So, I might as well just shoot one mag, reload, air up, and shoot again., and never worry about fill pressure.
I stop at the 145-150 bar mark, as that's where one full mag leaves me from a 250 bar fill. Since I'm usually shooting in the 30-35 FPE range (1.5 turns out), I'll never get two full mags before needing air. So, I might as well just shoot one mag, reload, air up, and shoot again., and never worry about fill pressure.
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Thanks, noted!
Do you mean the ‘JTS Dead Center’ pellets? And what grain would you recommend?
Yeah that sounds good, thanks!
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Si JTS Dead Center, 18, 21,53,22,07 etc.
no te formarán atascos si los asientas ligeramente y de precisión un 10 excelente.
Saludos.
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Did shot a couple of mags with .251 44grainers.
I was expecting those would fall into the barrel while filling the mag (like on my K1), but that didn't happen.
.254 is a must for my K1, but this is definetely not the case for the GK1.
I was expecting those would fall into the barrel while filling the mag (like on my K1), but that didn't happen.
.254 is a must for my K1, but this is definetely not the case for the GK1.
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Supposedly people are doing well with 44gr H&N heavy slugs,even though they are only .250…I’ll find out tommorow when my Gk-1 arrives and report
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Anecdotes or actual evidence of them shooting accurately? Moreover, why not just use the correct size? I mean, you wouldn’t do this with a pair of shoes, right? I hope.
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I guess a little of both..I watched a “youtuber” shoot them and one of the dealers (ares) recommends them on their website etc.my GK gets here tomorrow and i’ll run a mag of them and let you know.My main choices are AVS 40/44gr flat in .254 and the NSA .254’s
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If I’m thinking of the same YouTuber, he normally makes a point to demonstrate accuracy and I noticed that in this case, it was (conspicuously) absent. I can’t remember his YT channel name. Anyway, these experiments have already been conducted with the rifle ad infinitum which has the same barrel dimensions. There’s no need to repeat failed experiments, but if you insist, you should be aware that undersized slugs can be diabolically inaccurate, as was observed with the K1.
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Has anyone slugged these barrels to determine the actual size of the bore? I searched and found nothing...
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Did Gregor mention or was it someone else's video...That the diameter should be the same as bullpups.
This is just how I imagine. But it would make sense. However, that does not guarantee that it is a fact. It seems to be quite difficult to do barrel slugging vs normal airgun because the magazine does not come off.
I am also interested in getting factual information. It's a shame that such essential information is not indicated in the user manual or on the manufacturer's website...Or nowhere.
This is just how I imagine. But it would make sense. However, that does not guarantee that it is a fact. It seems to be quite difficult to do barrel slugging vs normal airgun because the magazine does not come off.
I am also interested in getting factual information. It's a shame that such essential information is not indicated in the user manual or on the manufacturer's website...Or nowhere.
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