Huben Gk1 fill and shoot psi

[Hopper]

I'm sure this has been discussed but can't find it. I know the gk1 can be filled to 5000psi but doesn't need to be. What psi under 5000psi are some of you filling?
Then what psi is safe to shoot to before needing to refill. I've seen maybe 1800psi to 2000 psi? If caliber matters I'm more interested in .25.

 

[longdog]

I’ve had a .25 long enough to run thousands of 25.39 JTS pellets through it with zero issues.
I’ve run most of ‘em at 880 with a dip to 750 every once in a while for something different.
I always fill to 300bar and shoot to 150bar.
Awesome little guns!

 

[steve-l]

Like longdog, I have shot thousands through my 25 cal. GK1s. I charge to 300 bar and shoot one mag (17) and recharge. After one mag, the tank pressure is about 210 bar. Both of my GK1s are set to 710 fps. Both guns appear happy at that power setting with very consistent velocities and accuracy. These guns will shoot one ragged hole at 25 meters. I don't, I shoot consistent 1" groups off hand at that distance. I shoot every day at least one mag. I charge the guns out of a 12 liter bottle and recharge that to 300 bar about once every 10 days.

 

[JaceSpace1369]

Like longdog, I have shot thousands through my 25 cal. GK1s. I charge to 300 bar and shoot one mag (17) and recharge. After one mag, the tank pressure is about 210 bar. Both of my GK1s are set to 710 fps. Both guns appear happy at that power setting with very consistent velocities and accuracy. These guns will shoot one ragged hole at 25 meters. I don't, I shoot consistent 1" groups off hand at that distance. I shoot every day at least one mag. I charge the guns out of a 12 liter bottle and recharge that to 300 bar about once every 10 days.

Is yours a shorty or a standard? That seems like a low shot count at those speeds from that fill

 

[steve-l]

Is yours a shorty or a standard? That seems like a low shot count at those speeds from that fill

No, both my V1 and V3 are standard length

 

[longdog]

Steve didn’t mention a shot count.
He said he refills after a mag.
I usually do the same.
I can easily get 2 mags(34 shots) if I shoot below 700fps from 300 to 150bar.

 

[Hopper]

So since these have to be filled so high does that eliminate the practical use of filling with a portable tank?
Any of you using tanks to fill your gk1? If so what size tank and how many fills are you getting?

 

[steve-l]

So since these have to be filled so high does that eliminate the practical use of filling with a portable tank?
Any of you using tanks to fill your gk1? If so what size tank and how many fills are you getting?

If you had read all my statements you would know the answer to your question. For your sake, I will restate. I refill with a 12 liter CF bottle that I charge with my Bauer compressor every 10 days or so. I shoot at least 1 magazine (17 rounds) every day. I charge the 12 liter bottle to 300 bar. Each time I shoot a mag with the GK1 adjusted to 720 fps, it takes 5 seconds to recharge the gun back to the 300 bar bottle pressure. After about 10 days, the bottle pressure will be typically 290 bar. The Bauer will then recharge the 12 liter bottle back to 300 bar in about 10 minutes.

 

[Hopper]

If you had read all my statements you would know the answer to your question. For your sake, I will restate. I refill with a 12 liter CF bottle that I charge with my Bauer compressor every 10 days or so. I shoot at least 1 magazine (17 rounds) every day. I charge the 12 liter bottle to 300 bar. Each time I shoot a mag with the GK1 adjusted to 720 fps, it takes 5 seconds to recharge the gun back to the 300 bar bottle pressure. After about 10 days, the bottle pressure will be typically 290 bar. The Bauer will then recharge the 12 liter bottle back to 300 bar in about 10 minutes.

Yep. You did answer that. Sorry I missed it and I appreciate the response. Following a couple threads on this gun and it's a bit difficult to keep up with it all.

 

[Barri_40]

En mí nueva configuración lleno a 250-260 bar y vuelvo a llenar sobre 160-170 bar después de 17 tiros todos muy constantes GK1 25 , munición JTS 25.39 velocidad 235m/s.
No te lo pienses tanto y comprala, no hay nada mejor.

 

[Shoothabreez]

I've only had my V1 .22 for a couple of weeks and have shot around a thousand pellets. It likes JSB 15.9 going roughly 660 fps. I'm getting 3 magazines, 680~640 fps. Starting at 300bar & ending around 150bar.

 

[WobblyHand]

My V3 .22 as received, shot Norma 17.6 domes around 900 fps (32fpe). It also shoots cast 28.4 grain slugs at 777 fps (38fpe) at the same setting. I start at 30MPa and stop around 12-15MPa. My GX-E-L2 pump only goes to 30MPa, so that's my starting pressure.