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.
I only tested once when I first got it, before it got set to very low power. The results with 50gr were:I would also be grateful to anyone who can post a shot string from a chronograph with ~50grain slugs shooting from 300-350bar. I’m just wondering, based on my Korean cliff (which I’d like to repeat before publishing), if my .22 is anomalous in that regard, relative to the .25.
Phew! Yes, based on that slope, the plateau of the power curve is well above your starting pressure.I only tested once when I first got it, before it got set to very low power. The results with 50gr were:
fps - bar - fpe
891 - 350 - 88
868 - 330 - 84
848 - 310 - 80
828 - 290 - 76
798 - 265 - 71
770 - 240 - 66
753 - 225 - 63
x - 205
I stopped before I saw a flat portion, because I thought the speed was getting too low anyway- but there probably isn't one, at this power level.
This matches closely with the effective fpe results in this video (with 44gr):
interesting! The velocity was still ascending when the pressure got down to 200bar?At the power levels I am shooting at, I get a decent string.
Today I started at 350 bar, with the 28.5gr VK, and started at 770fps. It went up to 812, and ended the first mag there, at around 200 bar. I was refilling at that point, because I wanted to shoot full mags. I am not sure how far up it would go at that setting, but likely rise higher before dropping down.
Shot these targets at 25 yards with a green dot - black circle is 2 inches...:
View attachment 415523
Si lo mismomin Europa no veo disponibles los GTO, hay estos que parecen lo mismo, si alguien lo puede aclarar?
Saludos.
View attachment 417379
Im surprised these work . I have the apolo 40 grain slugs and they are very loose in the mag and fall right back out if I tilt the pistol up. The apolo 25 and 33 grain pellets however work well.
How many shots do you get with those 25 gr. pellets? Have you used the JSB 33.4 gr. pellets and if so what was the ideal FPS & the difference in shot count?I shoot a lot, so cost is a primary concern. It is nice to know that more energy is available, but I don't need that much to punch paper at 25 meters and cause non-lethal pain to thieves. My GK1 is set up for 700 fps with the 25 gr. pellet. In that light, The JSB 25 gr 25 cal pellet fits my bill well. A tin of these pellets cost the same as the 33.4 gr pellets, but instead of 300 pellets a tin contains 350. My cost then 4.7 Euro cents each.
I'm not sure how to answer that question. Shots per tin is 350. I charge the gun to 300 bar, shoot 17 shots and recharge. After one magazine, I have 210 bar left in the tank. I also use the 33.4 pellets, but only for my Crown at the moment. They are slightly more expensive to shoot in the pistol and for my intended purposes, do not add usable value.How many shots do you get with those 25 gr. pellets? Have you used the JSB 33.4 gr. pellets and if so what was the ideal FPS & the difference in shot count?
Hi Larry,New GK1 V2 .25 cal user issues
Ok - just got the GK1 this week from Ares (shipping issues, delayed a month), and it isn't going well. The GK1 doesn't seem to like the .25 FX Hybrid Slugs (a bit loose), and so I tried some ZAN .253 slugs and they seemed really tight.
The FX .25 went in ok but seemed a tad loose. They didn't fall through the magazine when the pistol was pointed down, but they would fall out easily if I tilted it back. Some of the slugs actually misfired and ended up in the last stage of the Impulse Air 1350 moderator. Never seen that before - glad it's modular and I could just unscrew it and remove them.
I could press the .253 ZANs in, and the magazine turned if I pushed them in so they were flush with the edge of the magazine, but they sometimes misfired as well, and/or left chunks of pellet in the Impulse Impulse Air 1350 moderator. There are really heavy rifling markings on the slugs - which means that the velocity and force is significantly impacted.
Neither of these scenarios can be right.
Are there off-the-shelf PELLETS that I should be using? My .30 cal Alpha Wolf doesn't seem as picky - though I don't plan to try slugs in it, and I'm not really locked into using slugs on the GK1. I HAVE read this entire thread, and thought the ZAN .253 slugs would be ok - though someone also mentioned that they were tight. I'm not wanting to get into anything custom - just something that works off the shelf?
Another question - is the Huben fill probe connection a weird size? I thought all the quick release connections were pretty much universal and were about the same - just some (like for my Alpha Wolf) require a longer one. The Huben fill probe won't connect in the longer quick release connection I use for my Alpha Wolf, but does connect in the shorter one that came with my pump hose.
Sorry for the relative newbie questions -
Larry Becker
Well, I'm embarrassed to say that I didn't do any power adjustments. I wanted to make sure it worked "as is" - and it barely did. I thought that you had to take the handgrip off and "Unlock the potential" of it (per a video from Wolfeik Group's YT channel, but looking again at the video from Ares Airgun Tactical (where I got it), I see that it's a simple adjustment with the hex key. It's been almost a month and a half since I ordered it... shipping drama - I forgot all about that. Anyway, I installed the Speed Loader from Ares, as well as the Impulse Air 1350 moderator - and was worried I was getting some clipping on the moderator. I haven't read about issues with the 1350 and the GK1.Hi Larry,
Welcome to the club : )
Do you have the power turned up (twist the power wheel to the left) when firing the slugs? Out of the box my Huben was turned allll the way down.