umarex gauntlet .25 and slugs

Jmo slugs work best if your gun is shooting normal pellets at least 1000 fps. Ive only tested this on one gun the airforce condor. Your results may vary. Maybe try the new fx hybrid slugs when they come out? 

Tried .25 slugs on the stock gauntlet you not enough power to push the slug accurately

H&N 0.25 slugs were horrible until I put Haji's baffle kit in, and now they are reasonable but not as good as the JSB kimgs. I haven't tried the H&Ns past 50 yet, but at 50 they were about an inch. Kings are 0.25-0.75 inch at 50 yds. FWIW, I put Haji's baffle, stripper, and recommended hole in the shroud all at the same time, which didn't make a noticeable difference in loudness.

I'm pretty sure the Gauntlet barrel is choked. It's designed for pellets, and all mass produced PCP pellet rifles use choked barrels. But if you want to be sure, then slug your barrel. Take a pellet and push it into the breach end of your barrel. Then take a cleaning rod and manually push it through. At first you will have resistance. Then as the pellet conforms to the shape of the barrel, you will feel the resistance ease up. If the barrel is choked, you will feel the resistance on the pellet increase in the last 1.5 to 2" of the barrel. But I'm 99% sure the barrel in question is choked.

But the gun is also limited by the regulator. It's a Ninja reg with a preset reg setting. It's set for pellets, and the plenum is too small to send slugs downrange with decent velocities and stability. Ninja makes high pressure regs that can handle 4500 psi on the bottle side and have a set regulated pressure of 2800-3000psi. Not sure if it's compatible with the existing config on the Gauntlet, but if it is, that would be an upgrade that could potentially allow for slugs. But then you have your next hurdle.... If you upgrade the reg, can the o-rings in the vale assembly handle the higher pressures? And can the hammer spring generate enough power to break the seal on the valve assembly with the higher pressure of the regulator behind it?

Greetings,

New to the forum. I’ve tried NSA slugs in some limited light weights in a stock .25 gauntlet hoping velocities would be higher and result in improved performance. I tried 26.8, 29.0 & 29.5 weights.


All these slugs required extreme effort to cam the bolt closed in comparison to pellets. I actually lightly lubed the slugs using lee case lube as I believe it to be non petroleum based. Lubing helped at lot and got the 26.8 grn slugs to load with only limited effort above normal when loading from individual shot tray.


The accuracy of these were not good. The 29.5 gave the best group with 3 grouping at about 1” and 2 flyers out to about 3”. These were shot at 50 yards.


My base line control group is JSB 25.39 - one ragged hole with all eight touching (1.08 MOA) 

Choro Data:

26.8 - avg 873 FPS - STD of 2.9

29.0 - avg 848 FPS - STD of 5.0

29.5 - avg 848 - STD of 10.7

control-group 25.39 JSB

25.39 - avg 909 - STD 1.8

Has anyone found a .25 slug that will shoot 1 to 1.5 MOA out of the Gauntlet?

Thanks for any feedback