N/A .177 for slugs (primarily at least)?!

Hmm…did you see that video ? It is old. Maybe the older RW with older electronics has something to do with it ?
No I have not. But yeah could be, not sure when they switched them over to the ART barrel but out of those I never found a slug that worked. Have to admit that I didn’t try too hard though given how good they shoot with pellets and what alternatives are there for slugs.
 
Jace when my gun gets back it better shoot that good or better!! Dang fx!
In terms of spread it better be better than this although it's not like the spread is eratic throughout the whole shot string. But 17fps spread was the best I could out of working in the day light.

Airgun High Power

JSB KO .177 13.43 gr

Shot count: 15
Low: 932
Hi: 949
Avg: 942
STD Dev: 5
Spread: 17

2/11/25 5:39:10 PM,946,FPS,26.7,FT Lbs,
2/11/25 5:39:22 PM,939,FPS,26.3,FT Lbs,
2/11/25 5:39:27 PM,939,FPS,26.3,FT Lbs,
2/11/25 5:39:33 PM,946,FPS,26.7,FT Lbs,
2/11/25 5:39:40 PM,946,FPS,26.7,FT Lbs,
2/11/25 5:39:47 PM,949,FPS,26.9,FT Lbs,
2/11/25 5:39:59 PM,944,FPS,26.6,FT Lbs,
2/11/25 5:40:05 PM,946,FPS,26.7,FT Lbs,
2/11/25 5:40:11 PM,939,FPS,26.3,FT Lbs,
2/11/25 5:40:18 PM,946,FPS,26.7,FT Lbs,
2/11/25 5:40:26 PM,944,FPS,26.6,FT Lbs,
2/11/25 5:40:35 PM,932,FPS,25.9,FT Lbs,
2/11/25 5:40:41 PM,937,FPS,26.2,FT Lbs,
2/11/25 5:40:47 PM,937,FPS,26.2,FT Lbs,
2/11/25 5:40:5

2 PM,937,FPS,26.2,FT Lbs,


Airgun High Power

JSB KO .177 13.43 gr

Shot count: 13
Low: 728
Hi: 768
Avg: 751
STD Dev: 12
Spread: 40

2/11/25 5:27:50 PM,765,FPS,17.5,FT Lbs,
2/11/25 5:28:05 PM,768,FPS,17.6,FT Lbs,
2/11/25 5:28:22 PM,768,FPS,17.6,FT Lbs,
2/11/25 5:28:31 PM,747,FPS,16.6,FT Lbs,
2/11/25 5:28:46 PM,761,FPS,17.3,FT Lbs,
2/11/25 5:28:58 PM,747,FPS,16.6,FT Lbs,
2/11/25 5:29:15 PM,742,FPS,16.4,FT Lbs,
2/11/25 5:29:22 PM,745,FPS,16.5,FT Lbs,
2/11/25 5:29:33 PM,747,FPS,16.6,FT Lbs,
2/11/25 5:29:44 PM,747,FPS,16.6,FT Lbs,
2/11/25 5:29:52 PM,728,FPS,15.8,FT Lbs,
2/11/25 5:30:05 PM,738,FPS,16.2,FT Lbs,
2/11/25 5:30:12 PM,759,FPS,17.2,FT Lbs,

Screenshot_20250211_172528_FX Radar.jpg
 
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You need some 10gr mk iii? Seems like I have a couple of tins but they are too loud passing obstacles at a reg setting good for the 16gr and I prefer the 16gr :)
If you're talking to me, I have like 4 tins lol.

Also I am finally at 200b form 300b and I'm 173 shots into it lol.
 
Ok ok, getting there I guess, played with the hammer adjuster and backed it waaaay out. Had to carve the bolster or whatever it is inside the stock to fit back in there with the hammer adjuster far out. Strings getting tighter and tighter though and I finally managed to get the chrony to read the H&N 98% of the time.

@JaceSpace1369 when you say “adjust the valve”, do you mean playing with this screw (for which I assume that the valve is behind) - see pic?

Lastly, NSA 15gr .178 arrived. They are veeery tight, a lot of resistance when loading and the go 890fps, so 30 slower than the H&N even though the NSA are 1st lighter… gotta try different lubes and see what happens. Otherwise I’ll have to up the reg I guess and say bye bye for sure to the 10gr mk iii…

IMG_5421.png


IMG_5420.png


IMG_5418.jpeg
 
Ok ok, getting there I guess, played with the hammer adjuster and backed it waaaay out. Had to carve the bolster or whatever it is inside the stock to fit back in there with the hammer adjuster far out. Strings getting tighter and tighter though and I finally managed to get the chrony to read the H&N 98% of the time.

@JaceSpace1369 when you say “adjust the valve”, do you mean playing with this screw (for which I assume that the valve is behind) - see pic?

Lastly, NSA 15gr .178 arrived. They are veeery tight, a lot of resistance when loading and the go 890fps, so 30 slower than the H&N even though the NSA are 1st lighter… gotta try different lubes and see what happens. Otherwise I’ll have to up the reg I guess and say bye bye for sure to the 10gr mk iii…

View attachment 538575

View attachment 538576

View attachment 538577
It's the screw underneath the plenum. Based on the picture you sent that doesn't look right though. It looks like the base of the plenum is interfering with adjusting the valve which was not the case for my U2 700mm.

Damn you had to carve the back out?

Those spreads are tight!
 
It's the screw underneath the plenum. Based on the picture you sent that doesn't look right though. It looks like the base of the plenum is interfering with adjusting the valve which was not the case for my U2 700mm.

Damn you had to carve the back out?

Those spreads are tight!
Yeah the plenum would be in the way if I would want to adjust the 5mm out beyond flush! But I guess adjusting it in puts more spring on the valve and if anything I want it to close faster?! Pretty sure it’s still waisting air…

Definitely had to carve the weird stuff in the back of the stock! Hammer adjuster is more than halfway out now :)
 
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Yeah the plenum would be in the way if I would want to adjust the 5mm out beyond flush! But I guess adjusting it in puts more spring on the valve and if anything I want it to close faster?! Pretty sure it’s still waisting air…

Definitely had to carve the weird stuff in the back of the stock! Hammer adjuster is more than halfway out now :)
That's really strange as my U2 700 valve adjuster was not blocked in the slightest 🤔. I believe screwing it in leaves it open for longer, as I had to unscrew mine 3/4 of a turn to tighten up the spread on my U2 700.

Damn, that sounds like a lot of material to carve out.

I'm really wondering how you'd go about adjusting that valve if it's in your way. I wish I would've taken a picture of mine when tuning it before I shipped it out.
 
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That's really strange as my U2 700 valve adjuster was not blocked in the slightest 🤔. I believe screwing it in leaves it open for longer, as I had to unscrew mine 3/4 of a turn to tighten up the spread on my U2 700.

Damn, that sounds like a lot of material to carve out.

I'm really wondering how you'd go about adjusting that valve if it's in your way. I wish I would've taken a picture of mine when tuning it before I shipped it out.
Damn. If going out closes faster than I really have to figure… will check tomorrow and see how far I can go out (and what happens).
 
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