Up or down.

To adjust my PCP rifles, I've always followed the methodology discussed and recommended many times on this forum, and honestly, it's worked for me. Since it worked for me, today I was at the club explaining this methodology to a shooter, and together we got the rifle working properly. So far, so good. But another shooter who was listening came over and immediately told me I was completely wrong.

The rifle in question is an FX King .22 with a 600 mm barrel. In my explanations, we start with a regulator at 75 bar, with the macro in position 13.

18 gr JSB pellets, and proceed with 3 group shots at position 13, another 3 group shots at position 14, and continue in this manner until reaching position 23. What I'm looking for is the smallest or closest group at 50 yards. At the 21 macro setting, we achieved near-perfect accuracy. We then used the stopwatch and measured the velocity at setting 21, which was 940 fps; at setting 22, it was 947 fps; and at setting 23, it was 948 fps. It was slightly increased with micro-adjustment, and the velocity did not increase.

From this, I deduce that with the macro in position 21 and making some micro-adjustments, the deviation can be slightly adjusted. In short, I copied my King's settings and applied them to this other shooter's. The differences are that mine, with the same pellet, prefers 937 fps, while this other guy's prefers 941 fps. And from 250 to 100 bar, I got 115 shots.

IMG_1408.jpeg

Well, I'm satisfied, yes, but this other shooter tells me I'm doing it very wrong, that I have a very low regulator and a soft hammer blow, that it's better to raise the regulator to 100/120 bar and have a stronger hammer, that I would get more shots, more consistency, that the regulator would work better, and I would recover faster. Honestly, I don't know if he's right, and I don't want to ruin my setup either, but I have a doubt. He's talking so confidently and he's getting me into trouble. Maybe he was just a conceited charlatan who wanted to brag about what he doesn't know.

Now I ask, which do you prefer? Would both settings work in theory, or which one is the correct one to achieve the desired FPS?

Low regulator and soft hammer.

High regulator and hard hammer.
 
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To adjust my PCP rifles, I've always followed the methodology discussed and recommended many times on this forum, and honestly, it's worked for me. Since it worked for me, today I was at the club explaining this methodology to a shooter, and together we got the rifle working properly. So far, so good. But another shooter who was listening came over and immediately told me I was completely wrong.

The rifle in question is an FX King .22 with a 600 mm barrel. In my explanations, we start with a regulator at 75 bar, with the macro in position 13.

18 gr JSB pellets, and proceed with 3 group shots at position 13, another 3 group shots at position 14, and continue in this manner until reaching position 23. What I'm looking for is the smallest or closest group at 50 yards. At the 21 macro setting, we achieved near-perfect accuracy. We then used the stopwatch and measured the velocity at setting 21, which was 940 fps; at setting 22, it was 947 fps; and at setting 23, it was 948 fps. It was slightly increased with micro-adjustment, and the velocity did not increase.

From this, I deduce that with the macro in position 21 and making some micro-adjustments, the deviation can be slightly adjusted. In short, I copied my King's settings and applied them to this other shooter's. The differences are that mine, with the same pellet, prefers 937 fps, while this other guy's prefers 941 fps. And from 250 to 100 bar, I got 115 shots.

View attachment 577781
Well, I'm satisfied, yes, but this other shooter tells me I'm doing it very wrong, that I have a very low regulator and a soft hammer blow, that it's better to raise the regulator to 100/120 bar and have a stronger hammer, that I would get more shots, more consistency, that the regulator would work better, and I would recover faster. Honestly, I don't know if he's right, and I don't want to ruin my setup either, but I have a doubt. He's talking so confidently and he's getting me into trouble. Maybe he was just a conceited charlatan who wanted to brag about what he doesn't know.

Now I ask, which do you prefer? Would both settings work in theory, or which one is the correct one to achieve the desired FPS?

Low regulator and soft hammer.

High regulator and hard hammer.
I won't even try to justify why it works but I've run across 1 thing with all my PCPs in various calibers (all fac power) 150bar. It just keeps ending up that way. I prefer a heavy hammer and high pressure as it ends up. It's personal preference on the shot event.
 
I've never tried this. Maybe it would make my Caiman a bit quieter. If I understand the "high reg high hammer" you are deliberately going well past the point of highest velocity for the regulator setting to slow the pellet some. I guess I used to do this a little bit on my Avenger after noticing an accuracy improvement. Or are you using a hammer setting much more than 5% under the maximum velocity setting for that regulator setting? I do not own any FX airguns and I am not comfortable I understand the settings discussed.
 
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To adjust my PCP rifles, I've always followed the methodology discussed and recommended many times on this forum, and honestly, it's worked for me. Since it worked for me, today I was at the club explaining this methodology to a shooter, and together we got the rifle working properly. So far, so good. But another shooter who was listening came over and immediately told me I was completely wrong.

The rifle in question is an FX King .22 with a 600 mm barrel. In my explanations, we start with a regulator at 75 bar, with the macro in position 13.

18 gr JSB pellets, and proceed with 3 group shots at position 13, another 3 group shots at position 14, and continue in this manner until reaching position 23. What I'm looking for is the smallest or closest group at 50 yards. At the 21 macro setting, we achieved near-perfect accuracy. We then used the stopwatch and measured the velocity at setting 21, which was 940 fps; at setting 22, it was 947 fps; and at setting 23, it was 948 fps. It was slightly increased with micro-adjustment, and the velocity did not increase.

From this, I deduce that with the macro in position 21 and making some micro-adjustments, the deviation can be slightly adjusted. In short, I copied my King's settings and applied them to this other shooter's. The differences are that mine, with the same pellet, prefers 937 fps, while this other guy's prefers 941 fps. And from 250 to 100 bar, I got 115 shots.

View attachment 577781
Well, I'm satisfied, yes, but this other shooter tells me I'm doing it very wrong, that I have a very low regulator and a soft hammer blow, that it's better to raise the regulator to 100/120 bar and have a stronger hammer, that I would get more shots, more consistency, that the regulator would work better, and I would recover faster. Honestly, I don't know if he's right, and I don't want to ruin my setup either, but I have a doubt. He's talking so confidently and he's getting me into trouble. Maybe he was just a conceited charlatan who wanted to brag about what he doesn't know.

Now I ask, which do you prefer? Would both settings work in theory, or which one is the correct one to achieve the desired FPS?

Low regulator and soft hammer.

High regulator and hard hammer.
HELLO.. if I’m not mistaken your rifle liner 600 is for slugs, let me explain, the twist rate on yours is 1:16, vs, king 500 liner is 1:24.
Which means 1:16 is faster spin for slugs, 1:24 lower spin for pellets. So for the reg setting I recommend you start in 100 for pellets
At #13, for pellets you don’t need a lot of speed i mean you shooting 18 grains , if you decide to use heavier pellet like 25 or higher
Increase you reg 5 bars increment and your macro wheel too, the fine tune with your micro adjustments.

Now Slugs its a little different, they need more speed . I have one king too 600 for slugs and I’m shooting zan 33 grain at 990 .
Just IMHO. BE SAFE
 
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HELLO.. if I’m not mistaken your rifle liner 600 is for slugs, let me explain, the twist rate on yours is 1:16, vs, king 500 liner is 1:24.
Which means 1:16 is faster spin for slugs, 1:24 lower spin for pellets. So for the reg setting I recommend you start in 100 for pellets
At #13, for pellets you don’t need a lot of speed i mean you shooting 18 grains , if you decide to use heavier pellet like 25 or higher
Increase you reg 5 bars increment and your macro wheel too, the fine tune with your micro adjustments.

Now Slugs its a little different, they need more speed . I have one king too 600 for slugs and I’m shooting zan 33 grain at 990 .
Just IMHO. BE SAFE

I only shoot pellets. I don't have any place to shoot, except at the shooting club. The only one where I live has a large gallery that is 50 meters long and is shared with all the shooters.Since it's a short distance for slugs, I'm using the 18g/15.89g JSBs, and I also agree that the King's 600mm barrel is optimized for slugs, but it works very well with heavy pellets.

I'm very satisfied with my current setup; I get very good accuracy and plenty of shots.
The question is about the PCP's settings. I currently have the regulator at 75 bar, the macro at 21, and the micro at 2.3.
That is, I have a low regulator and a loose spring.

Another configuration could be:
a higher regulator and a tighter spring
and the question is, which of the two configurations is better, more advisable?

The point is that if I can get the ideal velocity for the pellet I want with a low regulator and a soft spring, it doesn't make sense to work with a high regulator and a tight spring; this way, the rifle has more stress and more things can go wrong.