Help! Brand new AA S510 problems.

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ElmerFuj

Member
Sep 17, 2015
81
2
California
I just picked up a new S510 carbine and have only put ~200 pellets through it but have found a troubling issue; on low power every few shots in landing ~1" high at 20 yards. The gun effectively is making 2 nice groupings 1 inch apart. I don't have a chrony yet, but I suspect it's shooting higher fps during the anomalies.
Has anyone heard of this type of issue before? I'm shooting JSB 18.13gr pellets and the shop owner said on low it's firing them at 396fps. The power adjuster knob is not moving, I checked the rings, and the scope is brand new. Any suggestions? I hope I won't have to bring back the rifle to get fixed under warranty- the reason I decided to pay for this rifle was I expected at this price it should be perfect out of the box. I'm rather disappointed right now...
 
Unfortunately paying more does not prevent issues. I actually have more issues with my expensive guns than my cheaper ones for some reason. 

You would need to get a chronograph to see for sure what is happening but I think it might simply be a case of it not putting out enough energy to stabalize the 18gr pellet on the low power setting. if they are not traveling fast enough to be stable or if they travel too fast, you get spiraling which would result in some pellets hitting lower than the rest.

Also, that gun is not regulated so you have a power curve - I.e. You would expect power to drop a little from the first shot until it reaches the bottom of the bell curve and then it starts to rise again. 

I honestly have no idea what happens to the curves if the gun is set to low power like that because I can't recall ever reading about someone actually using it with the expectation of accuracy. 
 
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Zebra- I guess the saying "more money, more problems" might be true for air rifles haha. Im fairly certain it's not a mere bell curve issue since it's throwing them high at random intervals throughout a 40 shot string. I thought about stability, but the shots dont appear to be key holing on the paper. I'm bummed to hear that the low power might not be accurate, especially since my 1322 is shooting at approximately the same speed and typically manages 1/3" groups at the same distance. I'll try out my friends chrony soon to help see what's going on.

dirte- I'll definitely try out cleaning the barrel, hopefully it'll be an easy fix. I tried some cheap crosman 14gr pellets (which I assume would be a little higher fps, and the POI appears to confirm this), but they had the same issue. I was hoping I could get away with decent plinking accuracy at the low power, that way I can just go max low for home, and max high for hunting/range (that way the dial would always be at the same spot). I had the shop owner stiffen up the knob, and I've been checking it every few shots (doesnt seem to move at all).

I'll try out your suggestions and hopefully get to the bottom of this problem. Thanks.
 
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I dont think I ever used mine on the lowest setting prior to regulating it. I did use half power and it was accurate. I have it regulated to 15.5 fpe now and its a tack driver. Try it on the middle and see if it improves. The AA power wheel just closes or opens the transfer port so it doesnt physically change anything in the valve, hammer or hammer spring. If the problem is only there at extremely low power I would guess it is a stability issue.
 
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Ginuwine- unfortunately my model doesnt have the hash marks on the other side (I wanted the one with hash marks, but none were available), which makes it difficult to find repeatable positions between max low/high. I'll try your suggestion though and see if I can get it to group w the knob around that position.

LDP- I havent tried any other settings for groupings (since it's a little too loud for neighbors), so I'm not sure if this problem will occur at higher settings. I knew how the knob works, which is why I assumed the low setting would give me the flatest curve; but I could easily be wrong. Also figured if stability were the issue I would be keyholing and wouldnt be getting 1/2" groups with the flyers making consistent groups 1" high. Quick questions about your reg- which one do you have, is it quieter (comparing at the same fpe), and do you get good groups at max high and low settings?

Thanks guys. I'll keep you posted.
 
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Why not order an LDC / shroud extension to make it quieter if that is the issue?

I always thought the S510 was a fairly quiet gun unless you live in Canada where they remove any baffles. I'm surprised it is too loud for the neighbors unless you live in Canada or have unreasonable neighbors. 

I think that dealing with the noise would be easier that making it accurate without enough power. If the airplane won't fit through the garage door because it's wings are too wide, you are better off widening the garage door than trying to figure out how to make it fly without wings. 


Do you you like my analogy? If it wasn't clear... My suggestion is to buy and LDC and turn the power wheel up until it is optimal for the pellets you are using.

Also, be mindful of the wind. Firing into a head-wind causes eratic POI shifts like you describe and the effects would be exaggerated at lower speeds. 

 
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Zebra- I'm planning on getting an LDC from Neil Clague soon- I have one of his LDCs on my S200 and it works very well. I just dropped a lot of cash, so itll have to wait though. The main reason I wanted to shoot at max low was to ensure that I could consistently get back to the same power. I'm thinking you guys are right- I just need to crank up the power, but I'll find out in the next time I shoot.

I like that saying, I'll have to remember it.
 
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I have the huma reg. I dont use the power wheel since regulating it but its regulated to 15 fpe with 16 gr JSB so its shooting @ 660 fps. I did have it regulated to 28 fpe when I first regulated it. Once the hammer and valve were balanced for the lower pressure of the reg it was quieter but not a huge amount at 28 fpe. I made a moderator for mine and regulated to 15 fpe it is extremely quiet and the only noise you here is the hammer striking the valve and the smack of the pellet. 
 
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