AEA VARMINT problem. Got any ideas?

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oregondude

oregondude

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Jul 21, 2021
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Oregon, United States
She drops 9-12fps each shot. 16 shots drops from 1065fps to 880fps. Holds air, uses about 3.4bar per shot which is reasonable. Two chronographs give same results. Bin Tac wouldn't help me even though I bought it from him. He said it was the hammer spring, but when I told him it was new, he said call the shop I bought it from. He didn't listen to what I was explaining and couldn't get off the phone fast enough when he found out I got a $14 part from TPS. Done with Bin Tac. If you have had the same problem I'm having, please chime in.
Thanks, Bill and Addi.
 
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oregondude said:
She drops 9-12fps each shot. 16 shots drops from 1065fps to 880fps. Holds air, uses about 3.4bar per shot which is reasonable. Two chronographs give same results. Bin Tac wouldn't help me even though I bought it from him. He said it was the hammer spring, but when I told him it was new, he said call the shop I bought it from. He didn't listen to what I was explaining and couldn't get off the phone fast enough when he found out I got a $14 part from TPS. Done with Bin Tac. If you have had the same problem I'm having, please chime in.
Thanks, Bill and Addi.
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I'm going to assume that it's not leaking, right? Sounds like a typical shot string for an unregulated PCP rifle that hasn't been tuned. Bin was partly right, you will probably have to adjust the hammer spring tension, as well as the through-port (power dial), pellet weight and fill pressure to get an optimum tune for whatever pellet/slug you decide to use. Do a google search for tuning an unregulated air rifle. There's too much to it for a single forum post or a phone call for that matter. Hope this helps and good luck!
 
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The hammer spring is between the folding buttstock and the frame. There's a castle nut along with a locking nut. You need to loosen the locking nut so that you can back off the castle nut a little bit and then retighten the locking nut and that will decrease the power of your gun. It's a tedious process but an easy one. I've adjusted the .25 hades to go 1030 across 30 shots with a huge spread to 870 across 90 shots with a relatively small curve. Also dialing in the transpott port ofcourse.
 
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oregondude said:
Ya, like I said, it holds air. I'm looking for someone who has had this problem with the Varmint.
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It's not a "problem", it's normal behavior for an unregulated PCP that hasn't been tuned. You need to either tune it yourself or find someone to tune it for you. Or, as someone else suggested, add a regulator, that will also need to be tuned. Unlike a powderburner, PCP air rifles need a fair bit of work to perform optimally. Sometimes you get lucky and get one that works exactly how you want it right out of the box. But that's not always the case. Good luck.
 
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Stretch said:
It's not a "problem", it's normal behavior for an unregulated PCP that hasn't been tuned. You need to either tune it yourself or find someone to tune it for you. Or, as someone else suggested, add a regulator, that will also need to be tuned. Unlike a powderburner, PCP air rifles need a fair bit of work to perform optimally. Sometimes you get lucky and get one that works exactly how you want it right out of the box. But that's not always the case. Good luck.
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I have 4 unregulated guns. Daystate Huntsman Revere Safari, Evanix AR6K, AEA carbine and the Varmint. I have a couple of regulated guns including a Panthera Hunter 22cal. My Varmint I've had for over a year and it has been great. 22gr Impulse slugs at 985fps lazer accurate. 36 shots with an extreme speed of 27fps. I get that in first 3 sgots now. Tested 2 spring of different weight, used stock adapter to back off pre-load, played with the tp down to 730fps. Pulled the valve and valve pin, there good. The new spring is from the Pellet Shop and started at 63fpe, 12 shots later it was 54fpe. Holds air, using 41.6psi per shot, 2.9 bar. Very acceptable. No this is not normal. So says Lewis the AEA tech and Bin from The Pellet Shop who both own them. I know my gun and it is misbehaving .
This gun is capable of 60fpe with amazing accuracy. It is absolutely not normal to shoot down every shot 9 to 12 fps. I'm not seeing unusual air consumption as I have pointed out. Tomorrow I will give it 5min between shots to see if the plenum pressures up and she levels off. Bill and Addi
 
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sb327 said:
What caliber and projectile/weight? My .22 varmint didn’t act that way out of the box.

Dave
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Had mine for over a year, and no it never acted this way. I don't know what you're shooting, but Impulse slugs at 985fps are unreal. Check my old posts for target pictures. I did one comparing Zan to Impulse. I think you'll like. Let me know.
Bill and Addi.
 
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stanginthe11s said:
to cover basics, have you disassembled the gun, cleaned and lube? possible the hammer is dragging on the rod. have you noticed a slight increase in speed? maybe the valve spring has weakened causing the valve to stay open longer.
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Like I said, air consumption is normal. If it were hammer drag it would result it slower velocity, not progressively drop .
 
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I'm sorry I don't understand what you're trying to figure out. just trying to help. all air guns have the same problem, they use air. the hammer in these guns is not free floating so no, hammer drag might not cause slower velocity as it could be sticking by the valve. pellet speed drops on every shot when a gun is not regulated and not tuned. these guns are set to run maxed out so if you want to get a better shot string then you will have to look at the hammer, hammer spring, valve and valve spring. all of those things will have an effect on the shot. now, you may think the air consumption is good but the fact that your speeds are dropping more than usual after a shot indicates that you are wasting air. a similar thing happened to me and shortly after, the valve broke. yes, you said the valve is good, but it could be on its way out. since you tried the hammer spring already the only things left are the hammer, valve and valve spring. you stated the gun was not doing this until recently, so if you made no changes to it then I would look at all Orings and change the valve and spring.
 
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Hmm, that’s odd. Having been fine but now it’s not.

Is it possible the stem has been driven into the poppet? Without having another handy it might be hard to tell, the bolt would be engaging the hammer sooner than it used to.

If the stem is effectively shorter, the hammer may be bottoming out on the cocking lug of the bolt and creating the same lift for high and low pressure. This would explain the constant drop.

Just something to consider.

Dave

ETA, just remembered cocking lug rotates out of the way
 
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sb327 said:
Hmm, that’s odd. Having been fine but now it’s not.

Is it possible the stem has been driven into the poppet? Without having another handy it might be hard to tell, the bolt would be engaging the hammer sooner than it used to.

If the stem is effectively shorter, the hammer may be bottoming out on the cocking lug of the bolt and creating the same lift for high and low pressure. This would explain the constant drop.

Just something to consider.

Dave

ETA, just remembered cocking lug rotates out of the way
Click to expand...
Thanks Dave. I have a spare valve pin, so I'll take look. Be nice if I get it back to proper function. I'll let you know what I find. Cheers, Bill and Addi.
 
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