AEA Possible problem with a Megalodon

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Panzerfaust said:
What’s up air gun experts? I recently purchased an AEA Megalodon, I have enjoyed the rifle very much. I had no plans to do anything with it but use it as a long distance hole punch. After shooting it a lot I discovered it produces ample power to use it for deer hunting. Even without a moderator and even being a 50 cal the reduced noise when shooting the rifle makes it appealing to me over a powder burner for hunting and possibly even home defense. You wouldn’t go instantly deaf if you had to discharge it inside and so far it holds its air charge reliably. If I fill the tanks on my Megalodon to the max which is 4500 psi, consistently the first time I shoot it produces something like a half power shot. The slug or pellet will hit 6 to 8 inches low and you can just tell by the noise from discharging as well as the sound of the slug impacting being less tells me it’s around half the power it normally produces. My guess currently is the hammer is not striking the valve hard enough to overcome the air pressure enough to allow enough air to produce a full power shot. Assuming that is not incorrect what could be done? As far as I know there is no way to adjust the hammer spring, I would check the manual but it is an AEA product and they apparently don’t want to waste any paper or ink on anything like an instruction manual. Nothing like buying something you know very little about in general , then it arrives and you think they forgot to include the manual, then you start looking and find out they just don’t even bother with any manual. That fact may have caused me to choose a different brand for my first pcp. I didn’t know though and now I own it so I’ve had to ask a lot of questions to get going with it. This is the reason I referred to everyone as air gun experts at the start of this thread. I have found the answer to all my questions so far here on this site. I appreciate all the info so far and would also appreciate any info anyone might be able to share concerning the half power first shot from maxed out air tanks. If I stop filling the rifle at 4100 to 4200 psi I then get a full power shot without fail, so that is what I have been doing. I guess my question is do I need to even worry about it or just stick to 4200 psi ? I’m concerned the issue may become worse over time and I will regret not trying to deal with it now while there is a warranty, assuming they honor it of course. Thanks for reading all that if you made it to the end. Thanks in advance for any advice also.

Jim

p.s.- I’m not filling it inside and then taking it outside where the temp increases causing the air pressure to rise and exceed 4500 psi, I was warned about that happening before I filled it the first time. Just in case someone thinks that might be what’s causing the issue.
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I have the solution to your problem I went through the same problem and figured out the issue...the problem is the bolt screw that sticks out to be able to de cock the rifle rubs on the half moon track when is charged to 4500 psi..is annoying but I took an Allen wrench to it and took it off and just have it in my rifle case if i have to decock the rifle manually I'll screw it quick decock it then take it off but that is the solution the bolt handle rubs on the frame and it does not let the hammer strike completely. Now i get full power shots at 4500 psi I put it through my chronograph and im getting 930 fps with the 230 gr texoma slugs
 
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DonEnzone said:
I had a similar issue with my T9. There is a small rod screwed into the bottom of the bolt, which is what cocks the hammer. If that rod is screwed out too far it will rub against the top of the hammer. You can clearly feel more drag/resistence. AEA and BinTac really need to invest in some proper loctite glue. Pretty much every screw in my bolt assembly came loose because of recoil. Including the bolt handle.

I think this explains why the gun becomes a little weaker. The resistance slows down the hammer and it'll hit the valve pin with less force.
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I'll keep this in mind i just bought the t9 as a Christmas present to my self.
 
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pcponly said:
I have the solution to your problem I went through the same problem and figured out the issue...the problem is the bolt screw that sticks out to be able to de cock the rifle rubs on the half moon track when is charged to 4500 psi..is annoying but I took an Allen wrench to it and took it off and just have it in my rifle case if i have to decock the rifle manually I'll screw it quick decock it then take it off but that is the solution the bolt handle rubs on the frame and it does not let the hammer strike completely. Now i get full power shots at 4500 psi I put it through my chronograph and im getting 930 fps with the 230 gr texoma slugs
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Well how much QC can one expect for an almost $1,000 airgun?
Kidding kidding, everyone knows the answer is more/better.

John
 
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30clipslinger said:
Not bad at all! Still trying to decide between 357 or 457. This will probably be next on my list.
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That decision should be based on what use you want for the gun...I got the .510 but I was looking for stopping power and 900 plus fps speeds with 230 gr slug...cons ammo more expensive as you go up in caliber and less shots per fill.
 
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pcponly said:
That decision should be based on what use you want for the gun...I got the .510 but I was looking for stopping power and 900 plus fps speeds with 230 gr slug...cons ammo more expensive as you go up in caliber and less shots per fill.
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Honestly I am looking for something a bit versatile. Something I can hunt medium game with, something I can get a decent amount of shots with as well to plink with.if I could get 457 stopping power with the shots per fill as a 357 I would be really happy lol. Might have to check on the difference in fpe between the two but rn it is looking like the 357 may be the one for me
 
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30clipslinger said:
Not bad at all! Still trying to decide between 357 or 457. This will probably be next on my list.
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I wanted a 357 but they didnt produce any in the first few batches they released so I ordered a 457 because I didn’t want to wait. The airgun shop screwed up and shipped me a 50 caliber. This was the first pcp airgun I purchased , so once I got my hands on the 50 cal there was no way I was boxing it back up and sending it back to wait on another one that used a slightly smaller slug, lol. Once I discovered .495 Hornady swagged round lead ball ammo I was glad I kept the fifty caliber. Good round balls are hard to find but the true round ones fly superbly from my megalodon, accurate enough to use as its exclusive ammo if desired. I do have the long barrel version , that could improved round ball performance, I’m not sure. Check out Toxic Matrix on YouTube if you have not already, he has a couple of videos showcasing a 457 meg, he is a good shot anyway but he makes it look easy with that 457. After having this 50 with hind sight and all , I think the 457 might be the best option between those 2 calibers. I can get 16 good and lethal shots from my Meg , 2 full mags and I still have 2500 psi so I could get a few more. I do have the 22 inch barrel version and it has 100 cc more air storage than the 15 inch barrel versions. 22” 600 cc 15” 500cc. That’s going to be even better with 457 and my favorite thing about my Megalodon is I can bust up cinder blocks with all those ftlbs of energy it makes if I want too. The 357 will lose some of that and possibly gain some distance in trade and a few more shots. If you want to do a lot of shooting in a range type set up you will probably want to think about a carbon fiber tank. I got a 4.6 liter tank , a Scott brand 30 minute fireman’s tank from ebay for 40 bucks , works perfectly. If you don’t already got that worked out I mean. You will like the Meg at either caliber I feel certain , the brightest side is I don’t think there is a wrong choice. I would imagine the 457 is the most demonstrated caliber megalodon on YouTube , I don’t think I’ve seen many negative reactions to them other than the thing with the decocking part of the hammer which sux if it’s an issue but is simple to correct and takes 15 minutes. Mine rubs but so far hasn’t caused any valve lock issues to cause me to adjust it at all. I would be interested in learning what you choose and you thoughts on it after you have tried it out thoroughly.
 
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