Accuracy problems. What do I do?

kyler I have read lately you have been having some problems with your FX Verminator. If it is not something simple to fix yourself why not send it to AOA and have them fix the problem. I cannot see anything major being wrong with the rifle. How long have you had it and is it still under warranty. Good Luck Bill

The more details you can provide about what you are doing and your set up the easier it will be to help you. How much pressure is in the gun? Is it to low? Could it have a leak so that when you take it out to shoot it is low? Have you ruled out a defective scope? Have you cleaned the barrel recently?

What 30cal said !! Have you cleaned your barrel ? Crap build up in the barrel can have a major affect when it comes to accuracy.
I clean my Wildcat after every outing.

The first thing I would try and rule out is the scope. Have you tried a different one? I have had scopes that needed re-zeroing every time I shot. It wasn't as drastic as your example but still possible.

I spent an afternoon trying to zero the scope on a Savage .22LR that had me baffled. It would be dead-on for one magazine, then I'd load the next one and it would be WAY off. I chased my tail for about 200 rounds. I finally decided to call it for the day and I tipped the rifle to put the gun in the case and the scope slid off the rails. It was strange because it was tight if I tried to wiggle it side-to-side but if I pulled back on it it slid freely. I have no idea how that happened. At any rate, after I tightened everything it was better.

First we take a risk at buying a newly release Airgun to market, secondly both FX airgun have been reportedly have small issues with multiple owners. With that said I hope that all the issues are resolved in a timely manor, none of which helps you, it should just be consider food for thought. Pellets are not clipping so that is good. To check leaks are EASY, fill up the tank before bed write the number down and check it in 12 hours. POI shift is different, I would first do 10 shot groups at 25 yards and see how it groups (30 shots). Fill it up and do it again and see if there are any POI shifts at 25. I would make sure that your scope is tight but not overly tight which could damage the lens and play havoc on your shooting. Shooting from a dead rest doesn't mean you are going to have .5 inch groups if all your technic (hold, breathing, cheekweld, and trigger control) are not good. I believe you mentioned you are shooting JSB 16 or 18's both are fine for these testing, and the only reason i say that is Most guns shot them well, not all guns but most. You may have one that prefers H&N's. If you can get .5" groups at 25 yards all 6 shot groups then move back out to 50 yards. Baby steps work for me in narrowing down problems. and now you think you have a leak, and second point of impact is changing. Please post a target group next time if you can, and have you Crony a shot string yet? If not you really should see what your gun is shooting at if you are blasting away over 1000 FPS that could be your problem, or below 800.

Why do you only fill to 150 bar? I fill my wildcat to 230 bar down to 150 bar. Then refill again

Kyler from the specs. I have seen on the Verminator the fill on that rifle is 220 bar. I have seen some shot strings where they fill as high as 250 bar and shoot down only to 150 bar to 100 bar. I would fill to 220 bar or what your manual says and start shooting over a chronograph and see your velocities. It could be that you are starting of with the rifle charged too low and it is falling off the regulator. That would throw off the accuracy at further distances like 50 yards and more. From a full fill (220 bar) from what I have read you should get over 100 shots per fill. When I get a rifle for the first time I always run it over the chronograph to see its shot string before its fps drop. Bill

One of the best tools to diagnose airgun problems is a chronograph. You don't seem to be filling your gun with enough air. You need to do a full fill and shoot over a chrono to establish a good shot string, the area where your gun shoots the most consistent. Is your vermi regulated? You will probably find you will get your best shots between 220 and 150 bar. Also how is your breach oring? If you are getting blowback that will affect accuracy and velocity

Sounds like your gauge is bad if that is the case you could be shooting with very little air pressure which is not good for the valve.

Do you have 2 gauges on your tank? What is your tank reading when your gun shows 150 bar

Kyler what does your 4500 psi fill tank gauge read when filling your air rifle. That is the more accurate gauge to go by. The rifles gauge is usually used to give you a general idea of when to fill your rifle. If your fill tanks gauge reads say 200 bar and your air rifles gauge only reads 150 bar the gauge is bad or something else is wrong. If that is the case send your rifle back to AOA to be gone over. I should say as AZBOBCAT mentioned some tanks like mine a 'Great White' has two gauges one showing tank pressure and one output pressure to my rifle. Do you have a picture of your tank set-up.

A lot of these so called 4500psi compressors can only fill to 4200psi unless they have a few tanks hooked up to it and cascade the air when filling. I go to a paintball shop and the owner is the only one who knows how to completely fill my tank to 4500. All of his employees where only able to reach 4200.

Kyler here is my tank set-up with the smaller gauge showing the fill tank existing pressure. The larger gauge will register what is going into my rifles on board tank. 
Gauge

Gauge shown here on the tank shows level of pressure going into the rifle

Kyler I just watched the AOA youtube video on your omega 75 cu/ft tank. It appears you have the tank with the one gauge that only registers the out going pressure to your rifle. Since you said both the tanks gauge and rifles gauge both read the same pressure it appear its time to get your Omega tank filled again. I see that AOA does have an upgraded valve that shows both tank pressure and outgoing pressure like mine. However there is a fitting called a deadhead I believe that you install in the tank or hose end to plug it up so you can open you tank valve and get the fill tanks pressure. That would be a cheap way to monitor your fill tanks existing pressure. Maybe someone can chime in about the deadhead fitting and how to use it and where to buy one. At this point it appears you are just running out of high pressure air and that may be the cause of your accuracy problems. You can then use the dead head to confirm your tanks fill pressure after the scuba shop finishes filling it. Than also like others and I mentioned get a chronograph if you don't have one to check your rifle performance. Then you can use the data to create drop charts and other things. Bill

Kyler I found the dead head fitting on airtanksforsale website. the fitting is about 3/4 down the main page with some other fitting. Call Joe B. and he will send you one out right away I bet.

http://www.airtanksforsale.com/