I recently bought an Fx impact m4. It seems to be shooting inconsistently on a double stand setup (no I wasn’t holding it) when I was zeroing it. Would anyone know the reason?
Inconsistent groupings on Fx M4
- Thread starter Johnsmith120
- Start date
probably your gun needs some tuning to fit it to the pellets you like to use. What are you shooting, at what speed and what are your settings (regulator, macro en micro wheel, valve adjuster)?
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agree with the above.
i think it could be.....any or all.
1. pellets going too fast.
2. too much hammer for current regulator setting causing widely fluctuating pellet speeds.
3. your pellets.
too many times ive seen someone buy an fx and run the cheapest pellets they can find through it (crossman) and then blame the gun for not shooting at its best,
run some flavor of JSB,JTS,or H&N pellets if you want accuracy and consistency.
4. check the barrel liner and moderator for any obstructions or imperfections.
5. clean the barrel liner. alot of people forget this step cause they cant wait to get shooting,
maybe just some crud causing poor groups.
also,
seeing this was your first post,
how much experience do you have with pcp's?
too many unanswered questions lol
i think it could be.....any or all.
1. pellets going too fast.
2. too much hammer for current regulator setting causing widely fluctuating pellet speeds.
3. your pellets.
too many times ive seen someone buy an fx and run the cheapest pellets they can find through it (crossman) and then blame the gun for not shooting at its best,
run some flavor of JSB,JTS,or H&N pellets if you want accuracy and consistency.
4. check the barrel liner and moderator for any obstructions or imperfections.
5. clean the barrel liner. alot of people forget this step cause they cant wait to get shooting,
maybe just some crud causing poor groups.
also,
seeing this was your first post,
how much experience do you have with pcp's?
too many unanswered questions lol
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We ALL have to find the pellet each gun prefers. How many have you tried & what type? The problem MIGHT be as simple as that. Did you clean barrel thoroughly before starting to shoot? Just having an expensive & accurate gun is no guarantee it'll shoot all projectiles well. Also, when asking for help, the more info given by you, the more it helps to get relevant answers! What caliber, distance zeroing in, projectile, etc. RELEVANT INFO YEILDS RELEVANT ASSISTANCE
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Agree with clean barrel suggestions. PatchWorm and Ballistol are popular, Steve, at AEAC, has great how-to video on YouTube. Can always tell when barrels need cleaning, as accuracy suffers, run a few patches thru, back in business. Also, M4 likely tuned to JSB pellets, try them. WM
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I disagree, there is plenty of evidence, he stated "FX". There is the problem right there.
starlingassn pretty much covered it, as our new friend barrels down the Rabbit Hole® he will acquire the necessary equipment and experience that we all have gone through. Measure it, adjust it, shoot it.
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I know you're new to the forum but are you new to airguns? Your problem can be many, many things. The gun you chose can be absolutely overwhelming for a "newb" with no prior experience. This thread is like to calling an auto mechanic & saying "my car won't work. What's wrong with it?" Get the idea?
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More information required as others have mentioned.
Never assume any air gun arrives brand new and at an optimal tune. They leave the factory with a cursory function test and leave the dealerships with not much else unless you request and pay for a "tune".
The issue you are describing can be caused by a lot of things. Dirty barrel, pellet clipping in the moderator, wrong pellets, too much hammer, grub screw that holds the barrel is loose, scope not mounted correctly and I could go on with more but you get the idea.
Maybe if you shared your reg pressure and the setting of your micro wheel we could start from there.
Folks here are good at helping and generously share their knowledge, but they need some specific information to start.
Never assume any air gun arrives brand new and at an optimal tune. They leave the factory with a cursory function test and leave the dealerships with not much else unless you request and pay for a "tune".
The issue you are describing can be caused by a lot of things. Dirty barrel, pellet clipping in the moderator, wrong pellets, too much hammer, grub screw that holds the barrel is loose, scope not mounted correctly and I could go on with more but you get the idea.
Maybe if you shared your reg pressure and the setting of your micro wheel we could start from there.
Folks here are good at helping and generously share their knowledge, but they need some specific information to start.
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Johnsmith120 I feel your pain. I also have an M4 that is inconsistent. Here are my settings;
FX M4 Impact, 30 cal, 700mm, Vortex crossfire II 6x18-44 scope
45yds range
Reg: 130bar
Macro: 16
Micro 5
Front Valve: 4+1/2 turn
Pellets 30 cal 44.5 gr FX Hybrids
Recently (200 shots ago) replaced my stock 1:40 liner for a 1:16 STX superior heavy liner.
The 1:16 shoots slugs better than the 1:40. But 44.8gr Hades shoot better out of 1:40 as you might expect.
Today, using the heavy liner I was getting .60-.70 groups of 5 shots at 45yds. Then next shot is 1 1/2" north?!?!?? Next shot is low left by an inch?!?!? Then three next three are high an inch, but stacked on top each other.
Well maybe the scope is loose. Nope, checked it. Barrel liner loose, Nope checked it.
I bought the to kill pests humanely. It's not very humane if my vital organ shot hits a leg.
Not happy with my purchase right not.
Yes I cleaned the new STX barrel liner.
I'm getting the same issue with H&N 50gr.
If it were $10 wrench, i would have thrown it. But I did the responsible thing and just put it away for the day.
FX M4 Impact, 30 cal, 700mm, Vortex crossfire II 6x18-44 scope
45yds range
Reg: 130bar
Macro: 16
Micro 5
Front Valve: 4+1/2 turn
Pellets 30 cal 44.5 gr FX Hybrids
Recently (200 shots ago) replaced my stock 1:40 liner for a 1:16 STX superior heavy liner.
The 1:16 shoots slugs better than the 1:40. But 44.8gr Hades shoot better out of 1:40 as you might expect.
Today, using the heavy liner I was getting .60-.70 groups of 5 shots at 45yds. Then next shot is 1 1/2" north?!?!?? Next shot is low left by an inch?!?!? Then three next three are high an inch, but stacked on top each other.
Well maybe the scope is loose. Nope, checked it. Barrel liner loose, Nope checked it.
I bought the to kill pests humanely. It's not very humane if my vital organ shot hits a leg.
Not happy with my purchase right not.
Yes I cleaned the new STX barrel liner.
I'm getting the same issue with H&N 50gr.
If it were $10 wrench, i would have thrown it. But I did the responsible thing and just put it away for the day.
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You listed everything but, the speed and the SD and or graph of the shots. My first guess is, is your Parallax dead on?? Cause that's what it's sounds like to me.
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Micro at 5 is likely too much at 130bar. But maybe not. Stock hammer seems to be capped anywhere from 125 to 135bar. My M4 700mm gives me around 97% of max speed 20 micro clicks down from 5 at 132bar (it’s a .25 though). You need a chrono to figure this out. Plus, slugs are as*holes to figure out. A .30 Hades will be very humane to ordinary pests
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You are right. Here are the most recent velocities.
There's an Adjustable Objective on my scope set to 40 yds. I would think that would get me close on most shots. I'm open to suggestions.
There's an Adjustable Objective on my scope set to 40 yds. I would think that would get me close on most shots. I'm open to suggestions.
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Greenbeans, I've tried pressures from 90-150. Accuracy has been best at 130 bar for pellets and slugs. I've shot 1500 of the Hades though the 1:40 but was looking for maximum killing power at POI so I bought the slug liner. I may be going back to shooting the Hades. I'm not shooting any critters at more than 60 yds anyway. Any shooting beyond that is just plinking for me.
BTW I did notice small shavings(powder) when i took off the stock, factory, moderator this time. Any comments? Should there be any at all? How much is too much?
BTW I did notice small shavings(powder) when i took off the stock, factory, moderator this time. Any comments? Should there be any at all? How much is too much?
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Well that doesn’t look too bad in terms of fps… To check parallax, put the rifle on target and move your head up and down/left a right (without moving the rifle of course). If crosshairs moves parallax is bad. The numbers on scope can be off substantially. I have some that will sit at the 50 mark when I’m shooting 35y. They’ll get you in the ballpark but not over the finish line.
Other than that, maybe the liner just doesn’t like the hybrids and H&Ns. Mine’s fairly picky as well. Loving H&N though…
Other than that a couple of guesses:
-C3 loose/not fully home (doesn’t look like it though based on fps)
-barrel screw tight?
-hammer bounce and messing harmonics up? Your running it at its limit so no idea whether you’re “at the knee” or not.
-barrel getting dirty (I have one that is an absolute laser for like 75-100 shots and turns to shotgun after that…)?
-moderator clipping in case you use one.
Other than that, maybe the liner just doesn’t like the hybrids and H&Ns. Mine’s fairly picky as well. Loving H&N though…
Other than that a couple of guesses:
-C3 loose/not fully home (doesn’t look like it though based on fps)
-barrel screw tight?
-hammer bounce and messing harmonics up? Your running it at its limit so no idea whether you’re “at the knee” or not.
-barrel getting dirty (I have one that is an absolute laser for like 75-100 shots and turns to shotgun after that…)?
-moderator clipping in case you use one.
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Then why go down the slug rabbit hole? What is the size of your biggest pest? At your described 60 yard distance, in your caliber many critters up to the size of a coyote would be in mortal peril…
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Yeah the powder / shaving in the shroud and hollow can are normal, in particular if you don’t wash/lube pellets. Nothing to worry about imho unless it’s excessive. Maybe try to take the hammer back 15-20 clicks on the micro and see what happens?
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Skunks.
I normally shoot them with a 22LR. It always takes multiple shots to kill them. I got the 30cal M4 because its waayyy quieter than the .22lr. and I thought the .30 cal would have more knock down power. We also have an issue with bobcats killing my chickens. But they are "protected" here in commie-fornia.
I will be testing the parallax adjustment tomorrow. I hope that's the problem.
I normally shoot them with a 22LR. It always takes multiple shots to kill them. I got the 30cal M4 because its waayyy quieter than the .22lr. and I thought the .30 cal would have more knock down power. We also have an issue with bobcats killing my chickens. But they are "protected" here in commie-fornia.
I will be testing the parallax adjustment tomorrow. I hope that's the problem.
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@MarkA, no disrespect intended, but if it takes you multiple shots to kill skunks with a rimfire? Then shot placement is the issue, a shot to the brain = DRT, in the vitals? Lungs, spine, heart, also a quick death. Knock down is achieved through hitting any part of the CNS of targeted critters…
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We can rule out your speeds, they are rock solid.....BUT they may not be right for your particular choice of projectiles. BUT ..... can you do a test without a Mod but....seeing as you are behind enemy lines that might be an issue? I'm leaning more towards the scope or something (barrel) is loose. Knowing FX's assembly folks that is more than a guess. I like my Mavericks...BUT....there I go again....it took a while to get them sorted out, either due to FX's mistakes, a previous owner on one (guy should never ever have been close to anything mechanical), or my own stupidity.
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