FX M4, impact problem at 100 yards

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SNEYDER FX .

SNEYDER FX .

Member
May 18, 2025
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Michigan
* Hello everyone I hope you have a nice afternoon, I'm here looking for some kind of help or recommendation what should I do with my FX M4 .22 700mm sniper, I'm currently shooting 32 to 34gr slug, my highest point of impact is at 50 yards with a velocity of 960fps, at 50 yards I can make about 30 shots very consistent accurate, the problem is when I change to 70, 80, 90, 100 yards, the point of impact Automatically MOVES TO THE RIGHT About 3 centimeters, the further away you have the target the more it continues impacting to the right but the consistency of the groups are almost perfect 23.78mm MOA at 100 yards, but I need help or know how to do so that it does not make this impact to the right my M4 has many improvements.

HOW TO:
1- Barrel swap for a 700mm STX heavy duty barrel.
2- Carbon fiber barrel.
3- M3 barrel clamp with two bolts.
4- Carbon fiber barrel tensioners.
5- SUMÓ DONNYFL silencer.
6- Slug power kit.
7- Digital pressure gauge behind the grip.
8- TRS rail.
9- ARCA rail.
10- New telescopic sight.

I WOULD APPRECIATE YOUR HELP. I honestly don't know what to do with this problem anymore, but everything is working correctly afterward. I would appreciate your answers. Thank you.
 
What are your group sizes at 50 yards? How many different types of pellets have you tried? Different types, makes and weights? My suggestion is to get a good group size with just one type of pellet at 50 and zero for the X ring. Then put air pressure back where you started and without changing anything at all, 2 rounds at 50, 75 and 100 and see what group sizes are and point of impact. If it’s still all over the place clean the barrel and make sure all other maintenance is current. Repeat the process in the same wind, temp and humidity conditions, preferably the same time of day. Compare the results and if they are equally bad then something is wrong with the gun. Maybe a loose screw, scope mount, something is wrong. Last year I took my 2078A to a match and a gun that normally gives sub moa groups was all over the place. The barrel needed cleaning, problem solved. If this is a new gun it may just need to have a few hundred shots through it but I don’t think that’s the problem here. It’s either simple or you need to have it serviced.

Rick H.
 
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RickH said:
What are your group sizes at 50 yards? How many different types of pellets have you tried? Different types, makes and weights? My suggestion is to get a good group size with just one type of pellet at 50 and zero for the X ring. Then put air pressure back where you started and without changing anything at all, 2 rounds at 50, 75 and 100 and see what group sizes are and point of impact. If it’s still all over the place clean the barrel and make sure all other maintenance is current. Repeat the process in the same wind, temp and humidity conditions, preferably the same time of day. Compare the results and if they are equally bad then something is wrong with the gun. Maybe a loose screw, scope mount, something is wrong. Last year I took my 2078A to a match and a gun that normally gives sub moa groups was all over the place. The barrel needed cleaning, problem solved. If this is a new gun it may just need to have a few hundred shots through it but I don’t think that’s the problem here. It’s either simple or you need to have it serviced.

Rick H.
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Hi, 👋 I clean the barrel, I have already tried all distances, from 35 yards to 120 yards to 50 yards the point of impact is fine 0.5 MOA inches, at 100 yards the group will open up a little slightly 1.047 inches, but the point of impact at 100 yards shifts slightly to the right 3 centimeters, which it should not do.
 
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As thomasair said, your scope must be perfectly Level or as you move out in distance you will move on your MOA clock dial left or right instead of up and down with your elevation turret. Not something to dismiss. Before looking at Airgun as problem look at set up first. could save you lots of money and frustration. it’s a foundation of accuracy.
 
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SNEYDER FX . said:
* Hello everyone I hope you have a nice afternoon, I'm here looking for some kind of help or recommendation what should I do with my FX M4 .22 700mm sniper, I'm currently shooting 32 to 34gr slug, my highest point of impact is at 50 yards with a velocity of 960fps, at 50 yards I can make about 30 shots very consistent accurate, the problem is when I change to 70, 80, 90, 100 yards, the point of impact Automatically MOVES TO THE RIGHT About 3 centimeters, the further away you have the target the more it continues impacting to the right but the consistency of the groups are almost perfect 23.78mm MOA at 100 yards, but I need help or know how to do so that it does not make this impact to the right my M4 has many improvements.

HOW TO:
1- Barrel swap for a 700mm STX heavy duty barrel.
2- Carbon fiber barrel.
3- M3 barrel clamp with two bolts.
4- Carbon fiber barrel tensioners.
5- SUMÓ DONNYFL silencer.
6- Slug power kit.
7- Digital pressure gauge behind the grip.
8- TRS rail.
9- ARCA rail.
10- New telescopic sight.

I WOULD APPRECIATE YOUR HELP. I honestly don't know what to do with this problem anymore, but everything is working correctly afterward. I would appreciate your answers. Thank you.
Click to expand...
There's a couple ways to handle this, but i should say that my 700 pellet liner didn't like any slugs over 23 grains. I believe the choke was upsetting things on the longer slugs.

You could take the liner nut off at the end of the barrel tube and index your liner 90 degrees counter clockwise. Test this and see if it fixes the windage issue. Don't do this till you know you aren't tilting the gun and causing the issue and that your scope is well aligned.

I took my 700 mm down the slug route and feel it greatly degraded the enjoyment of the gun. If you have space where you could shoot a firearm, by all means keep going because you will be in rimfire power territory. My gun has all the mods you mentioned, except it's an m3 so I have a bottle regulator too. Ive taken squirrels and rabbits at 150+ yards with 23 slugs too. They do a really good job in the wind too.
 
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SNEYDER FX . said:
* Hello everyone I hope you have a nice afternoon, I'm here looking for some kind of help or recommendation what should I do with my FX M4 .22 700mm sniper, I'm currently shooting 32 to 34gr slug, my highest point of impact is at 50 yards with a velocity of 960fps, at 50 yards I can make about 30 shots very consistent accurate, the problem is when I change to 70, 80, 90, 100 yards, the point of impact Automatically MOVES TO THE RIGHT About 3 centimeters, the further away you have the target the more it continues impacting to the right but the consistency of the groups are almost perfect 23.78mm MOA at 100 yards, but I need help or know how to do so that it does not make this impact to the right my M4 has many improvements.

HOW TO:
1- Barrel swap for a 700mm STX heavy duty barrel.
2- Carbon fiber barrel.
3- M3 barrel clamp with two bolts.
4- Carbon fiber barrel tensioners.
5- SUMÓ DONNYFL silencer.
6- Slug power kit.
7- Digital pressure gauge behind the grip.
8- TRS rail.
9- ARCA rail.
10- New telescopic sight.

I WOULD APPRECIATE YOUR HELP. I honestly don't know what to do with this problem anymore, but everything is working correctly afterward. I would appreciate your answers. Thank you.
Click to expand...
As to your shift to the right goes I think you need to index your barrel . I have been there and done it with my M4 22 SNIPER !
 
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