Split grouping problem

[shaun22 0]

Can anyone offer some insight to a problem I'm having?

 

I have a Falcon FN19 in .22, with a 3-9x50 scope. Using JSB Exact pellets, and =< 12ftlbs. Accupels produced about 30% flyers.

 

At first I thought that it was grouping poorly, but using a rest and shooting 20+ pellets for each test it seems I get two seperate cloverleaf groups at 25 meters. Both groups are about 5mm center to centre and seperated by about 20mm.

 

The scope has loads of vertical adjustment left, its not topped out at all, and the effect is not so much a horizontal string as two definite groups. Scope mounts etc are tight.

 

Any help appreciated.

[Holdaway 2]

Are your groups one above the other or side by side?

 

Are the two groups using the same ammo or the accupels and JSB's?

[shaun22 0]

Are your groups one above the other or side by side?

 

Are the two groups using the same ammo or the accupels and JSB's?

 

Side by side, perfectly horizontal. The quoted groups is JSBs only. My first thought was slack reticule, but there is loads of adjustment left, it close to being central in fact.

[Holdaway 2]

Well the obvious thing to look for would be slippage. Check that the scope hasn't crept at all and that it is tight but not overtight, Then clean the barrel, sometimes the tiniest particle of residue can throw a shot off, not usually that consistantly though I grant you.

 

Are your pellets lubed? Fresh from the tin or in a pouch/pocket?

[Malt 379]

It might sound daft, but are you shooting from the same position for both of the groups? Or holding the rifle in the same way? Was there any cross wind? Did you do anything to the scope or the rifle in between shooting the two groups? Was it shooting the two groups equally, eg. 5 to the right, then 5 to the left or was it one to the left, one to the right etc? Is the barrel loose? Sounds very strange, I've never heard of anything like that before.

[shaun22 0]

Well the obvious thing to look for would be slippage. Check that the scope hasn't crept at all and that it is tight but not overtight, Then clean the barrel, sometimes the tiniest particle of residue can throw a shot off, not usually that consistantly though I grant you.

 

Are your pellets lubed? Fresh from the tin or in a pouch/pocket?

 

No lube but fresh from a new tin. Quick vusual for damage.

[shaun22 0]

It might sound daft, but are you shooting from the same position for both of the groups? Or holding the rifle in the same way? Was there any cross wind? Did you do anything to the scope or the rifle in between shooting the two groups? Was it shooting the two groups equally, eg. 5 to the right, then 5 to the left or was it one to the left, one to the right etc? Is the barrel loose? Sounds very strange, I've never heard of anything like that before.

 

I ensured that I minimised any movement. All shots were taken indoors @ measured 25 meters without shifting my forearm,body or foot position. The gun/scope was kept us upright each time.

The two groups kind of evolved slowly. If you shot a 3 or 5 group it just looked loose. Only when you started to do 10 plus did it become obvious there were actually 2 very good groups side by side.

Scope, barrel, stock is all tight.

 

The sad part is my micky mouse crosman co2 can shoot just as well or better

[B moocher 0]

sounds to me like your posture and breathing might be causing you a bit of a problem. and all ex-service person will probabl

y say the same. find a resting position that you are comfortable with, so there is no cause to move,slow breathing and on your in breath hold and squeeze the trigger .but dont snatch at the shot.

[Malt 379]

sounds to me like your posture and breathing might be causing you a bit of a problem. and all ex-service person will probabl

y say the same. find a resting position that you are comfortable with, so there is no cause to move,slow breathing and on your in breath hold and squeeze the trigger .but dont snatch at the shot.

I read that you're supposed to hold half way through the out breath, then pull the trigger! Works for me!

[shaun22 0]

sounds to me like your posture and breathing might be causing you a bit of a problem. and all ex-service person will probabl

y say the same. find a resting position that you are comfortable with, so there is no cause to move,slow breathing and on your in breath hold and squeeze the trigger .but dont snatch at the shot.

 

Quite possible, except its just this rifle not my other. I'm quite aware of my pulse changing my aim, not just breathing.

[gilly-93 31]

check all screws and the scope mounts see if there tight then see how you go on

[Holdaway 2]

Ok, one more thing. Does your scope have afocus ring at the back next to your eye?

 

If it does, screw it in by a few turns, when I shot many years ago as a beginner, I had a problem where the shots were splaying out by about 3 inches at 500 yds ( rifles mind not airguns), it turned out I had not set the scope back far enough and so tried to compensate by screwing out the eye peice to meet my eye.

 

My sergeant kicked my arse...

[Holdaway 2]

sounds to me like your posture and breathing might be causing you a bit of a problem. and all ex-service person will probabl

y say the same. find a resting position that you are comfortable with, so there is no cause to move,slow breathing and on your in breath hold and squeeze the trigger .but dont snatch at the shot.

I read that you're supposed to hold half way through the out breath, then pull the trigger! Works for me!

 

 

The last part is correct. The shot should be taken at a half expelled breath and the trigger is squeezed not pulled.

 

Personally I think it is mechanical.

 

Let us know how you get on and what the prob was if you fix it. We all need the knowledge.

 

H

[stillair1 16]

Hi

my monies on accupell fouling the barrel with lead/metal deposits, they are notorious for it. Try cleaning with a pull through and some wd40 on some napier cloth. Then just shoot jsb and see how they settle down.

Another possibility is a duff tin of pellets if this is a new tin you have just started to use. Solution there would be to go back and try an earlier batch if possible.

 

Neil

Edited April 7, 2008 by stillair1

[B moocher 0]

sounds to me like your posture and breathing might be causing you a bit of a problem. and all ex-service person will probabl

y say the same. find a resting position that you are comfortable with, so there is no cause to move,slow breathing and on your in breath hold and squeeze the trigger .but dont snatch at the shot.

I read that you're supposed to hold half way through the out breath, then pull the trigger! Works for me!

 

 

The last part is correct. The shot should be taken at a half expelled breath and the trigger is squeezed not pulled.

 

Personally I think it is mechanical.

 

Let us know how you get on and what the prob was if you fix it. We all need the knowledge.

 

H

 

 

U MUST BE RIGHT MATE AND THE BRITISH FORCES WERE WRONG FOR 9 YEARS LOL