Sighting up with open sights

[Shaunm41 14]

Hi guys.. Got my new rear sight today (thanks to gurtwurz, top bloke) but Im having trouble sighting it up.. Have set up a target at a measured 10yrds, set up a table with a few pillows to rest the rifle on to keep it steady.. I have set the windage so the groups are spot on on the line where I want them, but it is shooting too high (about 2 inch) and the elevation setting is as low as it goes. its just a cheap rifle, SMK 2.2 underleaver. It had a fixed front sight and adjustable rear sight located at the front of the stock, which I have just replaced having broke the original..

 

At what range would the shots land 2 inch lower?

 

Im new to this so sorry if any of that sounds abit daft.

 

Thanks

Shaun

 

Just done 6 small rings about 1cm wide and hit each one spot on from 10yrds by aiming 1 3/4 inch below it.

Edited June 30, 2010 by Shaunm41

[markha 99]

I think the best thing to do is go somehwere that you can measure out some different distances and put targets up, Im sure with a bit of time you will find out where the sights, at the lowest setting you have, produce a 'zero' from there you can work out longer and shorter ranges by aiming higher or lower.

 

To work out where your zero point would be I would need the pellet weight you are using and the ftlbs of the gun, a quick google gave power as anywhere between 7 and 9 ftlbs.

 

Based on a 15gr 22 pellet and 7ftlbs and your point of impact being (poi) 2" high at a measured 10 yards would mean your zero with your sights set at it lowest point would be 31.5 yards.

 

If your gun has 9ftlbs and a 15gr pellet the zero with your sights set at their lowest woul be around 37 yards.

 

Cheers

Mark

[markha 99]

Just a quick thougth on iron sights - The slider on the rear sight would be slid to the very bottom for longer distances and raised higher up for closer distances, so if you have slid your sight to the lowest point it can go ie close to the body of the gun, then you have set the zero for long distance.

[Shaunm41 14]

I think the best thing to do is go somehwere that you can measure out some different distances and put targets up, Im sure with a bit of time you will find out where the sights, at the lowest setting you have, produce a 'zero' from there you can work out longer and shorter ranges by aiming higher or lower.

 

To work out where your zero point would be I would need the pellet weight you are using and the ftlbs of the gun, a quick google gave power as anywhere between 7 and 9 ftlbs.

 

Based on a 15gr 22 pellet and 7ftlbs and your point of impact being (poi) 2" high at a measured 10 yards would mean your zero with your sights set at it lowest point would be 31.5 yards.

 

If your gun has 9ftlbs and a 15gr pellet the zero with your sights set at their lowest woul be around 37 yards.

 

Cheers

Mark

 

Hi mate, Thanks for your reply. So is it basicly a case of practice and learn where I need to aim at each given range to land the pellet in the right place? I can now aim correctly at 10 yards and land the pellet where I want it aiming 2 inch below. I have no idea what the pellets weigh, they are milbro jet pellets that I have just been using for a bit of target shooting.

 

I think I would be better with a scope fitted so once funds will allow I will invest in one.

[Shaunm41 14]

Just a quick thougth on iron sights - The slider on the rear sight would be slid to the very bottom for longer distances and raised higher up for closer distances, so if you have slid your sight to the lowest point it can go ie close to the body of the gun, then you have set the zero for long distance.

 

Hi thanks for your reply, I set it to the lowest point but if I raise it higher the shots land higher..

[markha 99]

Hmmm, Iron sights can be tricky, the way used to do it in army was, rifle in fixed position, shhot at large target, then with out moving the rifle from the position it was in when the shot was taken! adjust the windage so the sight droped in line with the point of impact, then did the same with the elevation, however we used to be able to slide the sight forwards and backwards a click at a time on the base plate.

 

To move the line of sight DOWN (the shot hit BELOW the point of aim) the REAR sight is RAISED or the FRONT sight is LOWERED.

To move the line of sight UP (the shot hit ABOVE the point of aim) the REAR sight is LOWERED or the FRONT sight is RAISED.

Edited June 30, 2010 by markha

[JackReid 35]

If your wanting to shoot live animals mate you may need a more powerful rifle for the further distances but I'm sure its fine for closer range work!

Hope you get on ok.

 

Jack

[Shaunm41 14]

If your wanting to shoot live animals mate you may need a more powerful rifle for the further distances but I'm sure its fine for closer range work!

Hope you get on ok.

 

Jack

 

What sort of distances? doubt i would shoot owt live above 20 yards anyway

[andyfr1968 772]

Hi, mate.

 

Is there any way to remove the front sight's blade, pin, whatever (sorry, I'm not familiar with SMK) 'cos if you can lengthen the front sight by 2 or 3mm it should bring it back into a useable adjustable range from what you've said.

 

Cheers.

[Shaunm41 14]

Hi, mate.

 

Is there any way to remove the front sight's blade, pin, whatever (sorry, I'm not familiar with SMK) 'cos if you can lengthen the front sight by 2 or 3mm it should bring it back into a useable adjustable range from what you've said.

 

Cheers.

 

Hi mate, The front sight is fixed but there is 2 retaining nuts either end and the blade can be removed, its just like a ring with a blade sticking up, no way to lenghthen it but im sure I could get another made up.. would that work?

[andyfr1968 772]

Hi, mate.

 

Is there any way to remove the front sight's blade, pin, whatever (sorry, I'm not familiar with SMK) 'cos if you can lengthen the front sight by 2 or 3mm it should bring it back into a useable adjustable range from what you've said.

 

Cheers.

 

Hi mate, The front sight is fixed but there is 2 retaining nuts either end and the blade can be removed, its just like a ring with a blade sticking up, no way to lenghthen it but im sure I could get another made up.. would that work?

 

Yes it would.

 

If you can raise the front sight it'll lower the line of the barrel in relation to your sight line so it will bring the point of impact down. 2 or 3 mil sould be about right from what you've said to bring the sight back in to it's proper adjustment.

 

Good luck and let us know how you get on.

[Shaunm41 14]

Hi, mate.

 

Is there any way to remove the front sight's blade, pin, whatever (sorry, I'm not familiar with SMK) 'cos if you can lengthen the front sight by 2 or 3mm it should bring it back into a useable adjustable range from what you've said.

 

Cheers.

 

Hi mate, The front sight is fixed but there is 2 retaining nuts either end and the blade can be removed, its just like a ring with a blade sticking up, no way to lenghthen it but im sure I could get another made up.. would that work?

 

Yes it would.

 

If you can raise the front sight it'll lower the line of the barrel in relation to your sight line so it will bring the point of impact down. 2 or 3 mil sould be about right from what you've said to bring the sight back in to it's proper adjustment.

 

Good luck and let us know how you get on.

 

Cheers mate i will have a go at that..

[romany52 313]

I would work on the front site with the rear adjustment in the middle of its travel to get the zero at the range you require, once you've done that, you've got rear site adjustment for longer or shorter ranges.

[Shaunm41 14]

I would work on the front site with the rear adjustment in the middle of its travel to get the zero at the range you require, once you've done that, you've got rear site adjustment for longer or shorter ranges.

 

Cheers fot that mate.. What would be the best range to set the zero at?

 

The rifle is a SMK XS36-1.22 and the spec says its approx 560fps

[Shaunm41 14]

Right I have managed to make up something adding another 2 - 3 mm to the blade on the front sight, I have set the zero at 10 yards and its spot on now, it left me with a bit of play downwards on the rear sight aswell.. now to move to 20 yards and see what happens..