PSL offset scope... windage problems at long distance?

the scope for the PSL is offset from the barrel, sitting to the left just a touch.

now, when its sighted right on at 100 meters, what will happen with bullet impact at 500, 800 or even 1000 meters? it seems to me like the impact will be off farther to the left the longer the distance?


btw, i just got my PSL and do i ever love it. once it was sighted in at 100 meters, i had 6 shots inside 1.75".

i'm planning on doing distance shooting with it and would like to clear up the windage issue with the offset scope.

Wish I had some info for you but I am just as interested as you to learn more about this. I will be watching this thread.

when you zero for 200 meters the offset is defeated at 200...the acute tangle growing outside of 200meteres is increasing by a factor of .75 now with the cosine and tangent subjugated for relativity yer lookin at about 8 inches at a 1000 meteres...just spin that turret on over about 7 clicks.

now you've got your 48" holdover at 500 yards with surp ammo...

but I was never good at the cipher'in.

just use kentucky windage...and let us know what happens

here is what i've come up with.

anyone feel free to correct me if they think i'm wrong. but i've really put some thinking into this and i pretty sure this will work.


the center of the scope is offset to the left of the center of the bore by about .75-1.0"

this means that if the scope is right on at 100m, at 200m the bullets will be hitting 1" to the left. and so on

300m= 2" left

400m= 3" left


here is what i've come up with, i am going to adjust the scope so that the average group is impacting 1" to the right at 100m. in theory, this means the average group clear to eternity should still be only 1" to the right of the aiming point. sure, the groups will expand with distance, but the center of the group should still only be 1" to the right.


comments?

here is what i've come up with, i am going to adjust the scope so that the average group is impacting 1" to the right at 100m. in theory, this means the average group clear to eternity should still be only 1" to the right of the aiming point. sure, the groups will expand with distance, but the center of the group should still only be 1" to the right.


comments?

That sounds logical to me and is how I planned to zero my scope.

My good news is that I saw my spinal surgeon today and was given the go-ahead to shoot rifles larger than .22LR as I don't want recoil impact to screw up my surgeries.

here is what i've come up with.

anyone feel free to correct me if they think i'm wrong. but i've really put some thinking into this and i pretty sure this will work.


the center of the scope is offset to the left of the center of the bore by about .75-1.0"

this means that if the scope is right on at 100m, at 200m the bullets will be hitting 1" to the left. and so on

300m= 2" left

400m= 3" left


here is what i've come up with, i am going to adjust the scope so that the average group is impacting 1" to the right at 100m. in theory, this means the average group clear to eternity should still be only 1" to the right of the aiming point. sure, the groups will expand with distance, but the center of the group should still only be 1" to the right.


comments?
Didn't work that way for me today at the range. I zeroed from the bench at 100M using a dead center bull with the point of the top chevron. I was using the new 150gr Privi Partizan commercial loads. I moved to 200m and using the exact hold at the top chevron and aiming dead center the group dropped slightly more than 1" and stayed dead center windage? I thought like you that I'd have to dial one click into the windage turret but didn't. I'm puzzeled and I need to try it at 300 next week. I sure do like this new rifle. Couldn't ask for brighter optics. Everyone that's looked thru the scope has commented how bright it is(1978 dated w/rack number & matched to rifle number) considering it was an issue rifle/scope....Mike

the offset is not a problem.all tech data is here shooting at 8 hundred,9 hundred,1000 yards.
http://www.theakforum.net/phpBB2/viewtopic.php?t=111190

can you copy and paste? i'm not a member with that website

just sign up,it is a great site.
we actually spell it centre but you were close! I was doing a bit of analysis on my posp 8x42d scope offset.
I estimate it is roughly 1cm to the left of the bore. So if I zeroed the scope at 100m and shot at a bullseye at 200m
the impact would be 1cm left of the bull (ideal scenario).

A pic giving the gist although the red scope line would be shifted left onto the 200m bull



At 800m it would be 7cm left of bull. In the scheme of things it doesn't matter much because MOA at 800m is about 23cm anyway.

If you had a 300m zero then the offset hardly matter as centre of impact would only be 1.7cm to left of the bull at 800m.
The further away the windage is zeroed the less the scope offset matters.

So after checking all this out it shows that the offset isn't that big of a deal with the 8x scope at least.
Basically I was wondering whether you had bothered much with offset compensation since you’re doing long range shooting.
_________________
New Zealand Dragunov Tigr owner (620mm barrel).

here is what i've come up with.

anyone feel free to correct me if they think i'm wrong. but i've really put some thinking into this and i pretty sure this will work.


the center of the scope is offset to the left of the center of the bore by about .75-1.0"

this means that if the scope is right on at 100m, at 200m the bullets will be hitting 1" to the left. and so on

300m= 2" left

400m= 3" left


here is what i've come up with, i am going to adjust the scope so that the average group is impacting 1" to the right at 100m. in theory, this means the average group clear to eternity should still be only 1" to the right of the aiming point. sure, the groups will expand with distance, but the center of the group should still only be 1" to the right.


comments?

Im with you and slick on this one, that is exactly how I zeroed mine. Although the mount that im using now is nearly perfectly centered so not as much compensation is required.

The guy bigmegina quoted was me. I think the 8x scope hangs further over toward the barrel so offset issues are further minimised. Here's my post

we actually spell it centre but you were close! I was doing a bit of analysis on my posp 8x42d scope offset.
I estimate it is roughly 1cm to the left of the bore. So if I zeroed the scope at 100m and shot at a bullseye at 200m
the impact would be 1cm left of the bull (ideal scenario).

A pic giving the gist although the red scope line would be shifted left onto the 200m bull
http://i264.photobucket.com/albums/ii191/Grantman_album/offsetscope.jpg
http://i264.photobucket.com/albums/ii191/Grantman_album/2-1.jpg

At 800m it would be 7cm left of bull. In the scheme of things it doesn't matter much because MOA at 800m is about 23cm anyway.

If you had a 300m zero then the offset hardly matter as centre of impact would only be 1.7cm to left of the bull at 800m.
The further away the windage is zeroed the less the scope offset matters.

So after checking all this out it shows that the offset isn't that big of a deal with the 8x scope at least.
Basically I was wondering whether you had bothered much with offset compensation since you’re doing long range shooting.

Jaykden~

Not ideal for pretty X's but what ifya dial a bit of R/Windage in now?
Say dial in your groups to 1" R of the Bull (X's) @ 100 yards..
For the sake of discussion @ 2-300 maybe your nuts centered, and then @ 4-500 your an 1" Left..

For longer distance you can dial in a touch more windage and you would be GTG..

Of course my numbers are just an example and may not prove out but you can get the idea..

mike,

yeah, thats how i'm planning on doing it... bullet impact an inch to the right, i should be good to go farther on out.


i'm getting good groups now with the hotter loads of 48.0 grns of IMR 4895, pushing a speer .311" 150 grn SP

had 6 rounds go under 2 MOA, more like 1.75


the PPU ammo shot like crap in it. i have some hungarian LB from aim but i haven't tried it yet.

now, i just need to load up a bunch more of the IMR 4895 loads.

Seems like a logical way to dial in to me..
Sounds like you rifle is shooting well.. I have so much X 54R surplus on hand I have yet to handload for the X 54R in this rifle or my FINNS but I do plan on doing so and have dies as well as brass on hand..

I was gonna try .308 Bullets first but may try both when I get ready..
Good to know that 4895 is a good powder I have some of that as well..

I understand the Hungy L/B is good stuff, my gun shoots the CZECH L/B very well but I have not tried the other yet?

[handload for the X 54R in this rifle or my FINNS but I do plan on doing so and have dies as well as brass on hand..

I purchased the 7.62X54R factory crimp die from Lee. It's and excellent tool if you start reloading the 54R for semi-auto. Just a heads-up.......Mike

I do have the LEE FCD in several calibers and have begun using them recently.. It does seem to be a good tool,it does apply a nice even crimp,& I like that the cases don't all have to be the exact length..

Mostly just using it while loading .308 for the FAL's right now but plan on trying W/Others..

Thanx for the tip..