8x POSP on a PSL

[Prod]

I have an 8x POSP scope mounted to my PSL. I tried to sight it in on Saturday, but with the reticule as high as it would go, the rifle was still shooting high. Impacts were 2-3 feet above the point of aim at 200 yards. I'm wondering if my scope rail is not properly aligned or if I'm using the elevation knob inappropriately. I'm aware that there is a difference between meters and yards, but when the elevation was set for 100 meters and the rifle was shot at 200 yards, the bullets were still about a foot above the point of aim.

I'm a bit confused about the elevation settings. The manual says that the numbers represent every 100 meters and the half marks represent 50 meters. Then it says that you set it to "1" for 100m. The thing is, there are only even numbers 0-20, there is no "1". It also says to sight in at 50m using the half mark between "0" and "1". Once again, there is only a 0 and a 2. The thing is that if 0-20 corresponded directly to meters, then this scope has elevation adjustments out to 2000 meters, which seems a little silly to have chevrons for bullet drop past 1000 meters if you can just set the elevation for that. (Not to mention the obvious effectiveness and accuracy issues that would occur at such extreme ranges.) So my theory has been that the numbers x100/2 reflects the range in meters (2=100m, 20=1000m). Can anyone confirm or deny this?

The next topic is that regardless of whether or not my elevation settings are right, my reticule is as high as it will go and the rifle is still shooting high. I'm interested in shimming to fix this. I've read to cut aluminum from cans to use as shims. My question is: where is the best spot to put the shims? Is there a way I can permanently fix them in the mount or do I just jam them between the rail and the mount?

Thanks for the help.

 

[Eightball]

Then it says that you set it to "1" for 100m. The thing is, there are only even numbers 0-20, there is no "1".

How many clicks between even numbers? if two, use a half click.

It's been a while since I've hauled out my Saiga with an 8x PSOP on top, might have to do so to help you out.

As for shimming it......sounds weird to me, never heard of having to shim a PSOP series.

 

[ClickClickD'oh]

First thing to remember with the POSP scopes is that adjustments are backwards compared to the scopes we normally use in the west. On a US scope, if you shot 1" left at 100 yards, you would adjust to the right 1 MOA. On a Russian scope if you shoot left 1" at 100 yards you adjust the scope left 1 MOA. I suspect you may have been raising the bullet impact while trying to lower it.

As for the knob, each click of adjustment is 50 yards. The hashes are hundreds of yards. The knob has 0 and 2 marked, but there should be a hash between the two. That is 100 yards. There should be a click between the 0 and the hash and another between the hash and the 2. Those are the 50 and 150 marks.

 

[stubbicatt]

These scopes, some of them, came with MOA type adjustments as opposed to ranging adjustment marks on the elevation knob. Perhaps yours is one of these?

 

[Prod]

Ok, so I had the elevation set wrong. Thanks for the clarification. I may still have an issue with zeroing; I'll check it out my next trip to the range. (Which will be this weekend at the latest.)

 

[wally]

First thing to remember with the POSP scopes is that adjustments are backwards compared to the scopes we normally use in the west. On a US scope, if you shot 1" left at 100 yards, you would adjust to the right 1 MOA. On a Russian scope if you shoot left 1" at 100 yards you adjust the scope left 1 MOA.

I don't understand this. You can look thru the scope and move the dials to watch the POA move relative to the POI. With non-US scopes its a crap shoot as to if the L-R U-D markings refer to POI or POA, but its easy to see if you look as you turn.

My 6X POSP scope had the elevation knob mounted offset by 180 degrees. Straightened that out and was pretty close to zero at 100 yards. Still had to shim the windage to have a reasonably close to symmetrical L-R adjustment. I cut out pieces of a coke can and put them under the screws that hold the riser to the rail mount on the front to move the POA to the left. But I had to loosen all the screws to do so.

--wally.

 

[Prod]

Ok, with the elevation set correctly, I was on target at 200 yards. However, at 300 yards most of my shots were still landing about a foot above the point of aim. Now, the range is set for meters, so 328 yards is actually 300m, so I'd expect to be a little high, but not a foot. Can any ballistics experts shed more light here? My other theory is that I wasn't lined up on the scope properly.