Question about Pentax 4.5X-14X 42mm Pioneer Matte Rifle Scope

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Crosshairs on pentax 4.5x14x42 don't move

I turn elev. or windage and the crosshairs in the scope do not move.

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With modern rifle scopes the crosshairs do not move.They are designed so that the crosshairs are always centered.I have not seen a scope with crosshairs that move for about 40 years.If your scope has 1/4 minute clicks, then the strike of the bullet moves 1/4 inch at 100 yards for every click.1 inch for 4 clicks and so on.If you rifle shoots 6 inches high at 100 yards you should turn it down 24 clicks to strike dead on.Many hunters and shooters adjust their scopes to strike 1 1/2 inches high at 100 yards.Then it will be accurate to about 300 yards without further adjustment.

Posted on Mar 25, 2009

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It's a common misconception that you are moving the bullet's impact on the target... the bullet is hitting where the rifle is pointing and you want to get the scope to look at that very same spot.
To move the scope's reticle up or down, turn the elevation adjustment on the TOP of the scope in the direction you want the scope to look, so if your shooting low, turn the scope's adjustment in the DOWN direction.
If you want to move the direction the scope is looking left or right, turn the windage adjustment on the RIGHT side of the scope left or right to look where the bullet is impacting. To move the crosshairs to the right, turn it right.
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2 Answers

Windage and elevation not working barska 8-32*50mm


I doubt if there is anything wrong with your scope.
The Baraska model A10810 Reticle adjustments are 1/8 ( 1/8 inch) MOA (minute of angle).
For instance, Look at the top turret (The ELEVATION Adjustment Knob). You will see that there are little vertical 'hashmarks' all the way around the knob starting with a '0' then a series of the verticle hashmarks, then a '1' and another series of the marks, then a '2' and so on. YOUR scope will have 8 of those vertical 'hashmarks' between each 'number'. These little 'hashmarks are referred to as 'Clicks' or 'Minute of Angle' adjustments.
Now imagine that you are set up on the 100 yard line and you have fired a round at your target, say a one inch diameter dot or any size for that matter, and the bullet strike was one (1) inch LOW and two (2) inches to the RIGHT and of course you now want your next round to impact in the target dot.
To bring your bullets point of impact UP to coincide with your point of aim (you have your 'crosshairs or RETICLES centered on the dot), you will be turning the TOP adjustment knob CLOCKWISE, ONE 'click' at a time. EACH one of those 'Clicks' will actually move the horizontal Reticle UP (Elevation) or DOWN 1/8 of an inch at a time. If the bullets point of impact was 1 inch LOW, you would need to turn the adjustment knob clockwise Eight (8) clicks which will equal ONE (1) inch.
Now you must adjust the knob on the RIGHT side of the scope. This one is the WINDAGE Adjustment knob which controls the VERTICAL Reticle and moves the point of impact Right or Left. This knob will also have the 'hashmark' increments around its perimeter and like the Elevation knob each 'Click' will move the Reticle 1/8 of an inch but in this case the Reticle and point of impact moves Right or Left.
Remember the bullets point of impact was 2 inches to the RIGHT. This means you must adjust the Reticle or point of impact to the LEFT so that your point of impact will coincide with your point of aim and will be in the target dot. Turn the adjustment knob COUNTER CLOCKWISE Sixteen (16) Clicks. Keeping your POINT of AIM (crosshairs centered on the dot), your next round should be inside the dot and you can then fine tune it from there.
As you can see from this example, the Reticle (crosshairs)and point of impact does not travel very far at all inside your scope at the 100 yard distance so it is not hard to imagine that you thought they were not adjusting to get you on target, when in fact they WERE adjusting, but in tiny increments.
Now, as you create more distance between you and your target, these 'tiny' increments and point of impact will be larger as your distance increases. For example, at 200 YARDS each 'click' will move your Point Of Impact 1/4 of an inch right,left,up, or down. So if your bullet point of impact was one (1) inch low from the 200 yd line you would adjust your Elevation Reticle 4 Clicks to raise your point of impact in order to be on target. At the 300 yd line each Click will adjust the point of impact up,down,right or left, ONE (1) inch.
If you wish, I would be happy to walk you through the 'ZEROing In' of your scope and rifle even if you do not have a Zero Bore Scope. With-in about 9 rounds you can be hitting where you are aiming instead of 'chasing' bullet holes all over the paper.
If you are interested, respond back and I will be glad to assist you. Enjoy. :)

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2 Answers

Lost manual for trophy scope 3-9x40 rifle


There is no manual for elevation and windage adjustments. (at least not one that comes with your scope; all your scopes manual will say is whether its FFP or SFP (First Focal Plane or Second Focal Plane, the scale used on your scope for mil dots)(you can get this info by finding a store that sells this scope and asking a sales rep)

To adjust for elevation and windage you have to take into account the daily factors (unless your shooting in the same indoor environmental controlled shooting range each day you SNOB! jk

The formula takes alot of variables into account and is known as Exterior Ballistics

!) Environmental Factors - First thing you account for.

A) Elevation from sea level plays a large part into your environmental adjustments. Your elevation from sea level determines largely the Barometirc Pressure but it also varies slightly with Temp and Humidity (Major Factor)

B) Temperature - The temperature can affect the density of the air. The hotter it is the thinner it is and therefore less resistance and a higher bullet trajectory (Minor Factor)

C) Humidity - This again will affect the densify of the air infront of your bullet (Minor Factor)

D) Barometric Pressure - The other large factor in air density this is the base stat that the others modify

These all combined create a ratio that you apply to standard MOA (windage and elevation adjustments) to obtain the shooting information for that particular environment)



2) Bullet Factors (Listed on the Box you buy) - There are a few bullet factors to take into account.

A) Speed - the bullets feet per second can vary as much or more than 500 feet per second with the
same caliber ammunition.
B) Grain - The Grain of an ammunition is a measure fo its "Sectional Density" or weight to volume
ratio
C) Ballistic Co Efficient - This number is the measure of the bullets ability to maintain its speed
during flight. This also varies from Grain to Grain


These factors are complex and a pain for the best of shooters to determine. adding to that confusion. there are many ways to determine a bullets ballistics coefficient and each one gets a different number. In this case bullet data is best retieved from the manufactuerers box and take their word for it.

3) Lastly you account for shot factors.

A) Range - by referencing your standard elevation MOA adjustments and mutliplying by the ratio for environment the Elevation MOA is achieved.


B) Windage - Windage is done in inches per mile per hour then is multiplied by the Mph of the wind.
In order to be precise the windage is done in inches instead of MOA. it needs to be converted heres and example.

You Ballistics Cheat Sheet for the day says the windage at 900 yards is 5.2 Inches per mph of wind.
you apply the ratio for your environment .90 (all example numbers. this number would represent a shooting environment with an air density lower than standard/ the cheat sheet's known MOA adjustments). the 5.2 inches is multiplied by .9to acheive 4.68?? idk the point is you mulitply that by the wind of 10 mph to achieve a total of 46.8" of wind drift to the target.

now for the conversion to MOA. 1 MOA is eqaul to 1.047" per 100 yards. meaning for every 1 moa you adjust the bullet will move 1.047" per 100 yards (our target is 900 yards; meaning that each MOA for this target is 9*1.047" = 9.423" per MOA adjustment. so take that number and divide our total wind drift by it. ie 46.8 / 9.423 = MOA Windage Change of 4.9665... now you need to know whethere your scope is 1/4 minute clicks or 1/8 minutes (how many spaces between large numbers?) you would adjust to 5 MOA for a 1/4 minutes scope equaling 20 clicks on an 1/8th minute scope it would be 40 clicks.

This is the math of shooting. to learn how go to
WWW.shooterready.com they are an excellent sight to get the math down WITHOUT wasting ammo. Once you have the math you an transfer it to your gun. waste a few rounds checking it out and youll be hitting targets @ 1800 yards in no time

I like to take the simple way after i learned how to do the hard way

There is software tha will do the exterior calcualtions for you.

if your interested i use Sierra Infinity V6 Ballistics Software

GL


Dec 08, 2008 | Bushnell Trophy 3-9x40 Rifle Scope, Matte...

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