scope set up

[chet]

was shooting yesterday at a local shoot. scope zeroed at 200yds, 5 steels cleaned them, so we go to 300yds ok there cleaned them. off to 450yds my first hit was off to the left about 2 inches was a hit then off to the 4" steel missed off to the left, so on the way home i was thinking if the scope is not set correctly which i really took my time setting it up, i am thinking of a test, if i shoot at 100yds and crank the scope up for example to the 800yd mark and take another shot, if the bullet is directly in line with the first bullet would this mean scope is set properly. trying to figure as i get out past 300yds is where i notice my POI starts favoring left

chet

 

[JohnKielly]

Likely not you at all. If your rifle barrel isn't concentric with the action, or if the mounting screws on the action or your scope base(s) aren't drilled true, for example, it gets a worse issue the further back you get.

Try setting a straight edge along the side of the scope mounts & see if it points along the same line as the barrel. You might need somebody's help with that.

If it's not all lining up, you could try adjustable scope mounts to take the crooked out of things.

Of course, if your crosshairs aren't plumb or you have one of those scopes they mention occasionally that haven't had the crosshairs fitted square to the adjustment screws......

 

[Rob01]

Wind? Even if you think it's not there it can be.

That said running a check on your scope will allow confidence in your system. I run tall target tests on my scopes after mounting to test tracking and make sure it's level. I usually go up to 10 mils or around 35-40 moa to make sure it tracks.

 

[chet]

Likely not you at all. If your rifle barrel isn't concentric with the action, or if the mounting screws on the action or your scope base(s) aren't drilled true, for example, it gets a worse issue the further back you get.

Try setting a straight edge along the side of the scope mounts & see if it points along the same line as the barrel. You might need somebody's help with that.

If it's not all lining up, you could try adjustable scope mounts to take the crooked out of things.

Of course, if your crosshairs aren't plumb or you have one of those scopes they mention occasionally that haven't had the crosshairs fitted square to the adjustment screws......

john

i hope not, i know it can happen to any scope, mine is the Sightron SIII 8x32x56

 

[Richard Coody]

was shooting yesterday at a local shoot. scope zeroed at 200yds, 5 steels cleaned them, so we go to 300yds ok there cleaned them. off to 450yds my first hit was off to the left about 2 inches was a hit then off to the 4" steel missed off to the left, so on the way home i was thinking if the scope is not set correctly which i really took my time setting it up, i am thinking of a test, if i shoot at 100yds and crank the scope up for example to the 800yd mark and take another shot, if the bullet is directly in line with the first bullet would this mean scope is set properly. trying to figure as i get out past 300yds is where i notice my POI starts favoring left

chet

Yeah

That will work

Do you have a.scope level on your.rifle? It very well could be you are.canting.the rifle

 

[dkhunt14]

A slight cant or scope not straight will show up more the farther out you get. At 100 or 200 it isn't very noticeable unless it's really crooked. Could also be wind that you think isn't present. Doesn't take much wind to miss a few inches at 300.

Depending on bullet, speed of bullet and caliber, a barely noticeable wind can move a bullet a couple of feet at 450 yards. Also could be shooting form and at that distance it is just starting to show. Are you shooting off rest, bipod, shooting sticks or something else? Do you have wind flags? What caliber, bullet and speed are you Shooting? Matt

 

[chet]

A slight cant or scope not straight will show up more the farther out you get. At 100 or 200 it isn't very noticeable unless it's really crooked. Could also be wind that you think isn't present. Doesn't take much wind to miss a few inches at 300.

Depending on bullet, speed of bullet and caliber, a barely noticeable wind can move a bullet a couple of feet at 450 yards. Also could be shooting form and at that distance it is just starting to show. Are you shooting off rest, bipod, shooting sticks or something else? Do you have wind flags? What caliber, bullet and speed are you Shooting? Matt

hello Matt
i have a 6.5 creedmoor shooting the sierra 1740, solid front rest with a 3" wide bench rest bag, and a rear bag, shooting approx 2750fps