Long Range shots - elevation right on always to the right

[NVHunter1]

I am hoping some one out there can clear up a mystery for me. I have been shooting and reloading and have found a load that works real well in my 300 rum. I am using a Huskemaw scope and cant figure out how to correct my problem. I am zeroed at 200 yards, I move to 400 yards elevation is perfect and I am 4 inches to the right, 600 yards elevation is perfect and I am 6" to the right 800 yards elevation is perfect but I am 8" to the right. 1 MOA to the right no matter what distance. I thought my reticle might be off so I did the inverted T test, shot at 100 yards ok ran the scope up 50 clicks and the bullet was right above the 100 at the desired height, I was expecting that I would see it was going to be to the right but it was right on. I am at a loss on what to do next. Help!! I guess I could dial the windage 1 MOA to the right but then I will be 2" left at 200 yards.

PS all shots are from a fixed bench same setup for each distance.

Load is a 200 gr AB with 88 gr of H1000, Rem 9 1/2 primer. 3000FPS 1/2 Moa groups

[WildRose]

Originally Posted by NVHunter1

I am hoping some one out there can clear up a mystery for me. I have been shooting and reloading and have found a load that works real well in my 300 rum. I am using a Huskemaw scope and cant figure out how to correct my problem. I am zeroed at 200 yards, I move to 400 yards elevation is perfect and I am 4 inches to the right, 600 yards elevation is perfect and I am 6" to the right 800 yards elevation is perfect but I am 8" to the right. 1 MOA to the right no matter what distance. I thought my reticle might be off so I did the inverted T test, shot at 100 yards ok ran the scope up 50 clicks and the bullet was right above the 100 at the desired height, I was expecting that I would see it was going to be to the right but it was right on. I am at a loss on what to do next. Help!! I guess I could dial the windage 1 MOA to the right but then I will be 2" left at 200 yards.

PS all shots are from a fixed bench same setup for each distance.

Load is a 200 gr AB with 88 gr of H1000, Rem 9 1/2 primer. 3000FPS 1/2 Moa groups

I'd say go ahead and correct for your 400yd windage and get it dead on there.

Then bring it in to 100yds and see where you are.

If you're still dead on at 100, then something's fishy..

It almost makes me think your scope is mounted with a twist/yaw right to left.

[danj]

If you have a right hand twist barrel it could be spin drift. I add .75 moa left at 800 yrds on my 338 edge. Go look at the G-7 balistic program and it will calculate the adjustments you need.

[phorwath]

You've just discovered spin drift and Coriolis drift.

There are lots of historical Threads covering these topics. If you use the Search feature, you should find a day's or more reading material.

[Jim5351]

phorath had basicaly the same problem that he posted in Nov. 08 see Left @ 300 yds - Right @ 1000 yds? WTH?



here was my sugestion


Re: Left @ 300 yds - Right @ 1000 yds? WTH?
I don't know what bases you are using, solid or windage adjustable, but I had the same problem with my 300Win mag Leupold 4.5 x14LR with Leupold windage adjustable bases. If your scope is not in perfect alignment with your barrell for windage you will experience crossover. A lot of shooters, and shops for that matter, will mount a scope on windage adjustable bases, then adjust the windage using only the crosshair windage adjustment. It is very important to adjust the windage first by using the windage adjustment on the base, fine tune with the crosshair adjustment. It is very important to start with the crosshairs centered for windage. A very easy way to check this is to place a mirror against the objective of your scope, if you see two sets of windage crosshairs, the crosshairs are not centered. Bring the crosshairs back to zero and adjust windage first by adjusting the base adjustment. Hope this helps, it solved my problems



It looks like it solved his problem, most likely would solve yours

No more Left @ 300 yds - Right @ 1000 yds?
OK, finally had a cold, windless, Alaskan day today, which allowed me to shoot at 1000 yds in ideal conditions.

Problem was: My scope wasn't mounted exactly parallel to the receiver/barrel on my Tikka T3 7mm Rem Mag. It was pointed off towards the right.

[NVHunter1]

Thanks for the ideas guys, I am using Tally one piece rings so thier is no windage adjustments. I will try the mirror trick. I am sure I am going to practice all these long range shots and My elk will stand there at 100 yards beggin to get shot. I will keep you posted if I descover something

[davkrat]

Interesting about the windage bases. I have them on my .308 and my elevation is always fine but the horizontal zero seems to give me fits regularly. Thanks for the tip!