Am I dialing in MOA right?

[Boomer]

A few observations:

Near wind is a greater concern to the long range marksman than far wind.

Provided you are sighted in and shooting at a similar elevation, atmospheric pressure variations will not take you off paper.

Use your computer generated drop tables as a guide line, not as gospel, create data pertinent to your loads in your rifle, by actual shooting in 100 yard increments, then once you have a basic table worked out, you can add to it by shooting at 100 yard increments beginning at 50 yards or 25 yards.

Calculating the drop at 1000 from feet or inches will make your head hurt. I've found it simpler to use come-ups from a 100 yard zero in full minutes rather than clicks, thus if I needed to have a bullet impact 24" high at 100 to be on at 1000, I just need to add 24 minutes, and worry about the quarter minute adjustment to fine tune the POI. Your ammo might not be accurate enough to take a quarter minute into account.

Ensure that your scope is tracking properly (accurately and repeatedly) particularly near the limits of the adjustment.

 

[fatrack]

I'm pretty new to this long range thing but woundn't a raised scope base help you get more up out of your scope? My 338 ultra has a 20moa base on it.

 

[logan1080]

I'm pretty new to this long range thing but woundn't a raised scope base help you get more up out of your scope? My 338 ultra has a 20moa base on it.

Yeah it probably would. Just read another thread of a guy shooting 1025 yards and used isnipe and landed his first shot. WTF is wrong with my isnipe program that cant get me close at all. About the wind, my calculator factors in both wind and muzzle and wind at target. I measured both and input both and my windage adjustments were fairly accurate. Never had any work done to scope and turrets say 1/4 moa.

 

[icedragonmx]

Took my browning .300 wsm shooting 180 winchesters out today to take a crack at a target out at 1000 yards. I put 2 shots through a chrono and got a velocity of 3060 fps averaged. I went to the target and took atmosphere readings and wind readings using my weathermate from speedtech, then went 1000 yards away and took readings of wind again. I was shooting flat, no slope. I punched all that info along with all my bullet info into my ipod app called Isnipe and I also tried Ballistic app. Using G1 ballistics it said to dial in 21.53 MOA for drop. So that would be 81 clicks approx right? I am using a leupold VX 3 6.5-20 LR scope with 1/4 MOA clicks. so I dial up the scope and shoot and it lands about 6.5 MOA low according to scope redicle. So I dial in 6.5 more MOA and the impact point does not change. By the time I got it so my drop was dialed in I had dialed up 49 MOA or 196 clicks. So I checked out G7 ballistics and double checked my atmosphere readings. G7 said to only dial up 16.53 MOA yet I had to dial my scope to the maximum of 49 MOA. Specs on the scope say I should be able to dial 94 MOA???? I am new to the long range shooting so I don't understand why I could only get 49 MOA out of scope and why I had to dial so much higher than what the Ballistics of Isnipe and Ballistic told me to dial. Anyone know what I am doing wrong?

Couple of questions-21.53 moa= 86 clicks on a 1/4moa click scope? 1 click =.25" at 100 yards and 2.5" at 1000 yards
"lands about 6.5 MOA low according to scope redicle"- is that at the magnification that the mil dots are set at(mine read at 12x) I have a Bushnell 4200 6x24x50 Tactical.

Just a comment on the total moa travel of a scope. Mine is advertised at 50moa. With a 20 moa base I have 46 moa of up movement to play with. Without the base that would be 26 moa of up and 22 down(not a full 50)

Isnipe is a good program so something else is not working as it should be. The scope height is programed right? The clicks are for sure 1/4 and not 1/8(tested at the range?) Regardless of whats marked Wish I had a easy answer but maybe something is missed in the setting? Check it all out and then set up a BIG target at 1000 yards. Mine was 4'x8' and I just landed my first group on the cardboard Wind can do quite a bit at that range. Moved my hits 30"-45" to the right etc. Wish I could help more.

 

[Ganderite]

I have made many of the possible mistakes and had most of the bad experiences.

based on my experience, the problem could be that the reticle stops moving long before the knob does.

Install a bore scope and start crnking up the sight. You might find it stops moving at around your original elevation so that the next time you cranked on 6 minutes, nothing was really happening.

At 100 yards, your scope might have 25 minutes of UP and 45 minutes of DOWN. You might need a ramped scope base.

 

[logan1080]

Yeah one thing I did forget to consider is that my reticle does NOT enlarge as I zoom. So 6 minutes at 1000 yards would not be correct, it should be less than 6 MOA which would mean its even further out. Never measured to make sure it was a true 1/4 MOA scope but when sighting in the scope it adjusts accurately when I adjust it 1 moa. I may have to get 20 moa bases. I should set up paper targets out to 500 yards and see if my scope adjusts correctly.