Uh Oh: Shots Getting Higher at Long Distance with VX5HD

[Fire_9]

If I read your OP correctly, your are 3+ moa off at 750 yards. Assuming your MV measurement is close to accurate, you either input incorrect distance or have a significant scope issue, are the most likely issues. Baro pressure, elevation, blah, blah, blah aren’t gonna cause a 24” error at 750 yards. Wind can, but you say wind was less than 2 mph and your impacts were high. Check your scope tracking and put a different scope on this rifle and shoot at distance.

100% correct. I was off on my post above and after running some numbers, pressure by itself could not cause that much deviation. Is definitely a contributing factor but not the only factor.

 

[mxgsfmdpx]

Are you off at 300? 400? 500? It’s a huge stretch to go from 100 to 750 and immediately fault the optic. More information needed.

 

[General RE LEE]

One thing to consider is "target jump" especially during hot summer weather. You can watch it in your scope, the mirage changes where you think the bullseye is and it is usually higher and so your already aiming above your target. I've set up and looked thru my scope and watched the target dance in hot weather and that's when I call it a day, just burning ammo at that point. I usually shoot from daybreak until about 9 at the latest in the summer months to avoid this.

How much MOA can it be high?

 

[Overdrive]

How much MOA can it be high?

I honestly don't know, sorry not much help with that. There's plenty of variables.

I remember this info from a conversation I had with John Porter from BOTW. I was setting up my first Huskemaw scope and the custom turret they built and when I went out shooting with it on the first day I was hitting 12" high at 600 and thought they built the turret wrong or somehow I screwed up the data collection process. But after talking with him and taking his advice it all clicked and I understood more about what he was telling me. The turret was fine and I learned more about shooting in mirage and negative effects it can have, especially for sighting in.

 

[SomeJackassOnAForum]

Posting this thread without doing a tall turret test at 50 or 100 yds is pointless. You have no idea whether it's your data or the scope, and neither does anyone else.

 

[General RE LEE]

Posting this thread without doing a tall turret test at 50 or 100 yds is pointless. You have no idea whether it's your data or the scope, and neither does anyone else.

I’ll be doing test this weekend. Going to be close to 100 degrees though so will need ice water and towels to cool bore.

 

[Pronghunter]

If you're looking to check tracking, you should be static mounting the optic and checking on a calibrated sheet. When you static mount, you can check every single adjustment throughout the scope's available travel. I've seen scopes with dead spots and/or scopes that over/under adjust for only a portion of the travel. You can also see if the reticle is canted. For me, I want a scope that tracks within 2%, and depending on what I paid, less than 1% error. You won't see that level of resolution live firing.

^^^^^. This. ^^^

All of the “testing” you are doing or will do just introduce other variables. Take all that out of the equation. Follow the above info and be done.

 

[SomeJackassOnAForum]

He's talking about a 15-20% error, not under 2%. It'll show up when shooting unless he's really, really bad at shooting.

The turret movement test is a great way to test this as well, but requires the ability to aim the rifle at a reference point without disturbing the rifle and to then measure it. Harder to do with the scope mounted.

 

[General RE LEE]

Better day today. I started shooting early in the morning where the temps were in the 70s. Tracking was good at 500, 600 and 750. I started to hit higher at 1K and 1250 yards. When I was shooting 1K and 1250, I was using towels out of an ice bucket to cool bore but there was heat and mirage showing up. I have some scope tracking targets coming in the mail I will use to verify if the scope is tracking properly across its range.

For hunting purposes this VX5HD 3-15x44 with the Wind Plex reticle will do fine. I love always like the glass, forgiving eye box large FOV and low light performance of the VX5/VX6HDs.

100 yards

 

[General RE LEE]

500 yards

 

[General RE LEE]

600 yards

 

[General RE LEE]

750 yards

 

[General RE LEE]

3 shot group about 16 inches high at 1250 yards

 

[Gunnersdad49]

My first thought is the scope over bore measurement you input may not be accurate. Try to measure that as closely as you can.

 

[General RE LEE]

My first thought is the scope over bore measurement you input may not be accurate. Try to measure that as closely as you can.

Yes sir I did that last night with a pair of calipers. I was originally using 1.5 the other day but it’s actually 1.93 on my Sendero.

 

[PredatorSlayer]

500 yards

Where state are you located in?

 

[General RE LEE]

Where state are you located in?

Tennessee

 

[PredatorSlayer]

Tennessee

Looked like Strategic Edge . I am also a member there…

 

[General RE LEE]

Looked like Strategic Edge . I am also a member there…

Yes sir it is! I’m down there quite a bit. Black Nissan Frontier truck. Lately I’ve been there with my rebarreled Rem 700 Sendero 7mm STW with Leupold VX5HD.

 

[PredatorSlayer]

Yes sir it is! I’m down there quite a bit. Black Nissan Frontier truck. Lately I’ve been there with my rebarreled Rem 700 Sendero 7mm STW with Leupold VX5HD.

I am also down there quite a bit - its one of my happy places. Dark blue 2020 cummins, I’ll look for you