280 AI Ballistics: I need help, I am Confused

[rodneymoncrief]

I have a H S Precision SPL chamber in 280 AI with a Leupold VX6 3-18x44 scope I have worked up a very accurate load 150gr H ELD-X, 59.0gr IMR 4831, Fed. 210M, and Nosler Brass. Velocity has been verified with an Oehler at 3096fps and a LabRadar at 3114fps It's zeroed at 200 yards, dial up 300 yards right on, 400 yards .5MOA high, 500 yards .75MOA high, and 645 yards 1.55MOA high. Dial up was calculated by G7 rangefinder and verified with BulletFlight app., where am I going wrong with my dial up? When I use G7 trajectory verification software it's showing that my muzzle velocity is approx. 200fps faster than my range finder/app.

 

[elkaholic]

I have a H S Precision SPL chamber in 280 AI with a Leupold VX6 3-18x44 scope I have worked up a very accurate load 150gr H ELD-X, 59.0gr IMR 4831, Fed. 210M, and Nosler Brass. Velocity has been verified with an Oehler at 3096fps and a LabRadar at 3114fps It's zeroed at 200 yards, dial up 300 yards right on, 400 yards .5MOA high, 500 yards .75MOA high, and 645 yards 1.55MOA high. Dial up was calculated by G7 rangefinder and verified with BulletFlight app., where am I going wrong with my dial up? When I use G7 trajectory verification software it's showing that my muzzle velocity is approx. 200fps faster than my range finder/app.

Have you calibrated your scope?

 

[rodneymoncrief]

Have you calibrated your scope?

I am using original turrets dialing up in MOA not BDC, I have my G7 rangefinder set up that way.

 

[257Tony]

Looks like your scope is not quite exactly .25 MOA per click, which is not uncommon. Not sure about your rangefinder, but many ballistics apps have settings where you can adjust this.

 

[rodneymoncrief]

Looks like your scope is not quite exactly .25 MOA per click, which is not uncommon. Not sure about your rangefinder, but many ballistics apps have settings where you can adjust this.

Which ballistic app should I use to correct for scope imperfections

 

[jd5521]

Are you using a custom cds turret or the original that came on the scope?

 

[Unoboats]

Did you put in your scope height from bore??

 

[rodneymoncrief]

Are you using a custom cds turret or the original that came on the scope
Factory turrets using G7 range finder and BulletFlight app for verification

Did you put in your scope height from bore??

Did you put in your scope height from bore??

Yes I'm using high rings so I'm using 1.8 inches

 

[rodneymoncrief]

Did you put in your scope height from bore??

Yes 1.8 inches with high rings

 

[rodneymoncrief]

yes

 

[dok7mm]

Do a tall target test to find if your scope clicks are accurate.

 

[257Tony]

Which ballistic app should I use to correct for scope imperfections

Strelok pro can do it, I'm sure there are others also.

 

[jd5521]

Of your consistently getting these numbers after a few outings I would call Leupold and tell them what's going on. They will tell you if your dell Irma is within their scope of acceptability or they will ask you to send them the scope to fix it. I'd lean towards the latter happening.

 

[Snowboy]

I have a H S Precision SPL chamber in 280 AI with a Leupold VX6 3-18x44 scope I have worked up a very accurate load 150gr H ELD-X, 59.0gr IMR 4831, Fed. 210M, and Nosler Brass. Velocity has been verified with an Oehler at 3096fps and a LabRadar at 3114fps It's zeroed at 200 yards, dial up 300 yards right on, 400 yards .5MOA high, 500 yards .75MOA high, and 645 yards 1.55MOA high. Dial up was calculated by G7 rangefinder and verified with BulletFlight app., where am I going wrong with my dial up? When I use G7 trajectory verification software it's showing that my muzzle velocity is approx. 200fps faster than my range finder/app.

Your scope rings may be higher than you think. How low is it at 100 yards?