Ballistics charts

[Mthomas90]

Using a couple different ballistics calculator to what adjustment actually need is off by a little over 1moa. I have checked and everything is entered like it should be.
Any suggestions as to what could be throwing it off?

Thanks

[WinnieTheBoom]

Which program are you using? I've used Ballstic AE and Bullet Flight with good success... Windage and elevation adjustments were within a 1+/- clicks of each other on both with the same data.

[Mthomas90]

Hornady and then I have strelok on my phone.

[earl39]

Altitude, barometric pressure, humidity are the first three that come to mind.

[LongRange]

What earl said and temperature...also use the G7 BC numbers...i use ballistics AE and shooter...ballistics AE is a little better and once you take it out in the field and true it up its dead on.
Have you shot through a chronograph and know your FPS?

[Mthomas90]

I have been using G1 and yes I know my fps.
I had this exact same thing with my 243 also.

[LongRange]

Also might want to try jbm and gun works G7 programs if you using your PC.

[LongRange]

Change the G1 BC and see what happens.

[js223]

When you say it's off by a little over 1MOA, are you going by clicks? Your scope's actual adjustments could be different than stated.

[Mthomas90]

It's an moa swfa scope.
Running it with g7 bc gives the same drop.

[stomp442]

Double check your scope height. I find that is the most over looked variable. That being said, being within a minute isn't to bad and truth be told I only use a ballistic program to get me close then fine tune and keep a log of what I actually have to dial to for any given range from my 200 yard zero. Ballistic calcs are nice but I would never trust one to actually hunt game or shoot a match with without spending the range time to verify actual drops.

[Mthomas90]

Changing the scope height got it to within 1moa, with it off .25" it made it off 3moa at the distance I was shooting.
I guess I have just been lucky in the past with other guns being almost perfect.
Thanks for all the help!

[yobuck]

There is no such thing as (thee) perfect chart. Assuming you always shoot the same location,
and the conditions are constant, then you can expect very similar results. Uphill/downhill is also
a factor which is often ignored. And the fact is most shooters wont be keeping their shots within
a minit of angle at 1000 yds. Especially when shooting at animals.

[eddiesindian]

Amazing what 1/4" can equate to a?..........

[thatguyshm]

I know its very old school, but this seems to work to get you really close. Its an old book but its all science. Gets you awfully close.

http://www.amazon.com/Tables-Bullet-Performance-Philip-Mannes/dp/0935632050

[pitsnipe]

Mthomas90,

Not enough information to give you a moderately accurate answer. Is your 1MOA "off" in windage or elevation? Do you know what your adjusted MV is for the ammo temperature? What calculator/program are you using? With ballistics, a little garbage in WILL make a big difference in garbage out over 600 yards. In my opinion, calculators are worth their metal (all other factors considered like you are reading the wind correctly) at 800 yards plus.



Snipe

[Mthomas90]

Mthomas90,

Not enough information to give you a moderately accurate answer. Is your 1MOA "off" in windage or elevation? Do you know what your adjusted MV is for the ammo temperature? What calculator/program are you using? With ballistics, a little garbage in WILL make a big difference in garbage out over 600 yards. In my opinion, calculators are worth their metal (all other factors considered like you are reading the wind correctly) at 800 yards plus.



Snipe
1moa off in elevation at 600 yards.
My mv was taking with the temp within a few degrees of what I was inputting and shooting at.
I was using hornady ballistic calculator and strelok. They both come up with almost identical adjustments. I suppose within 1moa is ok. I failed to change the scope height when I first ran it, it was 3moa with the default scope height.

I am just an amateur at all this [emoji1]

[yobuck]

1moa off in elevation at 600 yards.
My mv was taking with the temp within a few degrees of what I was inputting and shooting at.
I was using hornady ballistic calculator and strelok. They both come up with almost identical adjustments. I suppose within 1moa is ok. I failed to change the scope height when I first ran it, it was 3moa with the default scope height.

I am just an amateur at all this [emoji1]

Are you a hunter or is your interest strictly for target shooting?

[Mthomas90]

Are you a hunter or is your interest strictly for target shooting?
Both

[yobuck]

Both

How far are you from Garden City?