Long range target shooting

[Dr Ray]

I relatively inexperienced in the long range shooting but am very interested in such.
Will post some photos soon but what I want to ask is the following:
At what range as in distance does spin drift really start to affect the travel?
Ditto for the Coriolis effect??

My 300 Winchester magnum target rifle.

I’m now using the Hornady 208 grain ELD match bullets powered by 81 grains AR2225 (compressed load).
This load gives very little variation in fps.

 

[BRICKBURN]

.
At what range as in distance does spin drift really start to affect the travel?
Ditto for the Coriolis effect??

Depends where you are on this little rock. Start worrying at 1000 yards if you are trying to hit bulls eyes.

https://appliedballisticsllc.com/wp-content/uploads/2021/06/Gyroscopic-Drift-and-Coriolis-Effect.pdf

 

[Dr Ray]

Depends where you are on this little rock. Start worrying at 1000 yards if you are trying to hit bulls eyes.

https://appliedballisticsllc.com/wp-content/uploads/2021/06/Gyroscopic-Drift-and-Coriolis-Effect.pdf

1345m in tropical Australia
Latitude is around 17 degrees

 

[Dr Ray]

Depends where you are on this little rock. Start worrying at 1000 yards if you are trying to hit bulls eyes.

https://appliedballisticsllc.com/wp-content/uploads/2021/06/Gyroscopic-Drift-and-Coriolis-Effect.pdf

Many thanks
I actually searched for info but did not come up w that one
Really appreciated
Thank you
Ps I must outshoot my shooting buddy, (Wicked) Ron!
Joking of course

 

[BourbonTrail]

Spin drift is a small fixed amount based on rifling/range. Coriolis is more of a headache, but ballistics calculators can help as Brickburn pointed out. (Aiming towards the equator the bullet floats west, away it floats east, parallel impacts drop more).

Both are 3rd order things, so focus on wind and drop. Once you hit those two, focus on the others. They are usually on order of 2-4cm at 1000m IIRC.

If you are feeling extra nerdy on the subject, I recommend:

Modern Exterior Ballistics The Launch And Flight Dynamics Of Symmetric Projectiles 2nd Ed. R. Mc Coy​

 

[Dr Ray]

Spin drift is a small fixed amount based on rifling/range. Coriolis is more of a headache, but ballistics calculators can help as Brickburn pointed out. (Aiming at the equator the bullet floats west, away it floats east, parallel impacts drop more).

Both are 3rd order things, so focus on wind and drop. Once you hit those two, focus on the others. They are usually on order of 2-4cm at 1000m IIRC.

If you are feeling extra nerdy on the subject, I recommend:

Modern Exterior Ballistics The Launch And Flight Dynamics Of Symmetric Projectiles 2nd Ed. R. Mc Coy​

Wife says I’m an alien nerd
Believe me it’s not a compliment
Increasing volume and tone

Didn’t help when I said
Wait for it
I can’t figure out the algorithm to that
Went ballistic

 

[Dr Ray]

My 338 is on the far right
Sako 85 model
Stainless steel barrel

 

[BeeMaa]

Wife says I’m an alien nerd
Believe me it’s not a compliment
Increasing volume and tone

Didn’t help when I said
Wait for it
I can’t figure out the algorithm to that
Went ballistic

You are who you are.

“Be yourself, everyone else is taken.” Oscar Wilde

Best of luck in your long range pursuit.

 

[Bob Nelson 35Whelen]

Wife says I’m an alien nerd
Believe me it’s not a compliment
Increasing volume and tone

Didn’t help when I said
Wait for it
I can’t figure out the algorithm to that
Went ballistic

@Dr Ray
Women folk is a strange breed of cattle.
Bob

 

[Altitude sickness]

How much distance scope adjustment do you have with those rings. I usually run out of adjustment of the scope. Unless starting with a tilted base of some type.

 

[Dr Ray]

How much distance scope adjustment do you have with those rings. I usually run out of adjustment of the scope. Unless starting with a tilted base of some type.

Don’t know yet

 

[Altitude sickness]

If you run out of adjustment. It is easily remedied. Ad a simple and affordable 20 MOA pic rail.

 

[WAB]

If you run out of adjustment. It is easily remedied. Ad a simple and affordable 20 MOA pic rail.

View attachment 554150

And then when you run out of adjustment you start walking grid lines.

 

[mark-hunter]

Simple calc.
Check specks of your scope, and vertical field of view.
If, for example, field of view is 50 moa, this means that 25 moa is up, and 25 moa is down.
So, you can use 20 moa piccatiny rail.
In that case after installation, this will be theoretical 5 moa for adjustement up and 45 moa to adjust for bullet drop. And you can zero the scope on 100.meters, as starting set up.

 

[Dr Ray]

Simple calc.
Check specks of your scope, and vertical field of view.
If, for example, field of view is 50 moa, this means that 25 moa is up, and 25 moa is down.
So, you can use 20 moa piccatiny rail.
In that case after installation, this will be theoretical 5 moa for adjustement up and 45 moa to adjust for bullet drop. And you can zero the scope on 100.meters, as starting set up.

I have a nightforce 12-42x50 scope

 

[TMac]

I have a nightforce 12-42x50 scope

Those are generally good rugged scopes and holding up to the constant dialing very well. They tend to be calibrated accurately too so one can rely on the moa/mil input. Have fun.