Well crap, I thought I knew everything.

[BlackdogGS]

After all my years of shooting I never considered the Coriolis effect. Even though most of us don't shoot at 1,000 yards its still very interesting and good to know. Watch the vid.

Precision Long Range Shooting & the Coriolis Effect

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[TapRackNGo]

look up "Sniper 101" on youtube. TiborasaurusRex. Excellent series.

 

[PaulB47]

Coriolis effect has two components. That article mentioned only one.

If you are on the equator shooting E or W, only one component is present, and your bullet will hit high or low. If you are on the N pole shooting S (can't help but do that, heh) only the other component is present, and your bullets will hit to the right (at the S pole it would hit to the left). Shooting anywhere else, in any direction, both components will be present.

The way I look at it is this... Imagine you are shooting at a bullet hole in the target, and through that hole you see a star. You are actually shooting at that star. In the time it takes the bullet to get to the target, it is still headed toward that star, but in the meantime the earth has rotated and the star can no longer be seen through that bullet hole. The bullet strikes a different place on the target. (This picture ignores any other motion such as Earth rotating around the sun, sun around the galaxy, etc.) Or one could just say, you are shooting at a moving target without compensating for the movement.

I once put Art Pejsa'a ballistics equations in a spreadsheet as a calculator, so I'm kinda familiar with it by now.

 

[Certaindeaf]

There's an app for that.

 

[ditchtiger]

Didn't John Browning made the 1911 with a left hand twist when the standard was right?

 

[Certaindeaf]

Didn't John Browning made the 1911 with a left hand twist when the standard was right?

The Coriolis affect doesn't matter at seven yards.

 

[ditchtiger]

I know that, just trivia.

 

[ditchtiger]

The Coriolis affect doesn't matter at seven yards.

7 yards? I regularly lob them out to 200 just for practice and giggles.

 

[edslhead]

Dont forget to factor in the gravitational pull of the moon and sun. Very important

 

[ditchtiger]

Dont forget to factor in the gravitational pull of the moon and sun. Very important

Shooting on leap day, Feb. 29th. really screws thing up.

 

[Member 5605]

I think many overlook spindrift as well.

 

[BlackdogGS]

This explains why I can't hit the broad side of a barn.

 

[jbett98]

If you're shooting along the equator, what happens there?

 

[PiratePast40]

This explains why I can't hit the broad side of a barn.

I'm with ya on that one!

 

[Certaindeaf]

If you're shooting along the equator, what happens there?

There's the very real possibility of you shooting yourself in the back of the head.. happens all the time in Columbia.

 

[HB of CJ]

We got to tour the battleship USS Massachusetts way back in 1981. One of the things that I still remember like yesterday was the HUGE mechanical fire control computer located in the armored command center way down in the guts of the ship.

The nice cute teen aged tour guide told us how many different variables affected the sometimes 60 second flight time of the huge 2000+ pound battleship shells. When everything worked correctly all 9 rounds would hit inside a football field .... at 15 miles!

Just about anything and everything could and did affect the shooting. North of the Equator. South of the Equator. At the Equator. Shooting East or West. High altitude cross winds. Hot bore. The enemy jiving and jinksing. Powder. Etc.. PURE LUCK! Amazing.

 

[thorborg]

I keep the tide tables and farmers almanac in my pocket when nat'sass accuracy is needed
sometimes you need a little extra shim stock for elevation

 

[clearconscience]

I just close my eyes and let Jesus take the bullet.

 

[Certaindeaf]

 

[No_Regerts]

I just close my eyes and let Jesus take the bullet.

He already died for your sins, now he's gonna take your bullet? Hope you're tithing!