Great Article on Calculating Yaw of Repose & Spin Drift

[THEIS]

Hello,

From the brilliant minds of James Boatright and Gus Ruiz.

https://dl.dropboxusercontent.com/u...Calculating_Yaw_of_Repose_Spin_Drift_FULL.pdf

And this is why I keep saying that going heavier and bigger diameter projectiles is not the direction the ELR world should be going. We should be going to better designed projectiles that can increase our projectile weight but not increase projectile diameter and/or length. A faster BUT "heavy" for caliber 338 projectile has better attributes than a "heavy" for caliber 375, 416, 420, etc etc.

SPEED and Projectile design is the KEY..barrels are meant to be replaced
You don't have a Keith Black Hemi built worrying about replacing tires lol

Thanks,
THEIS

 

[hubel458]

We are doing a case that will get heavy 416 bullets

faster than any 338 can get heavy 338 bullets,

should keep up..Ed

 

[THEIS]

Hello,

Because there is a native language and age barrier.....
Are you saying I should keep up or your case should be able to keep up?

THEIS

 

[LastShot300]

Hello,

From the brilliant minds of James Boatright and Gus Ruiz.

https://dl.dropboxusercontent.com/u...Calculating_Yaw_of_Repose_Spin_Drift_FULL.pdf

And this is why I keep saying that going heavier and bigger diameter projectiles is not the direction the ELR world should be going. We should be going to better designed projectiles that can increase our projectile weight but not increase projectile diameter and/or length. A faster BUT "heavy" for caliber 338 projectile has better attributes than a "heavy" for caliber 375, 416, 420, etc etc.

SPEED and Projectile design is the KEY..barrels are meant to be replaced
You don't have a Keith Black Hemi built worrying about replacing tires lol

Thanks,
THEIS

Theis, thanks a lot for sharing. The paper raised a lot of "what if" questions and put to rest some bad information we usually take for granted such as the Litz formulas.

It's a great thing to have such bright minds working on advancind the state of art in ballistics.

 

[Danehunter]

Some of the new highly VLD monolithic bullets turned on CNC machines are showing great BC numbers and far less wind deflection so THEIS is correct on his take on aerodynamics being an important part of the answer.

As well these new bullets, having very long ogives, the superior aerodynamics means they are able to be pushed faster without loss of accuracy that sometimes occurs with "lesser" bullets.

So TOF is faster with these new "super bullets" therefore wind has less time to affect horizontal dispersion.

BUT these bullets will not fit into even the longest standard magazines built for, say, 6.5 CM or .338 LM so they must be manually loaded.

Eric B.

 

[gohring3006]

We are doing a case that will get heavy 416 bullets

faster than any 338 can get heavy 338 bullets,

should keep up..Ed

Have you ran a theoretical ballistic solution with a heavy 338 bullet in your big case?

 

[THEIS]

It's a great thing to have such bright minds working on advancing the state of art in ballistics.

Hello LS300,

The ballistics bulb does not get much brighter and more efficient than Gus Ruiz!! lightbulb

Thanks,
THEIS