Bullet imbalance - Page 2

1Hobie · April 3, 2012, 11:25 AM

"I've found that at 360,000 rpm at the muzzle, gyroscopic precession will cause a standard mean deviation of a dimensional factor of /\1.3 +- or so.
Harmonic influction can also induce a non-linear line of deviation from the norm."

You do realize that my statement was truly a load of bull excrement.

Just having a little fun at the poor OP's expense.

However , here's the real deal on computing bullet rpm:

http://bulletin.accurateshooter.com/...and-stability/

Regards,

Hobie

Rangefinder · April 3, 2012, 11:51 AM

Yup--I did

But it really did take me a minute after looking at it and saying to myself--"what the heck formula is he using???" It's what happens after I've had way too much on the mind for too long...

I appreciate a good smart @$$. LOL

1Hobie · April 3, 2012, 11:55 AM

Surprisingly, my WAG using what I just pulled out of thin air wasn't quite as crazy as I thought it to be. My 1-8 twist Sport can spin up a bullet to 270,000 rpm using 3000 fps muzzle velocity as a reference.

Wow!

Regards,

Hobie

Rangefinder · April 4, 2012, 12:25 AM

Know what you mean--if I push my 6mm Remi to it's max with 55gr. ballistic tips it's cranking 328,000 rpm's... So yah, a couple numbers in there weren't so far off as to be blatantly BS obvious...

Jim243 · April 4, 2012, 02:11 AM

And here I thought I was imbalanced, got to go and take some more Metamucil.

http://www.metamucil.com/index.php?u...02_e_metamucil

Jim

April 3, 2012, 11:51 AM	#27
Rangefinder Senior Member Join Date: August 4, 2005 Posts: 2,017	Yup--I did But it really did take me a minute after looking at it and saying to myself--"what the heck formula is he using???" It's what happens after I've had way too much on the mind for too long... I appreciate a good smart @$$. LOL __________________ "Why is is called Common Sense when it seems so few actually possess it?" Guns only have two enemies: Rust and Politicians.

April 4, 2012, 12:25 AM	#29
Rangefinder Senior Member Join Date: August 4, 2005 Posts: 2,017	Know what you mean--if I push my 6mm Remi to it's max with 55gr. ballistic tips it's cranking 328,000 rpm's... So yah, a couple numbers in there weren't so far off as to be blatantly BS obvious... __________________ "Why is is called Common Sense when it seems so few actually possess it?" Guns only have two enemies: Rust and Politicians.

April 4, 2012, 02:11 AM	#30
Jim243 Senior Member Join Date: January 5, 2009 Location: Just off Route 66 Posts: 5,067	And here I thought I was imbalanced, got to go and take some more Metamucil. http://www.metamucil.com/index.php?u...02_e_metamucil Jim __________________ Si vis pacem, para bellum

April 3, 2012, 11:25 AM	#26
1Hobie Senior Member Join Date: November 6, 2010 Location: west central Illinois Posts: 277	"I've found that at 360,000 rpm at the muzzle, gyroscopic precession will cause a standard mean deviation of a dimensional factor of /\1.3 +- or so. Harmonic influction can also induce a non-linear line of deviation from the norm." You do realize that my statement was truly a load of bull excrement. Just having a little fun at the poor OP's expense. However , here's the real deal on computing bullet rpm: http://bulletin.accurateshooter.com/...and-stability/ Regards, Hobie

April 3, 2012, 11:55 AM	#28
1Hobie Senior Member Join Date: November 6, 2010 Location: west central Illinois Posts: 277	Surprisingly, my WAG using what I just pulled out of thin air wasn't quite as crazy as I thought it to be. My 1-8 twist Sport can spin up a bullet to 270,000 rpm using 3000 fps muzzle velocity as a reference. Wow! Regards, Hobie