Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Hunting > Long Range Hunting & Shooting

Long Range Hunting & Shooting Nightforce Optics


Reply

spin drift & Coriolis effect

 
LinkBack Thread Tools Display Modes
  #36  
Old 03-29-2011, 07:21 PM
Silver Member
 
Join Date: Jan 2010
Location: utah
Posts: 366
Re: spin drift & Coriolis effect

Quote:
Originally Posted by Bravo 4 View Post
At least a couple times a year we shoot our .50's out to a little over 1600 meters, the same mile as your 1760 yards. As a matter of fact that's what we have scheduled this weekend.
When talking about the effects on REALLY long range shooting I believe that I have some pretty knowledgeable resources on the subject. I not only asked our Mortar Platoon SGT (a 20 year 11C), but also five 11C instructors(all MLOC grads, with close to 100 years combined experience).They all said the same thing, you cannot accurately account for Coriolis without a Mortar Ballistic Computer and input the gun's coordinates, the target's coordinates and factor in the bearing from gun to target. You cannot just say it will always land to the right. And these guys shoot out to 7200 meters. I also have a few buddies that are instructors at the Sniper School and they will say the same thing I was told going through the school, you cannot just range a target and put a number on it...you can't just favor/adjust right and call it good.
Now then, the one common factor these guys have in common is they are all Army trained. That could be the down fall of my/their experience...but I doubt it. It if was that easy I bet we would be using it.
As for the 3" right spin drift and 3" right of Coriolis at 1000 yards. I would be willing to say that it's really 6" of spin drift. Looking at the data book for our .50's shooting the MK211 rounds, it shows a .5 MOA of spin drift @ 1000 (also what I use for my .338 Edge). For our M24's most guys I know use .75-1 MOA.
look all i did was give the answer for the equation (derived from ballistics fte)for 45 degrees lat. at that lat it gets you close enouph from southern arizona to northern idaho. i listed how to quickly vector for east/west asimuth. again i did not say it was perfect but i did say close enouph. if you go closer to equator or to the north pole (notice my comment about alaska)the numbers change and will need new calcs. but for a majority of people in the us these simple numbers work. i did not mention #s for spin drift.
Reply With Quote
  #37  
Old 03-30-2011, 09:38 AM
Silver Member
 
Join Date: Jul 2009
Posts: 388
Re: spin drift & Coriolis effect

Tag. I love this stuff.
__________________
Laus Deo
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: spin drift & Coriolis effect
Thread Thread Starter Forum Replies Last Post
Can't find my spin drift or coriolis. lisagrantb Long Range Hunting & Shooting 21 04-02-2011 01:22 PM
A new spin drift and coriolis question (I think) Exbal jmason Rifles, Bullets, Barrels and Ballistics 15 12-13-2010 07:11 PM
Coriolis Effect Questions justgoto Long Range Hunting & Shooting 17 08-03-2010 12:37 AM
Coriolis effect Blaine Fields Rifles, Bullets, Barrels and Ballistics 46 03-17-2007 01:22 AM
Magnus Effect vs. Spin Effect Brent Rifles, Bullets, Barrels and Ballistics 2 12-26-2002 05:27 PM

Current Poll
Do you plan to buy a new custom rifle in the next 12 months?
YES - Of course - 73.10%
1,549 Vote
NO - wife/girlfriend won't let me. - 26.90%
570 Votes
Total Votes: 2,119
You may not vote on this poll.

All times are GMT -5. The time now is 08:15 PM.


Powered by vBulletin ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2014 Long Range Hunting, LLC