Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Hunting > Extreme Long Range Hunting & Shooting (ELR)

Extreme Long Range Hunting & Shooting (ELR) Over 1,000 Yds.


Reply

Spin drift and Coriolis at 1000+

 
LinkBack Thread Tools Search this Thread Display Modes
  #1  
Old 10-08-2012, 09:04 AM
Bronze Member
 
Join Date: Feb 2009
Location: Boise, ID
Posts: 49
Spin drift and Coriolis at 1000+

Assuming most of us are shooting in the northern hemisphere and using right hand twist barrels, how do you guys account for the above? From my research, I'm seeing anywhere from a .5 to 1.25 MOA drift right at 1000 yards. If you zero for say 300, do you add some left MOA to account for the longer ranges knowing the being an inch or two to the left at 300 probably isn't going to change much.

I'm about to pick up my new custom 338 Norma Mag and was just curious about the effects of spin and coriolis at 1000-1500 yards. Thanks for your widsom.
__________________
Scott

.338 Norma Mag, Stiller Tac338 & Rock Creek barrel
Reply With Quote
  #2  
Old 10-08-2012, 09:17 AM
Platinum Member
 
Join Date: Feb 2007
Location: Townsend, Montana.
Posts: 7,900
Re: Spin drift and Coriolis at 1000+

I use "Shooter" and now also Bryan Litz new Applied Ballistics programs on my Droid phone. Both of these programs will give you corrections for spin drift and corriolis tuned to your rifles ballistics and from your shooting location.

I leave SD checked on as part of every shooting solution. But I only employ the coriolis to be part of shots beyond 1200 yards as the effects are usually small before that.
Jeff
__________________
Reply With Quote
  #3  
Old 10-08-2012, 09:21 AM
Bronze Member
 
Join Date: Feb 2009
Location: Boise, ID
Posts: 49
Re: Spin drift and Coriolis at 1000+

Cool. I've heard of shooter. Is Bryan's program available from the google play store for droids?
__________________
Scott

.338 Norma Mag, Stiller Tac338 & Rock Creek barrel
Reply With Quote
  #4  
Old 10-08-2012, 09:23 AM
Platinum Member
 
Join Date: Feb 2007
Location: Townsend, Montana.
Posts: 7,900
Re: Spin drift and Coriolis at 1000+

Quote:
Originally Posted by sdowney View Post
Is Bryan's program available from the google play store for droids?

I purchased mine from his Applied Ballistics site, and it is the most advanced program I have found to use.

Jeff
__________________
Reply With Quote
  #5  
Old 10-08-2012, 09:29 AM
Bronze Member
 
Join Date: Feb 2009
Location: Boise, ID
Posts: 49
Re: Spin drift and Coriolis at 1000+

I feel honored to have such a LR master answer my questions. One last: what is your gut feel for my .338 norma shooting a 300 gr OTM at 1000? Would you guess 6"? 10"? 15"

Scott
__________________
Scott

.338 Norma Mag, Stiller Tac338 & Rock Creek barrel
Reply With Quote
  #6  
Old 10-08-2012, 09:33 AM
Platinum Member
 
Join Date: Feb 2007
Location: Townsend, Montana.
Posts: 7,900
Re: Spin drift and Coriolis at 1000+

Quote:
Originally Posted by sdowney View Post
I feel honored to have such a LR master answer my questions. One last: what is your gut feel for my .338 norma shooting a 300 gr OTM at 1000? Would you guess 6"? 10"? 15"

Scott
Scott I would not go that far. I just shoot a lot and like talkin shooting and hunting.

Not sure I understand the question. Are you asking about the spin drift effect?

Jeff
__________________
Reply With Quote
  #7  
Old 10-08-2012, 09:39 AM
Bronze Member
 
Join Date: Feb 2009
Location: Boise, ID
Posts: 49
Re: Spin drift and Coriolis at 1000+

My bad. How much will my bullet move right at 1000 yards for my .338 NM (adding SD and corioilis)? Just your gut feel.

And, you are one of the most revered guys on this site. Thanks for all your inputs and knowledge sharing. Lots of time on your part. Not unappreciated!!
__________________
Scott

.338 Norma Mag, Stiller Tac338 & Rock Creek barrel
Reply With Quote
Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes


Similar Threads for: Spin drift and Coriolis at 1000+
Thread Thread Starter Forum Replies Last Post
spin drift & Coriolis effect rem Long Range Hunting & Shooting 41 05-19-2014 11:34 AM
Spin drift and Coriolis??? jrw1976 Rifles, Bullets, Barrels and Ballistics 6 03-27-2012 02:20 PM
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
Spin drift 308175 Rifles, Bullets, Barrels and Ballistics 5 05-16-2003 01:09 PM


All times are GMT -5. The time now is 02:39 PM.


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