Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Rifles, Bullets, Barrels and Ballistics


Reply

Heavy bullets vs.light bullets

 
LinkBack Thread Tools Display Modes
  #15  
Old 05-25-2012, 11:59 PM
Platinum Member
 
Join Date: Dec 2005
Posts: 2,114
Re: Heavy bullets vs.light bullets

Quote:
Originally Posted by Mikecr View Post
So provided BCs are valid at velocity, lower BC bullets ALWAYS drift more with a given wind than higher BC bullets, regardless of velocities.
Here's an example of the opposite happening as calculated by Berger Bullets' software:

Sierra 200-gr. HPMK, BC=.560, leaving at 2000 fps, 10 mph crosswind, at 1000 yards drift = 119 inches

Sierra 155-gr. HPMK, BC=.470, leaving at 3000 fps, 10 mph crosswind, at 1000 yards drift = 91 inches

Lower BC bullet leaving faster drifts less with a given wind than the higher BC bullet leaving slower.
Reply With Quote

  #16  
Old 05-26-2012, 12:57 AM
Silver Member
 
Join Date: Jul 2011
Location: Nebraska for now...
Posts: 218
Re: Heavy bullets vs.light bullets

There is an old saying that "speed kills". I believe it was the .220 swift the military tested for penetration, and since it was breaking 4000 fps, or hypersonic, it was out penetrating a 300 win mag. Really unless you get to very extended ranges, light and fast is just fine. On coyotes, inside of 400, I'd go light and fast. I grew up shooting a 700 .270 with a 90 gr hollowpoint at 3600 fps. I never seen any disadvantage, but i never got over 400 yards either. Some people think BC is everything, but really it's a non-issue inside of extended range. BC won't shoot any more accurately either it just bucks the wind and delivers a more linear flight path at extended range(past 600 yards).
Nimrod
__________________
"If God didn't want you to shoot a deer, he wouldn't have put a white target under their chins..." -Dad to a non-hunting preacher.
Reply With Quote
  #17  
Old 05-26-2012, 10:14 AM
Platinum Member
 
Join Date: Aug 2003
Location: NC, oceanfront
Posts: 3,301
Re: Heavy bullets vs.light bullets

Then I'm wrong Bart. Thanks for pointing it out.
I need to go back & better understand it.
Reply With Quote
  #18  
Old 05-26-2012, 11:27 AM
Edd Edd is online now
Platinum Member
 
Join Date: Jan 2011
Location: Tulsa
Posts: 1,103
Re: Heavy bullets vs.light bullets

The reason velocity can trump BC is because of the decreased time it takes the bullet to reach the target.
Reply With Quote
  #19  
Old 05-26-2012, 12:25 PM
Platinum Member
 
Join Date: Dec 2005
Posts: 2,114
Re: Heavy bullets vs.light bullets

Quote:
Originally Posted by Edd View Post
The reason velocity can trump BC is because of the decreased time it takes the bullet to reach the target.
With both bullets having the same time of flight to the 1000 yard target and 10 mph cross wind, the heavier one with a higher BC drifts less.

Sierra 155-gr. HPMK, BC=.470, leaving at 3000 fps, 1.5145 second TOF, at 1000 yards drift = 90.6 inches

Sierra 200-gr. HPMK, BC=.560, leaving at 2807.2 fps, 1.5145 second TOF, at 1000 yards drift = 78.5 inches

For the 200 grain one to have the same drift as the 155:

Sierra 200-gr. HPMK, BC=.560, leaving at 2545 fps, 1.6933 second TOF, at 1000 yards drift = 90.6 inches

As long as the 200 has a time of flight less than .1788 seconds longer than the 155 leaving at 3000 fps, it'll drift less.
That is, if my math's right. I don't do these things too well any more.

Last edited by Bart B; 05-26-2012 at 01:19 PM.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: Heavy bullets vs.light bullets
Thread Thread Starter Forum Replies Last Post
**HELP** Need to understand trajectory(heavy VS light) in bullets. Popapi Long Range Hunting & Shooting 28 12-20-2010 04:13 PM
.243AI Light Versus Heavy Bullets? TORCHRIDER Reloading 9 12-06-2010 01:27 PM
Heavy vs. Light Bullets SES50 Reloading 9 06-29-2007 12:46 PM
light bullets in 308 win coyotewallace Reloading 7 08-23-2006 02:40 AM
Light vs Heavy bullets with similar BC's Len Backus Rifles, Bullets, Barrels and Ballistics 0 05-02-2001 10:38 PM


All times are GMT -5. The time now is 08:43 AM.


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