You are Unregistered, please register to use all of the features of FirearmsTalk.com!    

Firearm & Gun Forum - FireArmsTalk.com > General Firearms Forums > Hunting Forum >

Trajectory and POI, Confused.


Reply
 
LinkBack Thread Tools Display Modes
Old 11-16-2013, 07:40 PM   #1
Feedback Score: 0 reviews
 
Layla's Avatar
 
Join Date: Nov 2013
Location: Montana
Posts: 1
Default Trajectory and POI, Confused.

I would like to know if on a .300 win mag sighted dead on at 100 yards with a yard marking scope if I still need to compensate for the drop of about 3 1/2 - 4 inches with a 300 yard target?

Not my gun, my brothers, he seems pretty convinced that I don't need to adjust for any drop when firing his gun past the dead on mark. Im confused.


Layla is offline  
 
Reply With Quote

Join FirearmsTalk.com Today - It's Free!

Are you a firearms enthusiast? Then we hope you will join the community. You will gain access to post, create threads, private message, upload images, join groups and more.

Firearms Talk is owned and operated by fellow firearms enthusiasts. We strive to offer a non-commercial community to learn and share information.

Join FirearmsTalk.com Today! - Click Here


Old 11-16-2013, 07:52 PM   #2
Feedback Score: 0 reviews
 
Gatoragn's Avatar
 
Join Date: Dec 2010
Location: North GA. Back home in Dixieland.
Posts: 3,837
Liked 1466 Times on 830 Posts
Likes Given: 651

Default

According to the attached graph drop is about 10 inches at 300 yards, that is significant. I prefer to sight my deer rifles about two inches high at 100 yards.

http://gundata.org/cartridge/63/.300-winchester-magnum/


Gatoragn is offline  
 
Reply With Quote
Old 11-16-2013, 07:54 PM   #3
FTF_SUPPORTER.png
Feedback Score: 0 reviews
 
MisterMcCool's Avatar
 
Join Date: Feb 2013
Location: Bumfugg, Egypt
Posts: 11,683
Liked 11094 Times on 5876 Posts
Likes Given: 23813

Default

If the scope is zeroed at 100 yards, it will impact about nine inches low at 300 yards.
__________________
I drink and I know things (̿▀̿ ̿Ĺ̯̿̿▀̿ ̿)̄
MisterMcCool is offline  
 
Reply With Quote
Old 11-16-2013, 07:58 PM   #4
Feedback Score: 0 reviews
 
Join Date: Feb 2011
Location: Hickory Ridge, AR
Posts: 479
Liked 130 Times on 97 Posts
Likes Given: 152

Default

Quote:
Originally Posted by Layla View Post
I would like to know if on a .300 win mag sighted dead on at 100 yards with a yard marking scope if I still need to compensate for the drop of about 3 1/2 - 4 inches with a 300 yard target?

Not my gun, my brothers, he seems pretty convinced that I don't need to adjust for any drop when firing his gun past the dead on mark. Im confused.
Get the ammo make and the weight of the bullet and go to the MFG's website, there is almost always a graph that shows the long and short trajectory. If this turns into a pain, post the make and bullet weight here and I'll see if I can't get it and post it on this thread.
__________________
If I write a post and it sounds like I'm trying to tell you what's best for you, it's because I write like crap.
p35bhp55 is offline  
MisterMcCool Likes This 
Reply With Quote
Old 11-16-2013, 08:41 PM   #5
Feedback Score: 0 reviews
 
Join Date: Feb 2011
Location: West, by God, Funroe,Louisiana
Posts: 18,707
Liked 9219 Times on 5061 Posts
Likes Given: 74

Default

Where's y'all's manners?

Welcome to the forum Layla! Hope you enjoy your time here and stick around if you'd like.

And yes, these guys are correct, you do have to compensate for bullet drop past the zeroed range.

A website you can check out is hornady's. They have a chart on there for different weights and velocities. It may not apply EXACTLY the same with all other maker's ammo, but it'll come out so close that it probably doesn't matter. I'll see if I can find I link for ya, but the 9-10 inches already mentioned is pretty accurate.

I think there's also smart phone apps for that.
trip286 is offline  
 
Reply With Quote
Old 11-16-2013, 08:44 PM   #6
Feedback Score: 0 reviews
 
Join Date: Feb 2011
Location: West, by God, Funroe,Louisiana
Posts: 18,707
Liked 9219 Times on 5061 Posts
Likes Given: 74

Default

Here's a calculator. Looks like it's pretty detailed.

http://m.hornady.com/ballistics-resource/ballistics-calculator
trip286 is offline  
 
Reply With Quote
Old 11-16-2013, 08:45 PM   #7
Feedback Score: 0 reviews
 
Join Date: Feb 2011
Location: West, by God, Funroe,Louisiana
Posts: 18,707
Liked 9219 Times on 5061 Posts
Likes Given: 74

Default

And here's their downloadable chart.

http://m.hornady.com/ballistics-resource/ballistic-chart

Have fun!
trip286 is offline  
 
Reply With Quote
Old 11-16-2013, 11:13 PM   #8
Administrator
FTF_ADMIN.png
Feedback Score: 0 reviews
 
c3shooter's Avatar
 
Join Date: Feb 2008
Location: Third bunker on the right,Central Virginia
Posts: 20,150
Liked 14099 Times on 5961 Posts
Likes Given: 2342

Default

Hi Layla! As the folks have said-ALL bullets begin to drop when they leave the muzzle. The line of the bore is above the point of impact- when you shoot, you shoot UP- and the bullet drops back down to your target. Further away, bullet has continued to fall. If you do not allow for that, you will miss.

This is just a sample- firearm here is zeroed for a 200 yard target. Bullet rises above line of sight, and drops back to hit at 200. But if zero is not changed, or shooter does not compensate for longer range, bullet will hit lower and lower as you move further out. Just like using a garden hose- to get something wet further away, you point higher.

trajectory.png
__________________
What we have here is... failure- to communicate.
c3shooter is offline  
p35bhp55 Likes This 
Reply With Quote
Old 11-16-2013, 11:56 PM   #9
Feedback Score: 0 reviews
 
Join Date: Feb 2011
Location: Hickory Ridge, AR
Posts: 479
Liked 130 Times on 97 Posts
Likes Given: 152

Default

With Bullet weights from 130 to 200 and MV from 3500 to 2700 (and this was just Federal) I'm thinking the devil will be in the details.
__________________
If I write a post and it sounds like I'm trying to tell you what's best for you, it's because I write like crap.
p35bhp55 is offline  
 
Reply With Quote
Old 11-17-2013, 12:31 AM   #10
Feedback Score: 0 reviews
 
KG7IL's Avatar
 
Join Date: Sep 2010
Location: Eatonville,Washington. My nearest neighbors are cows.
Posts: 3,111
Liked 2368 Times on 1313 Posts
Likes Given: 6794

Default

It is possible to have a 150-200 yard zero and forget about it.
Not that this scores 10's, but it's a shoulder/heart shot for 0 to 300 yards.
.300 WinMag is fairly flat shooting.


KG7IL is offline  
 
Reply With Quote
Reply

Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Firearms Forum Replies Last Post
.22lr trajectory graph Jasson .22 Rifle/Rimfire Discussion 3 08-28-2012 09:00 PM
Bullet Trajectory of 5.56 sublime42283 AR-15 Discussion 16 03-14-2012 03:32 AM
Trajectory Tables rab Competition Shooting 2 03-02-2010 12:41 AM
Bullet Trajectory/Safety Pistolero Hunting Forum 4 05-17-2008 11:50 PM
Trajectory question oldredneck General Handgun Discussion 2 12-09-2007 08:40 PM