odd question for the long range shooter
Firearm & Gun Forum - FireArmsTalk.com > Long Guns > General Rifle Discussion > odd question for the long range shooter

Reply
 
LinkBack Thread Tools Display Modes
Old 04-22-2013, 02:18 AM   #1
Feedback Score: 0 reviews
 
Nathantc's Avatar
 
Join Date: Sep 2011
Location: Lumberton,Texas
Posts: 560
Liked 42 Times on 33 Posts
Likes Given: 70

Default odd question for the long range shooter

ok here goes

heavier bullets hold there velocity better right

so two bullets of major weight differences traveling at the same speed at the muzzle should have very similar trajectories when zeroed at 100 yards and then shot at 50 and 150 yards

basicly lets take a 9mm carbine and a .22lr rifle

they both start out right at about 1200fps
the 9mm is 124g
the .22lr is 36g

from what i have been reading that would tell me that the heavy 9mm would have a flatter trajectory then the .22lr if shooting out to 200 yards max

or is there something im missing

__________________
Nathantc 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 04-22-2013, 02:53 AM   #2
Feedback Score: 0 reviews
 
Salvo's Avatar
 
Join Date: Apr 2013
Location: High Cihuahuan Desert, West Texas
Posts: 245
Liked 100 Times on 67 Posts
Likes Given: 22

Default

The shape of the bullet.

The information you are thinking of assumes that rifle bullets of similar shape are being compared.

__________________

Kind Regards, Salvo

Salvo is offline  
The_Kid Likes This 
Reply With Quote
Old 04-22-2013, 03:26 AM   #3
Feedback Score: 0 reviews
 
Nathantc's Avatar
 
Join Date: Sep 2011
Location: Lumberton,Texas
Posts: 560
Liked 42 Times on 33 Posts
Likes Given: 70

Default

Quote:
Originally Posted by Salvo View Post
The shape of the bullet.

The information you are thinking of assumes that rifle bullets of similar shape are being compared.
that correct,, like .22lr and 9mm are both shaped similar

lets say if you pushed a .270 110g at the same speed as a 30,06 180g

same speed now,, same shape, big difference in weight wouldnt the 180g be flatter out to 200 with a 100 yard zero

i know there is much much more to take in to effect at greater distances
__________________
Nathantc is offline  
 
Reply With Quote
Old 04-22-2013, 12:16 PM   #4
Moderator
FTF_MODERATOR.png
Feedback Score: 0 reviews
 
c3shooter's Avatar
 
Join Date: Feb 2008
Location: Third bunker on the right,Central Virginia
Posts: 16,576
Liked 8744 Times on 3779 Posts
Likes Given: 1341

Default

Search the term "ballistic coefficent". That is a measure of how well a bullet moves thru air. It is a function of the oversall shape of the bullet, and the diameter of the bullet. A round ball has about the WORST, a long boat tailed spitzer the best.

Round that have a poor BC will slow down sooner than a round with a good BC. That is, two rounds may START at the same speed, one will slow down before the other. Traveling slower, it will drop more in the time it takes to cross a given distance.

If we were shooting in a vacuum, it would not matter. This is why so many of the LONG range shooters use 6mm, or 6.6. They have a GREAT BC. For hunting- 25-06 or .270- about as good as it gets.


http://en.wikipedia.org/wiki/Ballistic_coefficient

__________________

<--- Your Moderators at our weekly Troll Hunt

c3shooter is offline  
 
Reply With Quote
Old 04-22-2013, 01:09 PM   #5
Feedback Score: 0 reviews
 
Join Date: Feb 2011
Location: West, by God, Funroe,Louisiana
Posts: 18,707
Liked 9203 Times on 5058 Posts
Likes Given: 74

Default

The effect of gravity is the same for every object. 32 feet per second per second or something like that. Meaning, everything falls to the ground at the same rate of speed (assuming a vacuum).

Now, where you get differing rates of bullet drop is this... How long the bullet is in the air before hitting its target. That's where BC and velocity come into play. High velocity and low BC will shoot flatter every time, regardless of bullet weight. If a bullet starts out at a higher speed, and loses its velocity more slowly, it will travel to its target quicker, not allowing gravity to affect it as much.

Now, there may be some that are more susceptible to wind drift, because wind CAN push around lighter bullets easier.

__________________
trip286 is offline  
 
Reply With Quote
Old 04-22-2013, 04:04 PM   #6
Feedback Score: 0 reviews
 
Salvo's Avatar
 
Join Date: Apr 2013
Location: High Cihuahuan Desert, West Texas
Posts: 245
Liked 100 Times on 67 Posts
Likes Given: 22

Default

Take a look at a 9mm bullet, and a bullet pulled from a .22lr...

In any pursuit of truth or fact, the ability and willingness to discriminate is job #1.

( Their shapes are quite different. )

__________________

Kind Regards, Salvo


Last edited by Salvo; 04-22-2013 at 04:08 PM.
Salvo is offline  
 
Reply With Quote
Old 04-22-2013, 06:03 PM   #7
Feedback Score: 0 reviews
 
Nathantc's Avatar
 
Join Date: Sep 2011
Location: Lumberton,Texas
Posts: 560
Liked 42 Times on 33 Posts
Likes Given: 70

Default

ok so then it would be safe to assume that if i go out and get a 9mm carbine it would shoot flatter out to 100 and 200 yards than my .22

the reason i am looking in to this is im trying to keep my ammo cost as low as i can while sill being able to rid my property of feral dogs and coyotes

the .22 works but not well,, and my .270win works great but at almost $2 per round and a major problem with over penetration

some keep telling me to get a .22mag or .17hmr but both will have the same issue i am having with the .22lr,,, just not enough kill power to be blunt

any way short question,, the 9mm should in theory shoot flatter

__________________
Nathantc is offline  
 
Reply With Quote
Old 04-22-2013, 06:14 PM   #8
Feedback Score: 0 reviews
 
Join Date: Feb 2011
Location: West, by God, Funroe,Louisiana
Posts: 18,707
Liked 9203 Times on 5058 Posts
Likes Given: 74

Default

If it leaves at a higher velocity and has a lower BC, then yes. I personally don't know if it meets either condition.

I'm trying to dig it up for you, but I can only find ballistics info on 9mm for handguns, not carbines.

__________________

Last edited by trip286; 04-22-2013 at 06:20 PM.
trip286 is offline  
 
Reply With Quote
Old 04-22-2013, 06:57 PM   #9
Feedback Score: 0 reviews
 
Nathantc's Avatar
 
Join Date: Sep 2011
Location: Lumberton,Texas
Posts: 560
Liked 42 Times on 33 Posts
Likes Given: 70

Default

Quote:
Originally Posted by trip286 View Post
If it leaves at a higher velocity and has a lower BC, then yes. I personally don't know if it meets either condition.

I'm trying to dig it up for you, but I can only find ballistics info on 9mm for handguns, not carbines.
no ideal what the BC is for the 9mm but i personally chronographed the cheap PMC JHP 124g 9mm from my last hipoint 995ts (16" barrel) right under 1400fps,, cant remember the exact numbers and i know the 22lr is rated at 1250fps,,, i know these numbers wont be exact but there damn close (within 100fps for sure)
__________________
Nathantc is offline  
 
Reply With Quote
Old 04-22-2013, 08:06 PM   #10
Feedback Score: 0 reviews
 
Join Date: Feb 2011
Location: West, by God, Funroe,Louisiana
Posts: 18,707
Liked 9203 Times on 5058 Posts
Likes Given: 74

Default

Then I would consider it sufficient.

__________________
trip286 is offline  
 
Reply With Quote
Reply

Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Firearms Forum Replies Last Post
Private Gun Range app of CO shooter. Wiebelhaus Politics, Religion and Controversy 2 07-23-2012 02:10 AM
Took a new shooter to the range today :) shadamai Range Report 10 02-06-2012 12:17 AM
Nosler M48 TGR First Range Report - It's a shooter bullet General Rifle Discussion 6 11-08-2011 01:19 AM
Home Defense handgun - fun range shooter? iftrue General Handgun Discussion 23 11-24-2010 03:25 AM
Range etiquette? First time shooter jtrain Training & Safety 28 02-22-2010 03:47 PM