Long Range Hunting Online Magazine

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

Long Range Hunting & Shooting Nightforce Optics


What caliber for a sheep rifle?

LinkBack Thread Tools Display Modes
Unread 10-28-2006, 10:50 AM
Gold Member
Join Date: Sep 2005
Posts: 748
Re: What caliber for a sheep rifle?

Ok swap it around use a 180gr roundnose projectile in a 308 24" barrel and then use a 210gr Berger VLD at 200 fpr slower at 1200 yards the 210gr projectile will shoot flatter than the lighter 180gr projectile that started out faster. Now get a 108gr VLD in the same rifle and the same velovity as the 180gr Round nose and a 210gr Round nose projectile the oposite will be true the 180gr VLD will win. another one get a 155gr Palma projectile in a 308 at 3000fps in a 30" barrel then get a 210gr VLD (much higher BC) at 2700 fps at 1000 yards the 155gr projectile has got there quicker but it has a lot more drift than the 210gr VLD and it will have a bullet drop similar or less.

All in all without the Bull#### about some fancy reinvention of the wheel and trying to be smart BC wins over velocity.

Now as has already been stated the wind drift in more important that the bullet drop. The reason is

Ok you are a proficent long range hunter well practiced and ethical in your shooting. You have a 1800 yard shot over a valley down hill at aroung 30 degrees you have a 338 Allen Mag you have a load with your 160gr Barnes XLC at over 4300fps and a load with a 300gr MatchKing at 3300fps. in the middel of the valley their is a small ravene and the day is cooling and the wind will start changing but winds are diferent and you must rely on local experience to get accurate readings. ( know this form being in charge of firefighting on the ground in the equivelent to your smoke jumpers. I used to repel into fires here in Australia in dangerous situations with my crew and only chainsaws and rake hoes).

So you take a laser or optical range reading, now you convert it with an angle cosign indicator and punch it into your palm pilot or refer to your data sheets. Lets say the 160gr projectile shoots flatter for the argument.
Now you take a reading with your wetherstation and fill in the relevent information about elevation, Temp, humidity and pressure etc. The wind is coming from left to right at a constant 15MPH

The program tells you what to adjust so you do it and take the shot.

Now at this stage you should have an exact elevation for either projectile irrespectivly of the one with a flatter trajectory.

So you take the shot with yout 160gr 338 and your mate takes the shot with the exact rifle with the 300gr 338 projectile at an animal standing 10 ft away from yours your friend has an extra 10 moa elevation dialed onto his scope. Both of your shots are perfect for elevation bur you did not know that when the air gets cool it gets heavier and creates a down draft that in that little gully in the middle of the distance. That downdraft is coming from right to left in the middle distance at 5MPH making you real shot at 10MPH from the Left

now the 168gr projectile gets blown back and hits the animal in the guts and tears a hole in him and he runs away never to be found duying in the bush somewher. But the shooter with the 300gr projectile only gets blown 1/3 of the distance and takes out the back of the lungs making the shot fatal and the animal runs a small way and expires humanely.

This is what DOES happen when people start talking about science when they do not use all the variables if you have a boat with a flat front and one with a V they both weigh the same both the same width both the same motors the more strrmlined one will win

Cheers Bill
<font color="red"> Ok How about we get on to what the thread is about the calibre someone would use for a sheep rifle. </font>
Reply With Quote

Unread 10-28-2006, 12:37 PM
Gold Member
Join Date: Sep 2003
Location: Blighty
Posts: 637
Re: What caliber for a sheep rifle?

if you have a boat with a flat front and one with a V they both weigh the same both the same width both the same motors the more strrmlined one will win

[/ QUOTE ]

Good analogy; but my part of the discussion here relates to how far each would drift in a cross current [img]/ubbthreads/images/graemlins/grin.gif[/img]

All the best

Reply With Quote
Unread 10-30-2006, 10:28 AM
ds ds is offline
Silver Member
Join Date: Oct 2004
Location: Cz
Posts: 235
Re: What caliber for a sheep rifle?

Hi Brown Dog,

I am out of my depth on this not being the sharpest knife in the when in doubt quote someone else....."wind deflection is not proportional to the time of flight. It is proportional to the amount of delay in the flight caused by air resistance".....From NRA Firearms Fact Book (then goes on to explain why .22HV ammo drifts more than .22 standard vel stuff). Not sure if that was already I said I am out of my depth.

Reply With Quote
Unread 10-30-2006, 03:25 PM
Junior Member
Join Date: Oct 2006
Posts: 11
Re: What caliber for a sheep rifle?

This in my eyes, is what I deem the perfect Sheep rig. Its a Mark Bansner "Ultimate Sheep Hunter" chambered in .300 Win. Mag., Rem. 700 action, Lilja bbl., leupold 2.5-8 vari X-III. Field ready it weighs 6lbs. 2 oz. It shoots 165 X bullets into tiny little groups.
Alot of people feel that they dont need that much power for Sheep, but after guiding in the Yukon, BC, and Alberta for 11 years, I will gladly take a little extra power, than not quite enough. I can say that without a doubt, that in the time I have spent guiding, that the .300 Win. Mag. was hands down THEE most popular chambering in our camps, on everything from Antelope/Deer to AK/YK Moose and Mnt. Grizz., and everything in between.
I will also say that I have a 7mm-08, .280 Rem. a 7mmSTW, and several others. I would use any of the above on a Sheep hunt, but if given the chance to build another "Sheep" rifle, it again would be chambered for the .300 Win. Mag. and nuthin' but!

Reply With Quote
Unread 10-30-2006, 03:33 PM
Gold Member
Join Date: Apr 2006
Location: Alberta
Posts: 868
Re: What caliber for a sheep rifle?

Hey CMFIC1, I see you found the site.

Welcome aboard!

Don't forget to drop me a line for coffee when you're in town.
Reply With Quote
Unread 10-30-2006, 05:37 PM
Gold Member
Join Date: Oct 2004
Location: Burns,Wy
Posts: 518
Re: What caliber for a sheep rifle?

Yeah I like the 280 AI option. I don't like the belted magnums.
Reply With Quote
Unread 10-30-2006, 06:04 PM
Gold Member
Join Date: Jan 2005
Location: Western MI
Posts: 718
Re: What caliber for a sheep rifle?

The 280AI is an excellent choice, 7mmRem Mag performance but should you ever run into a jam with lost ammo, you can always use 280 Rem factory ammo.
My 280 AI is on a 700 blueprinted action with a Hart #5 flutted 24" barrel.
The 160 gr AB shoots into the .2's with an average velocity of 3029 fps.
I just loaded up the 140 gr AB, .346" with avg vel of 3225 fps.

Hope this helps.

Reply With Quote


« Doc King | 25 WSSM »
Thread Tools
Display Modes

Similar Threads for: What caliber for a sheep rifle?
Thread Thread Starter Forum Replies Last Post
Advice on Sheep/Mountain rifle directtim General Discussion 2 01-25-2011 07:17 PM
Scope for Sheep Hunting Rifle redvlpr Long Range Scopes and Other Optics 15 01-05-2011 04:42 PM
Looking for some advice on a 7WSM sheep rifle cross Long Range Hunting & Shooting 6 01-26-2010 07:01 PM
auodad sheep caliber huntem Long Range Hunting & Shooting 7 03-07-2006 06:41 PM
Action for a sheep rifle Coues100 Rifles, Bullets, Barrels & Ballistics 7 11-27-2005 10:16 AM

All times are GMT -5. The time now is 10:37 PM.

Powered by vBulletin ©2000 - 2016, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2015 Long Range Hunting, LLC