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
Australia
<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>
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
Australia
<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>
