straightshooter wrote:The evaluation of wind drift is far more complex than simply picking one attribute and deciding that it will be the principal determinant of the degree of drift.
Many variables such as wind vector, gyroscopic stability, time of flight play a significant role as distinct from the popularly considered BC, projectile weight and muzzle velocity.
In my opinion it is far simpler to keep your shots within a distance where wind won't be liable to be a significant determinant of accuracy.
That is not to say that there aren't shooters who are skilled at guesstimating wind drift.
SCJ429 wrote:straightshooter wrote:The evaluation of wind drift is far more complex than simply picking one attribute and deciding that it will be the principal determinant of the degree of drift.
Many variables such as wind vector, gyroscopic stability, time of flight play a significant role as distinct from the popularly considered BC, projectile weight and muzzle velocity.
In my opinion it is far simpler to keep your shots within a distance where wind won't be liable to be a significant determinant of accuracy.
That is not to say that there aren't shooters who are skilled at guesstimating wind drift.
Even the most argumentative would have to concede that the major factors are BC and speed.
Wind vector, if the wind value is the same for two bullets the one with the best combination of BC and speed will be least effected by the wind.
Time of flight, is determined by the speed of the bullet over the distance. If the distance is the same for both bullets then the only factor is the speed.
Gyroscopic stability, if the rpm of the bullet is within the design limitations for that bullet then this would only be a small factor while the bullet is supersonic.
SCJ429 wrote:If you are shooting short range benchrest then you would use lower BC flat based bullets. At longer ranges VLD bullets and higher speeds will help you reduce your windage.
marksman wrote:distance has a bit to do with it as well, but not a bad test IMO
but l am a big fan of long skinny bullets that is like shooting needles eg...80gr bergers for 22cal and 105gr bergers for 6mm, 140gr bergers 6.5mm
the shorter fatter ones are fine for plugging varmints around up to 300
and if l can l will use flat based shorter fat ones
Stix wrote:SCJ429 wrote:straightshooter wrote:The evaluation of wind drift is far more complex than simply picking one attribute and deciding that it will be the principal determinant of the degree of drift.
Many variables such as wind vector, gyroscopic stability, time of flight play a significant role as distinct from the popularly considered BC, projectile weight and muzzle velocity.
In my opinion it is far simpler to keep your shots within a distance where wind won't be liable to be a significant determinant of accuracy.
That is not to say that there aren't shooters who are skilled at guesstimating wind drift.
Even the most argumentative would have to concede that the major factors are BC and speed.
Wind vector, if the wind value is the same for two bullets the one with the best combination of BC and speed will be least effected by the wind.
Time of flight, is determined by the speed of the bullet over the distance. If the distance is the same for both bullets then the only factor is the speed.
Gyroscopic stability, if the rpm of the bullet is within the design limitations for that bullet then this would only be a small factor while the bullet is supersonic.
Well the wsy i see it, is the chosen bullet, its BC & velocity are the primary & most important factors in regard to accuracy...
No the only factors, but the most important.
Quite simply because in any given rifle/hardware set-up,, the BC & velocity are the only factors we can vary/have controll over...
Once that primer ignites, everything else is a random constant...
bigpete wrote:Tested this for myself the other day. Yeah,the 17hmr doesn't drift bugger all as far as I'm concerned
bigpete wrote:They do sweet f all damage to the meat lol.
I'm using mine virtually all the time now to shoot for cash. And the tiny pill is reasonably safe to use around the vineyards. But yes,anything bigger than a fox is really a no go.
bigrich wrote:bigpete wrote:They do sweet f all damage to the meat lol.
I'm using mine virtually all the time now to shoot for cash. And the tiny pill is reasonably safe to use around the vineyards. But yes,anything bigger than a fox is really a no go.
yeah well, if ya shooting for cash it makes perfect sense . not a lot of bunnies around where i live ,so not much use for 22lr , 17hmr or other light calibers . foxes are getting a lot more common in the south east corner of QLD but ,not uncommon to see them around outer suburbs of brisbane, logan and ipswich now . my 222 suits the occasional roo culling i've done , with the reach and power for any fox/cat i come across
bigpete wrote:Where are you getting 25gn 17hmr ammo from ?
marksman wrote:bigpete wrote:Where are you getting 25gn 17hmr ammo from ?
l new someone would pick me up on that pete
no its not a 17hmr l am shooting its a 17 ackley hornet