Idont even worry about the BC as Im a lot more concerned with the rate of twist in the bore and what bullet I choose to shoot thru the bore for propper bullet stabilization,my drive in the game is to hit a nickel at 100yds or qa golf ball at 300 yds and if I can do that then I feel confident that I can take the heart out of anything that walks out to 300 yds and if I can take his heart out then he isnt going far..............................
The bullet examples you list really are not that far apart and the "high BC" bullet is not really all that high and the "low BC" bullet is not really all that low. To be honest, they are both medium range BC bullets.
I am really suprised at the velocity spread in your comparision as the BCs are really not all that far apart which would tell me bullet weight would likely not be much different if same caliber. Perhaps the case capacity is dramatically different in your comparision between the two which we do not have that information.
There is never a BEST choice, there are better choices for sure but it all depends on the situation and many different bullet will work in several different situations.
In reality, if your shooting under 500 yards, the lightweight, high velocity bullets will generally shoot flatter then the heavier slower bullets even if they have a dramatically higher BC.
If its windy, the heavy bullet may have an advantage at 500 yards but likely they will be very close simply because of the velocity advantage of the lighter bullet.
If you stretch things out to past 1/2 mile, the higher BC bullets will nearly always make hits easier at these ranges and farther, especially when its windy out or even breezy. Does that mean they are the best bullet, depends on what your doing and what you need the bullet to do once it arrives on target.
Simply put, there is never a single best bullet design, many will work, some are just better then others at certain things.
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If, however, the target type, worst anticipated ambient condition, and maximun range at which that target will be engaged is specified... would you entertain the idea that there is always an optimum projectile/charge/barrel combination?
There are only two things that affect wind resistance. Velocity and BC. Heavier bullets tend to buck wind better because heavier bullets uusall have higher BC's, but not always, depending on their shape.
As Kirby mentioned, it depends on the situation and the kind of shooting you are doing. Lighter and faster bullets will have a flatter trajectory in short to medium ranges, but then they loose velocity quckly due to their lower BC.
The best way to detirmine which bullet is best for your application is to crunch the numbers in a ballisitic calc using likely BC and velocity.
Last edited by MontanaRifleman; 05-28-2009 at 12:39 PM.
The best solution would be to run a exterior ballistic program, like montanRifleaman mentioned. Ive been using the Sierra ballistic software for almost 8 years,serves me well. And its relatively inexpensive. Oh ya and if you plug in the envirnment parameters thier usually pretty accurate.(i sometimes bypass that operation when getting rough estimates)
"Are the balistic programs allways right in the number they show."
Yes, the programs work on math formulas and all of the info you give or have is math based. So if the data inserted in the program is accurate, the results will be accurate.
If you want to see this work, take a look at the program Silhouette Ballistics. It allows for a great deal of data imput including, temp, pressure, humidity, altitude, wind, BC, velocity, scope settings and the actual true scope adjustments for your scope. It will give you sight setting in 25 yard increments out to 1,000 yards that are accurate based on your zero distance.
I have used the program to convert my normal sea level, high humidity shooting location's sight settings, to various locations in the US including the high desert at 4,500 ft for a world championship match.
If you put the program on a lap top you could adjust the data at the match or in the field.
Those that beat their guns into plows will plow for those that do not.