Initial drop tests with the 168 LRX to 1000 yards showed a .62-.64 BC out of my 7mm STW. I was easily getting BC's into the high .6's and Kirby into the .7's with the 265 LRX when it first came out. I do not have my data with me and going by memory. At one range session I remember Kirby saying it was grouping right with the 300 SMK to about 1200 yards. The BC can vary with each rifle and is not completely reliable doing preliminary drop tests but will put you in the ball park. When you decide on a bullet test it at various ranges to at least 1500 yards with excellent notes and checking it against your kestrel
or ballistics calculator with every shot. With BC adjustments after each shot in the end you will have the exact BC according to your equipment that matches your data.
Just like shooting anything for accuracy. Repeatability is the only thing that matters. As long as your equipment gives you the correct data everytime for consistent hits it doesn't matter if it says .65 BC with your rig and the next guys equipment says it is .7. A hit is a hit and as long as your equipment matches what you are doing you are going to hit.
Thanks for the link to the bullet catcher. I am going to construct one out of OSB with a lot more dirt so I don't get shoot throughs. My 1000 yard target is supported by two short telephone pole sections. The 225 CE bullet hit one and blew half the back side out through a good size pole. Still have not recovered one. But with enough dirt I will.
EDITED BY LEN
Most all my hunting is inside 1000 yards and I shoot bullets that are ballistically superior to that distance at the range I most encounter game and give me the best chance for a succesful hunt.