Obviously, this is not a commercially produced die. It is a very nicely made custom die intended to duplicate a standard JSB pellet shape in 30 Cal. Its nicest feature is that it doesn't use bolts to hold it together, but a tightly fitting steel ring. This makes it much quicker to disassemble and remove the pellets. Die material is stamped on the side, SKD 11, a high carbon, shock resistant, rust resistant die steel. The 12% chrome content officially makes it a stainless steel. Over all, nicely done. And yes, the music... is a distraction.
Good night friend. I would like to know where you got it because I'm interested in purchasing a mold like that? If you can let me know where you bought it I would be very grateful.
BC isn't as useful as you would think. You can't trust the BC manufacturers give you, because BC is velocity dependent, meaning your projectile has not just a different BC for each individual airgun, but it's BC changes in flight. It's much better to use real world data. That's why I use an application called Scopeknob, made by Eric Sanders. It uses something called velocity retention factor, which involves you chronographing at the muzzle and then at 10 yards and then dividing the 10 yard velocity by the muzzle velocity, resulting in a figure of less than 1. It's arbitrary, but it doesn't matter if you always use the same procedure. That along with your scope height, velocity, ect will give a pretty good approximation of pellet trajectory. You then take that data to the range, zero at your optimal zero, and then shoot at a close range and a far range, noting how many clicks away from your zero you are on each, compared to what the calculated trajectory is. You then plug the real world numbers into Scopeknob again, and it adjusts everything to line up with the real world data, using the theoretical data as a starting point. Once there, it prints out a tape you can wrap around your elevation turret that has all the distances marked. I've shot field target with this, and hunted with it, and it works.
By the way, the best way to find BC, if you need it, is to calculate it yourself using real world data. I just started using VRF instead because of Scopeknob.
