Butcher45, Thanks for providing a helpful tool that many people will have come in handy , I know I will use it. Hi Mr. JonnyReb, Hope all is level in your world and all in it is fine. Butcher45, I have seen your name all over the internet where Air Rifles and Hunting are. Melting lead and Casting your own lead projectiles and just about anything to do with Air Gunning and Hunting and you have written something awesome and informative about it. You sure know a lot about this sport of Big Bore Air Guns. I have 4 Big Bore Rifles from .456 - .58 Caliber. Could you help me choose some ammo out for a few of these Rifles so I can understand how a Air Gunner that is Noted in the sport comes to the correct ammo for the Rifle, And job at hand. The .456 Sam Yang 909S ( Tuned ) is a Great Rifle, Just there is not much .456 out there for them. I buy my Lead from Bob V @ Mr. HollowPoint.com, I get my Ammo there and Hunters Supply, But some of what I bought just dont shoot well. If you could point out some Ammo , It would be so Helpful. Jetman/ Gary Catania / Disabled US ARMY.