05-31-2011, 09:14 PM
stanc Wrote:Thanks for those numbers, Bill.
No doubt about it.
Trouble is, that doesn't seem possible. With the environmental laws prohibiting lead in bullets, it looks to me like to get a circa 0.54 BC with steel (or steel and copper) as core material would make a bullet with an impractical L/D ratio. Barnes' nicely-streamlined 110gr solid is about 4.7:1, and only has a 0.45 BC.
[The other issue with solid bullets is that they do not compress as nicely as lead core bullets in the bore. I've shot a lot of the Barnes bullets, and you have to be very careful to avoid pressure issues. Along with that, I not sure they will tumble as readily as lead/copper bullets do. I've shot them through wood, and they look like they could be reloaded!] Bill
Make an eco-friendly FMJ or T3 bullet, with L/D of 5:1, and weight probably would not exceed 110gr. Which makes it seem likely that BC would be ~0.45, also.
On the subject of FMJs, what are the chances of you shooting the 120gr Normas (in 20" barrel) to 1000 yards?
I only have a very small supply of them, provided by Variable to do some steel penetration testing. I would be happy to try them at 1000, if I could get a 100 or so to work up a decent load.
You seek escape from pain. We seek the achievement of happiness. You exist for the sake of avoiding punishment. We exist for the sake of earning rewards. Threats will not make us function; fear is not our incentive. It is not death that we wish to avoid, but life that we wish to live. - John Galt