The Firing Line Forums - View Single Post - Balistic Coefficient of a .54 cal round ball

JackFlash · July 24, 2000, 02:17 AM

Thanks, I was getting BC confused with SD. I used to pay attention to SD in lead handgun bullets -- so the shorter/lighter ones have a lower sectional density than the longer/heavier ones.

Now I'm finding out that some 7.62 X 39 ammo uses a bullet with a "plastic" tail section to affect ballistic coefficient. --Which would also affect sectional density.

OK, I understand now!

July 24, 2000, 02:17 AM	#5
JackFlash Junior member Join Date: July 8, 2000 Posts: 107	Thanks, I was getting BC confused with SD. I used to pay attention to SD in lead handgun bullets -- so the shorter/lighter ones have a lower sectional density than the longer/heavier ones. Now I'm finding out that some 7.62 X 39 ammo uses a bullet with a "plastic" tail section to affect ballistic coefficient. --Which would also affect sectional density. OK, I understand now!