ORIGINAL: bigcountry
ORIGINAL: skeeter 7MM
How do you plan to increase sectional density?The calculation for SD is pretty basic so the only way to increase SD is heavier projectiles.
Sectional Density Calc.
7000 x (bullet diameter in inches) x (bullet diameter in inches) =X
Y= (bullet weight in grains)
Y divided by X = SD
I imagine they will lengthen the bullet with a lighter alloy, thats the reason barnes has such high SD and BC.
I am not sure I follow you BC pertaining to SD. SD is based on weight and bullet diameter. ie: .284 160 Barnes MRXor 160 Nolser Partition has a SD of .283! In order to increase the SD in a given caliber youcan only addweight to the above equation.