Sectional Density is the relation between mass and cross sectional area. All calibres can have bullets of equal sectional density. For example a 130gn 6.5cal projectile has a similar SD to a 150gn...
Type: Posts; User: Shearer
Sectional Density is the relation between mass and cross sectional area. All calibres can have bullets of equal sectional density. For example a 130gn 6.5cal projectile has a similar SD to a 150gn...