OK, i've looked and looked through the manual, but I'll be darned if I can find the definition of the two numbers in the upper right hand corner of each set of load data.
What are BC and SD?
Thanks,
Matt
What are BC and SD?
Thanks,
Matt
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Lyman Manual Question
- Thread starter matt
- Start date
BC is balistic coefficient
SD is sectional density
These numbers are used to compute bullet drop at vaarious ranges and velocities. The BC is used to compare the bullets' balistic properties to the "standard" bullet that was used to develope the balistic tables and the sectional density is a ratio of the weight and length of the bullet.
Higher numbers are better than lower and indicate that the bullet will have less drop and better retained energy for a given velocity / range.
SD is sectional density
These numbers are used to compute bullet drop at vaarious ranges and velocities. The BC is used to compare the bullets' balistic properties to the "standard" bullet that was used to develope the balistic tables and the sectional density is a ratio of the weight and length of the bullet.
Higher numbers are better than lower and indicate that the bullet will have less drop and better retained energy for a given velocity / range.
