Point of Impact - mostly determined by barrel vibration and harmonies.
Overall length of cartridges - set to feed reliably from your magazine and clear the rifling by about .030" (.75mm).
Ballistic Coefficient - our BC's are calculated from charts supplied by E. I. Dupont De Nemours & Co and are a guide only.
Cannelure - our cannelure positions are measured from the tip of the bullet to the cannelure edge.