Calculator ((link)): Jbm Ballistic

Want to know why your 1,000-yard shot drifted 2 inches right even though there was no wind? JBM includes spin drift and the Coriolis effect (Earth’s rotation) by default. Most "cheap" apps ignore these until you pay for the "Pro" version.

My workflow: I use JBM at home to build my master drop chart. I print that chart and tape it to my stock. For live wind calls in the field, I use a simple weather meter and a kestrel. But the foundation of my dope? Always JBM. jbm ballistic calculator