Bryan Litz is a ballistician for Berger Bullets and Applied Ballistics. Bryan has authored a number of authoritative books on the subject of ballistics. His software, published by Applied Ballistics, can be found on a number of devices including the Kestrel Wind Meters by Nielsen Kellerman. The Applied Ballistics software and smart device app is considered an industry standard used by law enforcement and military units across the world.
In his sixth video, Bryan discusses bullet selection for long range shooting with big bore rifles. He provides details which my be inconsistent with what you’ve heard along your travels. What I like about Bryan’s approach is that he never abandons marksmanship fundamentals.