7/26/2023 0 Comments Shooting range log book template![]() If I had time and a range up to the task, I would “true” the ballistic data by comparing what my card says to what actually happens and adjusting the numbers to match. The trouble is that this is only a “best guess,” as it’s not actually based on any previous engagements. For this particular competition, I zeroed my rifle for 30 yards, in line with my theory on the ideal 22LR zero.įrom there, simply plug in your numbers and define what data you want back. ![]() Using a Magnetospeed, I averaged a velocity of 1039.4 feet per second at the muzzle. Never trust the velocity listed on the box. Lapua lists the ballistic coefficient (BC) as a. ![]() In my case, that’s a Lapua Center-X 40gr 22LR cartridge. So what data do I need?įirst, you must know the bullet you’re firing. I’ll be the first to tell you that the card I’m using for the match is only a “best guess.” I built it from gathering some information together and running it through JBM Ballistics.
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