Thank you Mustang for the information . On my range as I use it alone I move a table to the desired range so only 100 yards is less of a problem then from 300 yards where a large pine trunk is 3 feet from bullet path . My son thinks I should cut that 70 foot tree down I have all the branches off to almost twenty feet and I doubt the bullet path will be effected 3 feet from the trunk.
I do not shoot anything smaller then .22 caliber and most of those are home swaged and have a flat base . Other swaged bullets like the ones shaped in a .223 die then sized for .351 W.S.L. have a unknown B.C. I could find it with Labradar not that is really matters a lot for the short ranges .
I read the instructions on the Garmin I like the idea of measurements of speed at distance of the labradar because that will give true B.C. with computer program.