STOMP442
Gold $$ Contributor
So, I was working up a load for a client of mine and when I went out to do the ballistic validation I noticed that the BC for the 140 ELD-M was considerably lower than it used to be in the Applied ballistics app. The AB app is currently listing a G7 BC of .301 and a G1 BC of .587. This is much closer to what the old Amax used to be. I went with it and sure enough firing solutions were not working out well at all. I went in and manually changed my G7 BC value to what it used to be .322 and things came together like they were supposed to. Does anyone know why the BC values were lowered by so much? Have they actually changed the design or something and I am just using an older lot of bullets with a better BC? I understand that AB is consistently testing bullets and updating values but this seems like a large drop.
Hornady Advertised BC Values:
G7 = .326
G1 = .626
Applied Ballistics old BC Values:
G7 = .322
G1 = .629
Current Applied Ballistic Values:
G7 = .301
G1 = .587
Hornady Advertised BC Values:
G7 = .326
G1 = .626
Applied Ballistics old BC Values:
G7 = .322
G1 = .629
Current Applied Ballistic Values:
G7 = .301
G1 = .587