Re: Need help figuring out discrepancies
Sighted in at later in the day say late evening, then shoot at noon, Mirage, reading 500yrd drop and shooting at 550 (it's an easy mistake to make) If something like this happened I can see it happening pretty easy or even being worse. I bet your discrepancy is in the details somewhere though.
Keep in mind the animals we shoot for food and display are not bullet proof. Contrary to popular belief, they bleed and die just like they did a hundred years ago. Being competent with a given rifle is far more important than impressive ballistics and poor shootability. High velocity misses never put a steak in the freezer.