I am going to try and shoot again today to double check everything to make sure the chrono was giving me accurate readings (there was a lot of sun out). The one positive indicator is the Buffalo rounds were pretty close in velocity so the odds of the speeds being off makes it less likely? I'll post once I get results.

A good principle to guide me through life: “This is all I have come to expect, standard lackluster performance. Trust nothing, believe no one and realize it will only get worse…”