Quarter bore fans crack me up. Step down to 6mm and you get higher BCs and SDs. Step up to 6.5 mm and you get the same.
Then they love to compare their longer .257 cartridges to shorter 6mm cartridges. But choose to not campare them to the slightly larger 6.5mms at all.
Compare 6mm/.257 bullets of same weight using same case. Factor in BC, SD, and velocity. Then get back with me. Or how about the 6.5-06 or 6.5x284 vs. the 25-06 with heavier bullets?
.25s are DOGS. So are .277s when compared to 6.5s or 7mms. That's just the way it is. No magic, just math. Not my opinion, fact. Lower BC and lower SDs.
I readily admit that for what most are used for, it really don't matter. But don't start making the quarter bores out to be something they aren't. They do not fly better, and they do not penetrate better.
Anyhoo, I see another thread on this as been started so I'll refrain from further comment on that here. Even though I really haven't anything else to say on the subject anyway.
Back to our scheduled program........