I bought a lifetime supply of Nos LRAB 6.5mm 142 gr. based on advertised ballistic coefficient.
I could not get them to work in an 8" twist ratchet rifling 6.5-06.
The ballistic coefficient does not matter if I can't get them to work.

I had to hunt with 120 gr Nos Bal Tips.
They worked well enough to hunt. Typically:
1" group at 100y
12" group at 600y

There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. -Ernest Hemingway
The man who makes no mistakes does not usually make anything.-- Edward John Phelps