A b.c. of .465 for a 150 .277 is crap. The 150 SuperBulldozer has a b.c. of .710. Even their 140 has a b.c. of .650.
The NP is a good bullet with reasonable BC.
The GS is a good Cup-n-Core with a modest BC.
... and the venison and pork taste the same.
For 600 yards, the fast-twist 150 and 165 ABLR looks promising, but then, getting closer is the challenge, not the shot.
GR