Here's a Screamer for ya …
… 300 RUM ...
Bullet - 178gr. BTHP Match
Powder - 102gr Retumbo
= Velocity - 3,300 fps … BC - .530
At that Velocity this Bullet is Screaming down range while achieving a BC that stands up against other .30 Caliber Bullets without compromising Energy at Impact.
DANG, but that's a lotta powder to only gain 100 fps over the .300 Weatherby...……………………...