Had two Sako TRG-S rifles in 7.82 Warbird, Have a Sako TRG-S in 30-378 WBY, a Rem 700 Classic in 300 Wby, Win 70 Classic Stainless in 300 Win Mag, two Tikka T3's in 300 WSM, and 4 Rem 700's in 300 RUM (one is an Improved version) and had one in 300 Norma that is now the 300 LRH .... after 30 years of 30 cal madness I can honestly tell you to stay away from the WBY cartridges, nothing exciting about them, ugly as sin and for their case length the 300 RUM is a far better option, wby brass is highly expensive and if run at peak pressures for advertised/expected velocity, brass is pop and toss, reloads on brass require reduced loads somewhat then a 300 Win mag starts making more sense.... The 300 RUM makes the most sense for long range hunting, it has a stellar reputation for serious accuracy that the Wby's lack , if the 230 Bergers are too long for mag feed then the 215's are easily made to work along with the 212 gr ELDX and both bullets are capable of smacking big game past 1000 yards, after a dry spell More brass is now available for the 300 RUM via Nosler, Hornady, Norma, Bertram and ADG is cranking some out, before long Petersen will join in to get a slice of the pie, it's only a matter of time..... 30 Nosler ? an unbelted 300 Winnie, lacks velocity I like and that does not have any sex appeal at all and only Nosler has brass that isn't the best of quality at pressures for max velocity, the 300 WSM is slower but a sexier shorter gal .....
other than the 300 RUM , the 300 Norma Mag is a phenomenal cartridge and needs no introduction as for accuracy and velocity, just shy of the 300 RUM in speed but has far more sex appeal than all the other cartridges put together, the 300 Norma improved version smokes the 300 Rum and is seriously accurate, with a 30" barrel the 225 gr ELDM's zipping out at 3250 fps with 1/4" 3 shot groups at 100 yards is serious long range business ... Petersen is making brass in the new year, ADG is climbing aboard, rumor has it Hornady is going to release 300 NM and 338 NM brass and ELDX and M ammo at the shot show, another new brass manufacturer is coming in the new year and will be cranking Norma Mag brass among a few other things in the new year as well, Long Range shooters seriously need to look about them and surge forward hard and fast or be left behind with Great Grandads ol rusty junk........ cannot stress that enough and I know some guys will get their feelers all twisted but c'mon man, wake up and realize it's time to grow up and move on, Atari and Centipede is way, way outdated, much cooler games are to be had