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The Rem. rifles aren't as nice to look at but are just as reliable.The RUM ammo or brass if you reload is cheaper then the 300 WBY. The RUM case is larger so it holds more powder and will out run a 300 WBY, with ease, but not by a lot.Rem 700 rifles have a lot more aftermarket parts available, that and the ease of working on them is why most gunsmiths prefer Rem's. A Lot of smiths dont even use WBY actions for builds.
I liked the fluted barell on the sendero my accumark is fluted to they say it disipates the heat better but I don;t know that as a fact.
....my Rem 300 rum shoots sub moa out of the box with factory ammo...