Sendero fans, What is your favorite round?

I just picked up a Sendero in a .300 Win Mag, and wanted to get a few opinions from fellow Sendero shooters about which round they like best out of their weapons for long range hunting (Muley's and Elk). I'm open to comments about factory and handloads. The June/July issue of EHJ had a pretty interesting section on factory rounds, and I wanted to know what other Sendero shooters had to say. Thanks for your opinions guys!
One of the most accurate rifles I ever owned was a 300 Rum Sendero. It had been bedded and floated but it was a one-holer with just about everything I shot through it.
 
My 7mm Rem Mag would shoot one hole with 168 gr ABLR.
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I once had a rare, 700 police rifle. Genuine police issue. In 7mm mag. It would shoot 1/4 min groups at 200 with Berger 168 vld. And shoot Barnes LRX IN A HOLE.
 
Last, but not least, I have a late 90's version Sendero, in 25.06ai. It was reamed to ai as soon as the Gunsmith brought it home. Shoots 1/4 groups with 92 grain Hammer Hunter, @3748.
Whitetail lightening!
 
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