There are a couple of guys on YouTube ringing steel at 1950yds with 260s. I like the 6.5cm and would build one if there were more choices for brass.
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Hornady Creedmoor brass is quality stuff and works just fine, provided you don't hotrod it...just like R-P 260 brass. It ain't Lapua but it ain't priced like Lapua either, so losing a bunch of pieces at a match isn't going to cause one too much heartburn.
The new Winchester 6.5 Creedmoor brass is...wait for it...Hornady brass with a Win headstamp.