It's amazing how so many people are nit-picking over magazine-length differences in the newer 6.5 rounds from the .260 on up, when cartridges like the 6.5x57 and 6.5x55 work so well in ".30-06 length" magazines, with zero bullet-seating issues. I've been tempted by the 6.5x57 a few times, but then ended up with enough Lapua 6.5x55 brass at a really good price to last me the rest of my life. (Mine's on a commercial FN 98 action.)
The 6.5x57R (not B) is the same round as the rimless 6.5x57, but with with the rim added to work in break-action firearms. Mine's in a Sauer drilling with 16-gauge barrels. And of course there are no complications with bullet seating....
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.” John Steinbeck
