Just read an article in "RIFLESHOOTER" about this caliber apparently developed by Nammo Lapua Oy. Cartridge was developed specifically for long range target shooting...the project was originally started in 2005.

The article suggests it is basically a .260 Rem. Improved --has the same head and body diameter as the 308 Win..so one can rebarrel and use the same magazines, bolts, and actions...

Interesting test shows the cartridge is actually equal too or superior to the 300 Win for targets to 1000 yards with less wind drift and bullet drop..this is comparing a 190gr in the 300 Win and a 130gr bullet in the 6.5...article also shows the b.c of the 6.5 bullet was .620 and .53 for the 300.

Thx

Ripp