Thread: 6.5x55 factory ammo on deer ??

Second vote for SAKO GAMEHEAD PRO 130grn @ 2790fps.
Sad to hear it's ceased production.... Shop around for old stock.
Guncity is advertising SAKO 120grn, might be OK or a bit light, subject to bullet placement and range and species size.
GunCity also advertising Norma.
Advice from my Gunsmith was, "Buy European ammunition for European rifles." That excludes Hornady and Winchester.
European ammunition is 100 to 200fps faster than American brands, which typically overstate muzzle velocity.
Also you have a short barrel (not a 24 or 26" factory test barrel) so buy the fastest European bullets you can, subject to appropriate weight for species.