I'm a bit slow, just found this posting & there a quite a few 'out there' or out here that have 6.5x55's. Most I know have the m96 & on or two have a tikka/sako (late model stuff) chambered in the cartridge.
Just did a check on the paperwork, I currently have "more than six" m96's in a variety of configuerations. Some were butchered before I acquired them & one I put back in the timber, because it is now more consistently accurate & groups better than the plastic stocked one.
Just to reinforce the above comments regarding the 6.5x55 being a low pressure (45,000psi) round, do not load the cartridge hot for the old Sweeds, they stretch more than modern firearms but will reach a limit. Stay below 45gn of 2209 with a 140gn pill, if you value the old collectors.
I have a limited supply of the FMJ issue ammo & have tested it over my CED along with my reloads.
IN MY GUNS (yours may well be different) with a 139/140gn Lapua/Sierra - anywhere between 40 - 42gn of 2209 will duplicate the issue ammo.
I had a barrel that some "rather stupid person" had attempted to 'make it go faster' & when I bought it (as an original) found the fired cases would touch the insides of the body of a neck die, which meant the case was expanded sidways in the body nearly a full millimetre!
I've since changed the barrel to a near mint, 'un-numbered' & maybe unshot job. A mate sourced it from some 'stripped imports' many years back.
I really want to try the old cartridge in a stronger moderm receiver but finance is the problem, the brass should take up to 60,000psi (maybe more, the 200 Lapua, spare in the shed, just waiting to be used).
Waiting on Lotto!