Hi,
A friend of mine mentioned that while in Switzerland, he had obtained one of the Swiss straight-pull rifles in 7,5x55.

It seems that ammo is scarce as democrats on AR, but according to Norma the same bullets as in the .308 can be used.
This sounds odd to say the least, as the cartridge drawing indicates .304" bullet dia.
Can anyone confirm if this is correct?

- Lars

The 7.5 Swiss does indeed use .308" bullets quite nicely. It also uses .284 Winchester brass opened to take those .308" bullets, just fine.

I use both factory Swiss ammo, and handloads with .308 bullets in both my Swiss International Martini and my K-31 Swiss army rifle. No noticeable difference in either. Of course the Swiss cartirdge has been around since the late 1880's, and cartridge dimensions were changed in about 1911, IIRC. It may be that bullet diameter was increased at that time, but to be honest, I never noticed if that was one of the changes when I was reading the background material on both versions.

Drawing is wrong. some will argue about it being maybe .307" or .306" due to their bullet or bore measurements. WFBern(gov fact) specs call for a .3087" projectile. The old 3 groove pre 1911 barrels would measure about .304" but when one gets that measurement remember that the measurement is being taken from the bottom of one groove to the top of the land just across from it.