I have already shot my Venezuelan Short Rifle (FN model 1930) chambered in 7x57 and it was a pleasure. I certainly intend to shoot my RC soon. Sadly, my club (HAHA) is under renovations (again) and is closed for at least another week
I also own a beautiful custom-made Mauser sporter (built on a small-ring FN action) chambered in 7x57, and I used to own an 1888 German Commission rifle, and though not a Mauser, it fired the 8x57 cartridge (Nabs owns that one now, and thankfully, it's bolt wasn't stolen!).
I can see myself picking up another RC. I'll see how this one shoots first.