Had a Spanish FR-8, nifty little gun, but didn't shoot in the same league as a 'normal' standard Mauser. Too much unnecessary hardware hanging on I guess.
I'd personally steer away from the reworked .308's built off of any wartime German Mauser. That's a bit higher pressure in a smaller package, your probably exceeding the design limits somewhat. Germany was under the crunch from 42 on, and started short cutting a bit, only went downhill from there. Not so easy to find one prior to 42 in original, and one would be nuts to convert it.
You'll never know what your getting with an Israeli, was really a stopgap. Who knows the original source on those, some times they're partially marked, sometimes not. Had one in a classic .308 configuration, the mag well had the block and throat for .308, but it was still chambered for 8 Mauser. Talk about accidents waiting for the unwary.
Nicest Mauser I ever had was Brazilian police carbine in 7 Mauser, had unique cavalry style sling mounts, and beautiful walnut. Also was a tack driver, swear it never had seen daylight before my hands. Alas had to part ways with most of them.