.303 Enfields are known for having generous chamers, and generally should be neck sized when reloading if you want to get decent case life. I wonder if the .308 ones are similar.
Not sure how you would do that with a .308, the .303 headspaces on the rim, so you can have a massive chamber and still pass a headspace check.
Also, Enfield magazines tend to be picky, and need to be tweaked for the specific rifle they are in. I suspect this also applies ti Ishapore .308s.
The issue with mine was the mag. The tab on the back of the mag that the mag release locked into, was just a tad off, and the rounds sat a skosh to low, and the bolt would not pick the round up as it went forward. If you held up on the bottom of the mag as you cycled the bolt, it wasnt a problem. I always just assumed that since it was a product of "India", that the issue rested there. Most of the rest of the gun was pretty rough as well.there is nothing picky about enfield mags. either a person stacks stripper clips wrong which causes rimlock and is not the fault of the magazine or people try to use magazine for the wrong type of enfield in the wrong gun or they just buy a crappy aftermarket mag, none of which is the enfield's fault.
as for that Ishapore 308s use a completely different mag design and considering that 308 is not a rimmed cartridge like 303 there are less problems to overcome.
Keep in mind that the Spanish FR7 and FR8 look like brothers, but the 7 is derived from the late 1890s small-ring 7x57mm, while the FR8 has the action of the Large-ring 8mm Mauser. There is quite a difference there, not just regarding 20th Century advances in steel production
I believe the FR8 was made using the Spanish Mod 43 large ring mauser as it's parent