besides the indian 308 is there any old miltary bolt guns that shoot 308 or 30-06 with a 8-10 round mag
The Germans had one for a while in 8x57 and 20 rounds:
https://www.instmiltech.com/mauser-trench-gewehr-98I recall seeing someone modify an Israeli K98 (7.62x51) to accept a 20 shot mag.
was it online or a magazine and do you know what kind of mags were they using
It was a long time ago, but online (might have been on ParrallaxBill's C&R Forum?). It was either M14 or SLR magazines and someone's project handy work.