I had a cunning plan to do this too, as an attempt to accommodate worn/oversize bores in old Lee Enfields (military and sporting). In my case the donor bullets are the Sellier & Bellot 196gr .318-dia projectiles currently available (albeit sporadically) in Oz.
Trouble is, most (all of mine!) worn three-ohs still have a tight chamber neck and won't accept a cartridge loaded with a ~.315 projectile. But given the bores are already beyond normal service, I now need to have a throat reamer made to open up the neck area. Onward, ever upward...!

kuduae: just to clarify the BGR rule, its designed to eliminate firearms that would unfairly compete against 'actual' big game rifles. And that's the Australian definition of big game, not American; ie Asian buffalo, African DG etc. The cutoff for Group 1 is .330-min and 2900 ftlbs. In the good'ol'days the 9.5 Mannlicher and .375 x 2 1/2 were allowed under an exemption, but when the discipline was "nationalized" (for the good of the sport, I must add) the exemption disappeared.
Our local club still honours the exemption for our monthly shoots, but not State or National championships.

Also Daryl, I think all those Hornady .330 205gr bullets are military-pattern FMJ. All the ones in my possession are.

Back to maneaters in India....?