Hi barbender. If you have an Enfield that is genuinely and consistently "clover leafing" I also would not be touching it. For many service shooters, making their old battle rifles
consistently group into moa or better is mostly a pipe dream. Even if they do mechanically print as such, it's another thing altogether to realise that sort of accuracy on the mound - at the very least, you need some pretty fancy sights to do it, not to mention the immense amount of experience to make it to master grade (the ones who can actually push their rifles to their limits). Different story of course if you are running a scope on your guns, and tend to shoot off some kind of mechanical aid. I guess it really boils down to how you intend on using it.
223 conversions are popular in service, and accurate. You often see very close to perfect scores by masters with custom 223s, even on the 300m line, so the 6.5 won't offer a big advantage within 300m, even 400m. Beter to go with a smaller, more economical/efficient cartridge IMHO. Allegadly the 6.5 starts to shine approaching 1000m - but from an Enfield out to 500m,
all things equal I bet you couldn't spot the difference between a 7.62 and a 6.5
W.R.T the Savage 99 - very interesting old gun, way ahead of its time. Flush magazine perfect for stalking. Convinient to handload spires etc. They
are prone to wander though, if you are punching paper. A very tightly fitted forend plays havoc to the harmonics as the barrel heats. The Savage 99 is fairly heavily covered in the book "Accurizing the Factory Rifle" by "Mic" McPherson, whereby one can RTV silicone bed the forend to make them better range guns. But gettting back to your question, mate, just about the
perfect hunting rifle IMO. 308 a no brainer for hunting, both figuratively and physically
I'd buy one if they were still being made.
Cheers,
In2.