Again, the 340 is fine with any factory ammunition or equivalent handloads. Remember that Savage chambered it for the 225 Winchester in the last two years or so of production. Frankly, I thought that was pushing the design some, especially in light of later reports of that cartridge showing erratic high pressure tendencies in factory loadings. I was never really comfortable shooting factory ammunition, and I backed off a bit with handloads. Never had any trouble with the rig.
With a scope, the 30-30 can be a 200-yard deer rifle using factory ammunition or handloads, if the hunter can do his part. (Read estimate distance and know where the rifle shoots.)
Anyway, spitzer bullets in a 30-30 would just look funny, kind of like a spoiler and hood scoop on a Chevy Volt.
340's have changed in detail over the years: extractors, ejectors,
triggers and stocks immediately come to mind. I have De Haas's analysis of the 340 from his book "Bolt Action Rifles." It has an exploded view of a typical gun. If you'd like a copy, PM me your name and address and I'll get a copy off to you