I have experimented with pointed bullets in the .30-30, and have concluded they are not worth the trouble. If you load them to the same OAL as the flat points, you actually have less powder space, (bullet is longer) so lower velocity. If you load them longer, a 94 will not even feed one from the mag.
If the 340 will allow you to load longer, go for it. Just don't expect a noticeable bump in performance.
Now the way to juice up a .30-30 is to rechamber for the improved cartridge. Friend of mine has one (a 94) and it turns out almost .300 Savage ballistics.
Or get a 7-Waters.
I had a 340 in .222. Wish I still had it. It was dynamite on chucks, cheap scope, crummy trigger, and all. I paid 35 bucks for it in the late '60s.
A .30-30 is what it is, a perfectly adequate deer cartridge.