I like my Savage 340 ok. I got it about a year or so ago. $100 even from the shop because it was missing a mag (cost me about $30 to replace that). The stock was in pretty bad shape - the finish was yellowed and flaking off and it had a poorly installed set of swivel studs. Metal was in great shape though, and I did't mind doing some TLC to the stock (I stripped it, filled the holes from the swivels, and then refinished it). After a refinish and a thorough cleaning/oiling the gun looks much, much better than the sad little thing I first saw in the shop
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So far it hasn't shot quite as accurately as my Marlin 336. About 2" groups at 100 yards - sometimes 2.5". That's plenty good enough for hunting, but the Marlin is closer to 1.25-1.5" or so, which while still not as good as some of my bolt guns, is still pretty good for a .30-30. The Savage also has some feeding issues. Generally as long as I only put 2 rounds in the mag it's ok, but if I fill it up it'll bind up when feeding the first round.
Still, I like the .30-30 cartridge for what it is: a cheap, perfectly adequate hunting round for shots within a certain range (a range that 95% of my shots end up being within anyways). The guns chambered in .30-30 also tend to be extremely light as well since the lower pressure round allows for a smaller action. That combined with the typically shorter barrels make for an incredibly light rifle. For big calibers you have to specifically buy a "featherweight" - with .30-30's it's just implied. I also like bolt guns more than levers (not really an emotional issue for me - just a personal preference), so I still like my 340 too.
One thing to note about them too - I'd previously shot Winchester 94's with side mounts and hated it. The scope being that far off the bore center line just felt wrong, and I'm sure there was a serious penalty to the accuracy (seems like there's be some type of parralax error). I had also always heard that if you get a 340 that the B-Square mount was the way to go since it put the scope on center-line with the bore while the Weaver side mount didn't. Well, my little 340 came with the Weaver mount which I had already mentally said "I'll replace that" when I first saw it on the rack, but after getting it home - I really found no reason to. If the scope isn't on centerline it's so close that I can't notice. Not anywhere close to as extreme as the Win 94's I'd shot. About the only thing I think the B-Square mount gets you is the ability to use your own rings rather than them being integrated with the mount.
I would say that the 788 is probably a better choice if you want the best bolt .30-30 you can find, but based on going market prices you could probably buy 4 or 5 Savage 340's for the price of a Remington 788.