I have a lot of Model 70s, pre-64 to the new FN Model 70s.
DO NOT underestimate the push feed actions, there is nothing wrong with them at all.
I have two post 64s/pre USRA Model 70s from the CMP auction sight, Target rifles made by the AMU. A 308 and a 300 WM. They are shooters.
Years ago I met a guy who went along the Alaska Coast buying junk rifles from Alaska Natives. I bought "6" post 64s actions from him (total $235 for all 6), I put together some damn good target and hunting rifles. Long range 1000 yard rifles in 300 WM for the AK NG Rifle team.
In '74 I bought a new Model 70 in 375H&H, a push feed I'm still shooting today. I was concerned about the extractor so I bought a spare and drilled a hole in the butt stock of the rifle, under the recoil pad, so I would have a spare if I ever got caught with a broken extractor. That was 41 years ago, I've shot the crap out of that rifle. The extractor is still in the butt stock.
I'm still looking for more M-70 actions. I still need a 260 Rem, and a heavy barreled 270 Win target rifle and a couple others on my "to build" list.
I do like the trigger on the FN Model 70s, but there isn't a thing wrong with the other Model 70 triggers.
I certainly wont pass up a push feed. The Rem 700s are pretty popular for target rifles, its push feed, I don't see a lot of people crying for a control feed M-700.
I will admit, for some reason I don't have a USRAs Model 70. I don't know how they snuck by, just never ran across one. And probably my favorite is my 1949 Pre-64 in '06. One smooth action. With the steel butt plate, Weaver El Paso 4X scope, just screams AMERICA'S RIFLE.
And my number one hunting rifle is the FN Featherweight in 270 Win.
But my target rifles are all post 64 push feeds. The two AMU guns I mentioned and a '06 Vietnam era Sniper Clone and my 300 WM 1000 yard rifle I used when I shot for the Guard.
In short, don't over look post 64s/pre classics, there is nothing wrong with the push feeds, never head of anyone breaking an extractor or any other confirmed problems.