Re: Need some information on Winchester model 70 .243
I think, but check as suggested, that it is mid 1990s, is push feed, and is without the MOA trigger. Push feed is fine, unless you like to hang upside down from a tree while firing over your shoulder, in which case the controlled feed may have an advantage. I've never heard of push feed affecing accuracy. The MOA trigger is a recent innovation for Winchester--sometime after 2008 when production was taken over by Fabrique Nationale Herstal at their Columbia, SC.
I purchased a c. 1981 .30-06 featherweight in 98% condition a couple of years ago from Gander Mountain and paid $390 for it and then another $250 for a used Leupold 3x9x40 scope. Accuracy is excellent, but in hunting rifle, you are shooting with a cold barrel, so dialing them in takes time because that barrel heats up quickly and you need to shoot with a cool barrel to replicate field conditions.
IMHO, 500 yd shots should be taken with a heavier barrel/gun than a featherweight--there is a reason sniper and target rifles have heavy stocks and bull barrels.