I'm familiar with an exact twin to the rifle jbyrd is holding. Purchased new in 1978. Before it had 100 rounds thru it, it had gone off on it's own when closing the bolt at least twice and maybe a third time, and nobody had touched the trigger adjustment. Was accurate enough to plink beer cans at 100 yards, so was accurate enough to plug deer, and it did.
Fast forward a few years and with 6mm Rem factory ammo unobtainable, I'm now reloading for it, with high expectations of one hole wonder accuracy. Now on paper with a decent shooter and a 5 shot group would eventually open up to 1.5 to 2 inches or more. What gives?
First thing was to replace the heavy pull trigger (about 5 or 6 pounds) with Timney trigger set at 2 pounds. That seems to have solved heavy pull and discharge problem.
Next was to realize that as these rifles left the factory, the action and barrel contacts the wood stock in three places. Two rear action screws pulling tight against wood stock, and a 3rd contact / pressure point just aft of the black spacer on the fore end of the stock. Put there intentionally by Remington and affecting harmonics of the barrel. General consensus the forward bump helps accuracy for the first or second shot, but if you keep shooting, the lightweight sporter barrel heats up, expands and starts pressing against that bump, which deflects barrel enough to send bullets elsewhere. One gunsmith also told me with or without the bump, a lightweight mass produced sporter barrel of this type can do that on it's own. As barrel heats up, groups open up. Nature of the beast. Or at least can be. Getting a good one that doesn't is possible, but a crap shoot. Same with action. Can be good, or not so much.
My dad had a nearly identical 700 BDL in 270 Win, which was a late 60's era gun, it has never misfired even once and is a 1 MOA gun or better. to my knowledge, original trigger (about 3 pounds), and same light sporter barrel. Original bedding, bump and all. Rifles like his are what set the standard and why they were so popular.
Hay day I shoot an 87 gr spritzer with 48 grains of 4831 . It will shoot 1/2 groups at 100 all day. 2 of the 3 will almost be in the same hole but the third is always got the triangle. Factory corelocky 80 or 100 gr and it was 7/8 to 1 in at 100. Some loads I messed with years ago it was bad. 1-3 in groups . But I haven't changed the load in that rifle for over 20 years.