The only Ruger product I've ever bought (or will buy) is a 10/22. It was filled with sand new from the factory which I had to clean out. It worked ok but wanted expensive ammo to shoot well. I gave it to my Mom.
I have several military surplus rifles, the best and most accurate of them is a Swiss Schmidt Rubin K-31 straight pull bolt with a 6rnd box mag. 1.5moa or better with the swiss surplus ammo. These are beautiful guns, the machine work is complex and awe inspiring. The stocks can be ok or can have damaged wood on the stock from being sat in the snow. They are at about 160 and rising in price and well worth it.
The turkish mauser I have is a five round box magazine bolt action in 8mm. It's good for 3-4 moa but I've not done anything to help that yet. This was 80 dollars. Store prices run around 125 locally.
I have an Ishapore Enfield 2A1 in 7.62 Nato, good for 2" moa, maybe better with the right ammo. This one was 150.00
The SMLE Mk4 No1 in .303 should be able to do as good as the 2A1 but it's not been shot yet. It's a Long Branch and in very good condition. This one I paid too much for. Should be 300 or so if the metal and wood are perfect. If it's in the mummy wrap they are more but those are for closet queen collectors.
I picked up a M1917 someone had professionally sporterized to be near identical to a Remingon Modeld 30 . The model 30 is is a post war rifle using unissued miltiary parts. I paid way less than the *stock* is worth. It shoots extremely well and I suspect with better ammo it will do better than 1moa. It's in .30-06. An equivalent used one will run over 400, with the stock this one has add 200. It's a very pretty rifle.
For self loading rifles
An SKS properly cleaned and checked is a good first rifle. I have a Yugo that does ok and I can shoot golf balls with a Bloom Automatic.
They can be 'minute of pie plate' or better it's something of a crap shoot. You can research ways to give it better accuracy and reliability without spending a fortune with some effort. These should be under $150 in excellent shape, shooters maybe $100 if the bore is good.
The AR-15 is hard to beat for accuracy, accessories, parts and reliability. You can get them now for around 800 or so. I like my flat top varmint variant but that's a bit more money and it's a bench gun cause of the pig heavy barrel.