The one with windage issues is more than likely a scope or rings issue, just replace them temporarily and see if that helps, if it does then try replacing the scope or the rings and test to isolate which is the issue. Now if it was a Savage I'd say take the mount off, put screws in the holes and lay a straight edge against the screws and see where it points. I have a new ish 17hmr from them that the straight edge is well off the left side of the barrel end. Luckily the scope has lots of windage, lol. Shoots tight but clearly whomever drilled the holes had too many martini's at lunch and there was no QA done before it left the factory.
The one shooting 55gr it might like them it might not and you might try another 55gr and it might like it just fine. It's almost certainly a 1:14 twist if it's a factory barrel, I have 22-250 and 220 swift, two of each and the 22-250's are fine with the 55's but the Swifts don't like em one bit but love 52gr, my old M77 Swift was the same, hated 55's. So there's that. I love my No. 1's, all six but each has their own temperament, especially with factory ammo. Lots of people say if you don't reload then get it on paper, buy a box of everything you might be ok shooting through it and see what it likes, then buy more of that. I've heard and read that regardless of cartridge, just need to find what it likes. None of mine like Hornady ammo, most like 20yr old HSM better, like twice better. I reload so all those issues become new ones and ones I can actually control.