The 7x57 looks like a great caliber!
I have been looking for one of the older ruger M77’s in that caliber for quite a while but have not ran across one yet.
I have time and patience one will pop up at some point.
it's probably easier to build a nice 7x57 than it is to find one.
I have had a couple over the years.
a pretty decent Mark-X that had a throat cut for I think 200gr bullets, but still managed to shoot pretty well if I kept the velocity's down to about 2600 fps with lighter 139-140gr jacketed bullets.
my M.I.L. of all people claimed that rifle as her deer rifle after I let her shoot it a few times.
I also had a nice Charles Daly that the wife snagged up then traded in on a stupid Savage in 30-06 while I was gone for work.
Littlegirl stole my tang safety Ruger, which leaves me the Winchester push feed I had built in 7x57 ICL chamber with a 40* shoulder and long neck.
I should have kept that reamer but traded it for a new 7x57Ackley reamer for another project I was working on at the time.
the 7x57 round feeds quite nice from a long action with no real modifications to the rails or anything, but so does the 280 Remington.