Used a M77 SS/SYN in 204 for a few years. Trigger Job and reloaded some 35gr Bergers. 20" tube and it shot GREAT! My 338RCM was a Hawkeye. I had that sucker shooting 1.5-2" groups all day long. Restocked in an MPI and bedded, Trigger Job and a new crown..... and the groups shrank to 1.5-1.75" groups.
Go figure,
