I see nothing wrong with your rifle, caliber choice or load. I probably would use a different bullet, but thats just personal. Your results speak for themselves. I don't pay much (read that as any) attention to those "experts". I kind of feel the same way with most of the stuff that I see on Utube.
I use most of the published load data as a guide. In a modern rifle I would push cartridges like the 7 X 57 a little more than most factory. With more modern cartridges I don't try to hot rod them.
My load for my match rifle in 6.5-284 is over most of the listed book max loads. Its been used by a lot of competitors and I approached it cautiously. Its a custom action thats very smooth and would be easy to feel if the bolt lift became sticky. There are no pressure signs on the primer or case head. Case head expansion never approaches .001. I'll shoot the same 40 cases for an entire season, so case life is normal.
