Time for a range report .
Sorry if i don't give all specific datas , i'm far from home now.
My first attempt was unsuccessfull . 120 Nosler BT load that worked ok in my friend rifle proved to be a disaster in mine. Other loads were tried but nothing interesting. Bad components or mismatched in cause. My bipod teared the swivel stud from the stock and i didn't brought a front rest at that moment. Real bad session. 140 TSX group at 2'' was my best that day.
My second session with Speer 130 BTSP and Varget went better with just over MOA group.
Then , joy came in when i shot 140 Nosler BT with 45,5 gr of IMR 4350. R-P case and WLR primers were used to obtain that nice group measuring a little less than .6 MOA . 2700 f/s from the tiny 20'' barrel is satisfying too.
I finally got a nice usable load for the next deer season.
The Savage Lightweight Hunter proved it can shoot and will have more of my attention in the next months.
Thanks to all for your great help .