i have a M77 in .458 lott and it shoots very well. recoil is manageable and it shoots to point of aim. it points well and is quick to get on target. i like it better than my previous CZ550 american safari, but i am a big fan of M77 rifles. i have never fired a #1 in a heavy caliber. the only loads i have tried in the M77 are 500 grain hornady.