Yep. You need to stay under 600-yards
Okay. You're looking at a Rem Mod 700 with blueprinted bolt and lugs in 300 Win Mag. The Canjar single set trigger goes at 3 pounds unset and 1/4 pound set. The barrel is H&S Precision stainless in 1/10" and it's been cryogenically stress-relieved. The tube is fluted and has a JS Brake affixed for sound suppression. The stock is H&S Precision, aluminum pillar bedded with glass fore-action bedding. The bottom metal is steel H&S. The scope is a Schmidt and Bender 10x PM II .5 centimetric. The S&B is detachable on a 20 MOA rail because the other optic that often gets attached is a AN/PSQ-20. This weapon has been contractually deployed on multiple occasions in SW Asia. The bullet is 190 gr. and the MV is 3050 fps.
Trust me son. To hunt ethically, you need to stay under 600-yards. Deer, elk, caribou, antelope, wild sheep--I hunt them all about every year--do not stand still like people do, and they have a bad habit of moving right when you touch the trigger.
Your 140 gr. bullet weight is on the ragged edge of not not being heavy enough. The retained energy at 800 yards is marginal. Also, you do not have a .7 BC. Period. You don't have it with a G1 or G7 drag coefficient. Using a factory trigger on a game animal at long is unwise, and in fact, unethical.
Listen to me or not.
Bronc