I really tried to embrace the whole process of finding an accurate factory round from my Winchester M70 300WM. Why factory? Because I’m not a range nut and I’d rather be riding mountain bikes or skiing than picking up powder grains with a tweezers. It took seven boxes of well-reviewed ammunition, all with great reputations for penetration and weight retention. I tried not to care about bullet construction, other than wanting bullets that were known to stay intact and penetrate.
Barnes TTSX and LRX bullets shot pretty well. Hornady GMX shot better. Nosler Accubonds and E-Tips, for whatever reason, shot poorly. Same with Sierra Sirocco II’s. My guess is my barrel likes grooved bullet shanks. But I can’t be sure. Federal Trophy Bonded shot second best; very consistent 1in groups at 100yds. What shot best? Federal’s Trophy Copper. And it frankly wasn’t close. It was almost always 0.75 MOA as long as I did my part from the bench. Then I took it to a buddy’s farm and got a box worth of LabRadar data on it. The ES was laughably small for a factory round, something like 18fps if I remember correctly.
From there it was easy. Run a Strelok Pro chart for my rifle, scope, zero conditions, and the round itself. Take a screenshot and print it out and tape it on my stock. Use a rangefinder with the ability to compensate for angles. Then I bought 200 rounds and voila, elk medicine for years to come.
I’m not saying my process is genius or foolproof. But at my own comfort range based on my own skills and practice (350yds), I feel very confident that the round will impact where I point and the bullet will do the job.
All this to say, do you research, spend some coin on good factory ammunition, get the data and learn your dope, shoot until you’re comfortable, be honest with your skills and ethical hunting range, and go hunt. It isn’t rocket science. I’ve learned far more about elk hunting from elk hunters than ballisticians.