I have a 300WBY 6.5-20 Leopold mill dot with bipod. Ballistics cards sighted in at 200. I don’t feel comfortable on anything past 300 without perfect conditions and I always use a spotter with a range finder a ballistic card and knowledge of the rifle, quarry, and my ability. I took a mule deer at 165yds this year. With said spotter. Shot was within 1/2 of an inch were called for. Multiple trips to the range and $100 in ammo before the hunt.