If the OP wants a laser beam of a caliber, the 260 or 6.5 CM isn't it. Nice caliber, and I use a 260 mostly, but for flat shooting I'll grab my 220 Swift. But, for the OP, I'll again suggest a 243 with 55 gr Nosler Ballistic Tips at approx 4000 fps. Sighted in at 200 yards, he'd be down 5 inches at 300, 15 at 400, and only about 30 at 500. Then, when deer season is on again, he ramps up to 100 gr bullets. It's a good all around caliber, and if I didn't already have a 260, I'd get a 243.