I've got peeps on 3 rifles, a Model 1903 Mannlicher-Schoenauer chambered in 6.5x54MS, a Winchester Model 1984 in 30-30 and a Marlin Model 1895M chambered in 450 Marlin. Peeps are very effective and many people overlook them when they need a short range tool. I've used them in the military and up to 200 yards or so they don't give much ground to a scope. Beyond 200 yards they start to loose effectiveness because the scope allows more precision in aiming at distance.