I had several firearms to test fire this morning. Among the bunch was an unbraked, 7.5lb, 300 RUM I needed to function test the extractor on. I didn't have a scope on the RUM. When it came time to fire the RUM I looked around for something to point at. There was a white rock on a nearby hillside, size of a stop sign, previously ranged at 320. I shouldered the rifle like a shotgun, letting my brain and finger work without instruction. The hard smack of the RUM hitting rock rang down the canyon as a cloud of white dust exploded off the surface. Grinning, I repeated the operation several times. I was tickled to hit the rock about 7 out of ten times. Who needs a scope?