Hey Jim C., I too have a rifle that can hit a golf ball at 300 yards!
Only took 6 shots! The rifle was already sighted in at 300 yards from a previous mess'n around session. The first shot was the one that clipped the 9 ring at 5 o'clock. It had not been cleaned so I fired a second shot w/o adjusting the scope setting - it clipped the 8 ring at 7 o'clock. When up six clicks and hit the 9 ring on the left. When right 5 clicks and up 1 more and hit the 10 at 2 o'clock. So back 1 to the left and I was there.
Hit that golf ball at 4 o'clock. It jumped up and left about 15 feet. Figured it was shot all to pieces. But found just the small dent where the bullet hit it and the cover cracked around to the backside where it exited. I realize it was only a glancing hit but that is one tough cover on the ball! I'm going to keep some golf balls in my range box and keep trying to get a better centered hit.
Saturday at the range was fun.