Way back in about 1987 I had a 1917 Winchester with a sewer pipe for a barrel. It shot patterns w/ normal 150 gr. bullets. However, with 180 gr. Hornady spire points it would do 2 inch groups. And, with one particularly nice box of 180 gr. round nose Hornady bullets it shot a number of 1 inch groups. Zeroed it with a little tap hammer, a sacrificial brass cartridge case and a couple of toothpicks. Used the toothpicks to get a bit of upward barrel pressure. Centered the group with a bit of tapping using the tap hammer and the base of the sacrificial cartridge case to avoid marring the front sight. Dog gone rifle shot lights out! Easily hit a milk jug way beyond 100 yds. Wonderful shooting rifle. Sincerely. bruce.