You can get a Les Baer that's good for 1 1/2'' at 50 yards. But most people are not that good. My Baer is rated for 3'' at 50 yards. They are great 1911's.
I did 155 A-max on a steel plate and held 3 1/4'' group at 1,000 yards. By the way my barrel is a 1 in10. The wind was kind to me. The weapon was a Savage with 24'' barrel. Coming out at 2,847 FPS .