Kevin Cram has a fixture to turn the (BAS) Bolt handle hex head screw down on a lathe instead of grinding on it. I think he turns mine down .110-.112"s when I use the Stockade Lift kits. I think he charges $5.00-10.00. Here's his info:

Montour County Rifles
216 Shultz Road
Danville, PA 17821

570-437-2010