Some ABC's can be really tight although my Rossi wasn't quite that tight. However you should never turn over a new ABC slowly especially if it's only got the storage oil in it and no plug. Having the plug in lets the compression load the con rod so the piston doesn't go quite so far up the liner and then helps push the piston back down. Turning them slow just squeegees the oil of the liner (dare I say that castor will stay there longer??)