Pat, I have heard that some where, but i figured the Rem. Corelocks couldn't be to hot for this rifle, so I got a box from one of my ranch hands and fired about 10 rds. through the rifle, it was about a foot low and a foot to the left, got it zeroed at 100 yrds and put it away, was wanting to know who Shivell is ??? guy i traded for the rifle said it was his grandfathers,and he thought it was to old to shoot. rifle runs great and very clean. rio7