I have a Model 10 in .223 with an 8 twist McGowan barrel so that I can shoot heavier bullets for long range chucks. When I load 75 gr A-Max to magazine length they slip right into the chamber with no problem. I've been trying to chase the lands with 77gr Nosler CC HPBT and can't get them to feed unless they are seated deep. From the ogive of the bullet they are over 1/10 inch from the lands. By loading a bullet slowly from the magazine the meplat of the Nosler catches on the very bottom edge of the chamber before the case shoulder touches the feed ramp. Research tells me that tweaking on the magazine ears is a looser. I'm wondering if a couple of small dobs of epoxy on the face of the ramp to effectively move it back just a bit might work. That way the case shoulder could ride up slightly to allow the nose of the bullet to lift into the chamber.

Any ideas?