I have helped several local members get their rifle to shoot the mono's. Have seen seating depths vary from .030 off the lands to a guy with a 270 where the bullet was seated almost down to the beginning of the ogive ( where the full dia. of the bullet starts ) . Play with seating depths to start. If that doesn't work beading may be a necessity. Is your rifle free floated? If it is your next move can be to loosen the Bbl action & slip a thin piece of cardboard like from a cereal box between barrel & stock at the front of the forearm.. If this is to thick 3,4, or 5 pieces of paper can be used. What your looking for is 2 to 3 lbs max upward pressure. If this works then you know beading makes a difference. Another test is to shoot two THREE shot groups. Make sure you give plenty of cooling time between each shot & complete cooling down before your second group. This will tell you if your barrel is overly sensitive to heat up. Take your time & don't get in a hurry.
