Look at the rear of the forend when you take it off. Any dark areas on the inletting indicate pressure on the front of the action. Use a small, fine file to take these off.
Often accuracy is helped by epoxy-bedding the front inch of the forend. This stabilizes the forend from wobbling back and forth with each shot.
If you can't see ANY space between the rear of the quarter-rib and the action, even if you hold the rifle up to a strong light, then relieving the rear of the rib usualy helps a lot. If you can fit a sanding strip between the rear of the rib and the action, that's plenty of clearance.
