Looks like there have been holes drilled in the receiver just forward of the charger bridge too. The wood still doesn't look right, it's too blocky, the #5 wood has a rapid taper from the mag forward. Very slim at the front. It looks sanded because it was cut off and re-formed. The barrel looks right. There appears to be a whole serial number missing. The rear sight should be flat when you shoot the battle sight and there's no adjustment needed. The gap where the butt attaches is normal. This isn't a target rifle but it will be a shooter. They used a much bigger bullet than the 150 so that's part of the problem with accuracy. It'll all work out in time.