They are the two screws on the bottom that holds the action in the stock.

Basically it is a good idea to check all the screws to see if they are tight. The factories these days seem to not take as much care in final assembly as they should.

Same reason to clean well. Some look like they were test fired and then covered in preservative without cleaning. Gotta get all that stuff out before shooting the first time.

Break in procedure might help. Mine had a pretty rough bore and it was several hundred rounds before it settled down. I regret not doing a break in. Might not have helped, may have saved me firing a bunch of ammo just to get decent groups.