With a M1 Garand you have to be careful not to get “Garand thumb”. Don’t ask how I know.
A properly timed Garand won’t do that. There are four main parts that control/affect the timing: Bullet Guide, Follower Arm, Follower Rod and Operating Rod Catch. Then there’s the timing block insert you can use to verify proper operation.
I was issued a Garand M1 in Basic back in the fifties. After I cleaned the Cosmoline, I looked through the barrel. All the riffling had been shot out. It also had the trick of the sight dropping down a click or two after each shot so I saw puffs of duct walking down the berm. Sort of turned me off Garands. My psywar unit in Korea were issue carbines. Some years ago the American Rifleman had them advertised very cheap, but I passed them by. Did pick up a couple of Swiss K31s because of their accuracy.