My experience in bench shooting single shot rifles has brought me to this general rule of thumb. If the rifle has a straight-line bottom on the stock you can shoot it free recoil just putting your shoulder close to the butt to keep it from coming off the rests. If it is a sporting or perch-belly schuetzen stock you must put your shoulder into it to control the recoil. Every rifle is different and I am sure that some out there will tell me about their schuetzen they free recoil but in general that is how I approach a new rifle.

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