If stock photos are to go by, your Winchester 1300 Defender has a traditional stock which places the recoil above the point of interaction with your shoulder. Basically, like handguns if the force generation is above your point of control it creates a lever effect. Straight, in-line stocks like the AR-15 inherently help with recoil control. That’s why the Keltec has less muzzle rise if anything.
If stock photos are to go by, your Winchester 1300 Defender has a traditional stock which places the recoil above the point of interaction with your shoulder. Basically, like handguns if the force generation is above your point of control it creates a lever effect. Straight, in-line stocks like the AR-15 inherently help with recoil control. That’s why the Keltec has less muzzle rise if anything.