I've been known to shoot 3 1/2" shells out of my 870 Supermag but I don't shoot it in the summer with a t-shirt on. The first time I shot my Omega with 100 gr. loads my shoulder was black and blue. I put the sims pad on and that stopped. It's not the gun but the cheap hard rubber recoil pad T/C uses. They give very little. As for the foam that's for sound issues and not weight. Hollow stocks sound like a drum when bumped IMO. By filling it with a lightweight spray foam it deadens the sound. Every hollow stocked gun I've had has gotten that treatment. It's a cheap fix.