I shoot the Carlsons in my 20 ga. Remingtons. Fact is, I've tried them all. In my guns the Carlsons .575 non-ported gives the best hunting pattern I am looking for. Shoots the Fed. 7's extremely well, couldn't ask for more. Have killed several birds at ranges we don't talk about here. Very consistent shooters. Sumtoy shoots great but is a tad bit tighter than what I am wanting in my setup.