I talked to Carlson's today before I bought the choke and asked if I could also use this choke to shoot BB or #4 buckshot for coyotes and they said it would be fine, and pattern similar to their Coyote Choke at longer ranges. My factory Rem. extended, extra full choke is about 30" @ 30 yrds. w good density in the middle, the ported Blackout choke is 5/8" or so longer than the factory non ported choke. I will be patterning it tomorrow w as many different loads I and my 78 yo daddy want to shoot and will post some pics soon. I was impressed how fast I was connected to a technician @ Carlsons and how he answered my many questions. I'll be shooting old school rounds in the 1187 nwtf and maybe a #4 LBXR in my NEF 28" full.