Not really relevant to your question but for many years I shot a Hastings .665 with WW Supreme High Velocity # 5's with great success. I shot that combo from the time the shells were introduced up until I finally switched over to Hevi-13's and an Indian Creek. I would not hesitate to use that load again. My gun by the way is an 870 3".
John
Yea man, that is what I shot from the late 80’s until the Hevi Shot craze came about.
Rem 870/ 21” bbl with the Hastings .665 with a bunch of different 4’s,5’s and 6’s. The Federal 3/2/5’s (Blue Box) and Activ 4’s, 5’s were serious out of that set up. Interesting how myself and many of my friends have gone back to a similar lead set up. Friend of mine shot at a turkey 3 times to kill it this past season with a hot rod turkey gun and shells. I asked him how that felt to shoot $36 dollars worth of shells to kill a turkey. Missed twice up close. First shot was 18yds. With a lead set up that turkey would have been dead on the first shot.