RE: Federal Heavyweight vs. Hevi Shot
You experience may vary.
Hevi -13 likes alot of choke. Think as tight as lead and a bit tighter. Rem hevishot and the fedreal HW tend to like it a bit more open. Also for the most part the Federal HW does better in nonported chokes. But you never know. The Win Ext. Range shoots well in the same choke as lead.
If you can get the Fed. HW to pattern it'll give you the best downrange energy as it's quite a bit heavier than the other options. The new HW 7 shot loads should be killer as they retain the same energy as #5 plus a bit extra. That's alot of shot!