I’d either call sumtoy tell him what your after or try to find a 660/665 Indian Creek…either one on swap chokes for you to make sure your happy and getting what your after.
Your red dot issue is more then likely you switching chokes..Anytime you switch a choke and or load do not expect the same out come..Hence the old saying pattern your gun before you hunt..I have red dots my self…I’m not a huge fan but if the gun don’t shoot straight or can not be fixed with tru glo sights a man don’t have much choice.
Can’t say a lot on ammo..I load myself..I don’t trust anything federal sales from the chasing lot number days with the fed HW shells..Longbeards killed turkeys when they came out and will still do it 10 years from now..Sad to say but a quick search on here shows that the quality of the shells really went down hill after the first year.
I’d recommend foxtrot ammo if I had to buy a TSS shell