Hi guys I was wondering about any experiences wth this choke. I have a Remington 870 mag and also a Rem SM both 12 gauges. I went to buy the .660 but the only one they had was a .655 I just hope I didn't make a bad choice!. I plan on shooting lead #6's but mostly Heavi Mag Blends, and Heavyweight #7 all in 3 inch mostly. THANKS!