Been shooting a Undertaker .665 in my Remington 11-87, now that i gone to using Mag. Blend, I have to go to a choke tube designed for heavy shot. If i stay with the undertaker i have to go up to the .675. I have had great patterns out of my .665. I was considering a Jelly Head .665, but they are hard to find, even the website only lists the .660. Have they quit making the .665? Has it had problems? Need to get a good set up but not wanting to purchase 50 chokes and throw 49 of them in the cabinet never to use again. Any help would be greatly appreciated pros or cons.