Click, if you can afford it, give the Nitro a call. I got the Economy load, and from what they told me, it would do better in my Ventilator choke(.655) than it would in my Tru-Glo(.665). I don' t know what the constriction is on your chokes, but it seems to me, at least, the .655 constriction works pretty good with the Economy load. My neighbor has a Hastingschoke in his Moss, not sure of the number though. His shoots pretty good with Fed. #5, 1 17/8oz I believe.
You got put on your back? Man, I' d hate to have a tree behind me!