Ever make it to Final Flight ? You can use thier range and try thier chokes that is available, buy targets individual shells to see what suits you the best !! Saves not having to buy a box at a time
With my X3 (26") forcing cone lengthened and barrel polished I shoot Nitro Rays straight 7's with a jellyhead .670 !! I'll post some pics for you.
The nitro's are high but worth it IMO, sighting in is the most costly part but if u go the FF route it helps and I think you will be satisfied.
this is one I did at FF trying out the Nitro's, first shot with the JH .670 30 yds, a little to the left but I fixed that when I got home.
These were after I got home, 40 yds same target just a front/back pic because I didn't mark them so they can be seen easily.