I will post the results tommorrow after the range session to help dispell the mythology and help everyone better enjoy these AWESOME rifles
Please don't get me wrong here, as this is just MHO, nothing more, and your cause is noble.
I see no mythology to dispell. It is proven on this forum that each combination of 15-22 and shooter must be different when it comes to ammo. As an example, I have had nothing but trouble with CCI tactical ammo (failures to feed, bent between bullet and case), but absolutely flawless operation with Winchester 555. Others agree, yet others like yourself have had flawless operation with CCI tactical, and others have had issues with Win 555. I have run el cheapo Remington Golden Bullets with no issues, and had CCI Mini-Mag cause issues (not many). Others won't go near Rem GB, because they have had issues, and swear by Mini-Mag.
Just because a particular brand/type of ammo works well for one shooter, in his rifle, does not make it the "beat all to end all," nor do failures on any brand/type for one shooter make it an ammo to avoid. It all boils down to personal preference and what works well for you. As I said in the preface, it's just my opinion.
Another area is availability. many have posted they really like Federal 550 Bulk, and get it from Wal-Mart. Unfortunately, in my area, Wally World doesn't carry it, and I can't find it online. Perhaps someone could point to an online source. If you Google "Federal 550," there's not a single online seller listed. If you click on "Shopping," nothing close to federal 550 comes up.
In any case, good luck with your test, but I'm afraid it will only show what works well in your 15-22, with you as the loader/shooter, but will not prove anything other than that, and not disspell any mythology. Just MHO, and thanks for letting me rant.