I am curious, did your Henry manual have a line...in bold print...(that almost seemed like it was added in later somehow...like squeezed into new manuals) that said ""do not use CB Short ammunition"?
Mine did...and I thought that was odd, because 22 Short is exactly why I have so many tube mag 22's! I love the snappy little CCI HP varmint rounds. They work great in the Henry, and it holds like 20 of the little buggers...
My 10/22 eats just about anything in the stock box mag, with the aa922 mags it only seems to likes CCI Blazers, and with the GSG drum it eats Federal bulk (no wax coating/Blazers) and or Winchester target (555/333)...