Isn't the 66 the one that has the tendency to fire 2-3 shot bursts over time? I know my cousins had a 22 semi auto with a plastic stock ( I just assumed it was a Nylon 66) and it would shoot at least on 2-3 shot burst per magazine. Cyclic rate has to be in the thousands per minute as it is almost imperceptible. Sure wish mine would do that 
"Allways speak the truth and you will never have to remember what you said before..." Sam Houston
Texans, "We say Grace, We Say Mam, If You Don't Like it, We Don't Give a Damn!"
~Molɔ̀ːn Labé Skýla~
| 
