I'm having similar problems. Mailed back my BA to John 1st time because I was having feeding issues, getting brass shavings at 6 oclock of chamber. I had allready recieved a new tensioner from Ray which helped, but didnt completely solve so I sent it back to John. He modified the chamfer a little to improve feeding, which it did. However, I'm now getting light strikes every 3-4 rounds. Hes thinking this is the result of the larger feed cone. Ray at zermatt was thinking maybe the trigger (TT 2stage diamond), but I have my doubts since it was firing perfectly before the modifications, just fed like crap. Sent the BA back to John late last week, not sure what the next step is.Guess I’m going to have to contact them. Having about 40% lite strikes also with a TT Diamond. Guess it is a little let down after having a good run with a pile of rimfire purchases this year.
However, I will say both Ray and John have been super helpful through all this and more than willing to help, even though it seems like everyone is getting frustrated.