I fired my 1927 A1 with the EZ pull springs the other day. The only problem I had was a misfeed of the last two rounds from one of my XX mags. The other XX and the XXX fired all rounds, but the bolt did not lock back when empty. I was firing reloads with 230gr FMJ above 5.3gr of Universal. I will try the offending mag with factory rounds the next time I take it to the range. Also, the gun is still new with only a couple hundred rounds through it. I am hoping for it to improve with time. The new springs did make firing the gun more enjoyable since the bolt was much easier to cycle manually. Don, Should I put the 'gorilla springs' back in for a while during break in? Thanks Bill Edit: Changed 5.7gr Universal to 5.3gr