Wendyj
I have been following your post and subsequent replies and have to admit that I am somewhat puzzled. I say this because I have been using 777-2F with the #11's for a number of years now, in our SideLock with good results. Oh, we get the normal infrequent Hang-fires and Miss-Fires, during our classes which cause little or no problems. We usually have about 50 students during our sessions. I was not available for our last class and later, one of our new instructors really had problems with this combination. He had no experience with SideLocks and switched to his MML. I just passed it off to lack of experience but now you folks have me wondering. ......
Thanks and;
Be Safe !!!