I might suggest that you disassemble it again and coat the moving pieces with layout fluid and dry fire it about 15 times and then CAREFULLY take it apart again and see what is hanging up. This is not a normal 700 problem regardless of what it is!
I haven't heard of a delay but light strikes I have seen. This can be caused by fouling and or contamination inside the bolt. I strip them and the chuck up a wire brush in a drill and give it a good cleaning inside.
