Just for the record. I didn't pull the idea out of the blue of coil springs being a bad idea for locks.
I had a GRP LH flinter that wouldn't hold powder during a hunt. I called up L&R lock to see if I could get a replacement lock. I got the owner on the phone and must have caught him when he felt like talking. We must have talked for an hour about locks. That's when the subject of coil springs came up and he thought they were a bad idea. We discussed why, and that's what I passed on in this thread.
So, if you disagree with me. You're also disagreeing with someone who makes locks for a living.
Just saying.