Originally Posted by Golden Horse
Interesting question, I like to ride in French Link Snaffles, and my original ones where eggbutt. When I bought Ace she was going beautifully in it, but then I found out that up here in Canada if you want to ride in a French Link in dressage, it has to be a loose ring. I changed her over and she was horrible in the loose ring. I did some research and found lots of people reporting the same thing.
I can't remember now what the explanation was, but several people reported the same thing I was finding, she became heavy in my hand, and was running through it.
Some horses don't like the jiggling the loose rings give. I tried loose rings (same oval mouth, same brand) on my qh and she went bananas next moment I started to trot. The problem I run into with eggbutt though my paint lean on it and just let me "carry her", or "locked" on it without listening. Loose rings didn't give her a chance to "lock" because of all movement.
It's interesting you can only show in loose rings with french mouth in Canada. Over here it doesn't really matter what kind of rings as long as mouthpiece satisfies the criteria.