Sorry, not been on for a few days... The metal clips get a real good grip of the rubber, but I’m afraid I’ve never shot much over .7mm so can’t really comment, but I can say I should imagine they’re up to the job.
I have both the plastic clips and metal clips and both do the job. Metal clips are more bulky but will last a life time. You can buy the clips from pro shop catapults, but they are a tenner plus p&p.
I really like the scout lt, it’s very pocketable. I prefer to shoot it without the scales though which allows your fingers to clasp through the hole.....it’s a lovely catap