When you chamber a round manually does it fire? If so and it doesn't fire the next and subsequent
rounds then the toggle isn't going back far enough. Does the toggle lock down after each shot or do you have to push it down in order to fire?
The first is too weak ammo, too strong mainspring,or both. The second is too weak a mainspring. Try different types of ammo, look for some 124g. Little heavier bullet makes a difference.
rk
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