I agree the Mini-mags so work better in most Mosquitoes. When shooting several hundred rounds at a time there is a noticeable price difference. I do keep plenty of both on hand. Some time back I put together a suggestion of things to do for different problems the older Mosquitoes had. It also pertains to some of the newer ones too. If you car to take a look, here is a link:
http://www.rimfirecentral.com/forums...d.php?t=386450