Netting - tagging gun troubleshooting

Hey Vineyard folks, we are a couple days into netting our grapes and we are already cursing our tagging guns. The most common issue is the tags get stuck and then nothing comes out, or 2-3 come out at once. Sometimes we need to remove the needle 2-5 times a vineyard row just to get the jammed tags out.

As pictured using Avery Dennison MARK III tagging gun and 1/2" tags. Gun and tags are brand new and out of the box today.

Any tips? This is super frustrating and time consuming...(And we are only a couple days into a couple weeks of netting/tagging).