Some folks have been using grease gun for years and keep fighting the connection between the gun tip and the zert. Here's a short video to overcoming that problem.
Agreed.The knurled-portion is to provide gripping-surface to twist the barrel CW or CCW to loosen to to firm-up the grip on the zerk. Virtually All grease guns have this adjustment….largely unknown to most owners who then seek other tips such as Lock-N-Lube.
Some folks have been using grease gun for years and keep fighting the connection between the gun tip and the zert. Here's a short video to overcoming that problem.
I started greasing our farm equipment many decades ago. We filled guns from a barrel by sucking it into the gun barrel, or bare-handed if you’re a little kid and couldn’t get the grease to pull in. No cartridges.