I agree buddy. It takes from the enjoyment, and test our willingness to take on newcomers. We older ones expire and another group hopefully will pick it up
Runner you might plug that hole with a screw and ruck more grease in there. It most likely is a cone shaped bearing, like a wheel bearing. If you could get to it to pack it, be good packed for a long time
No if it’s stopped up you couldn’t pump it, providing it’s a good primed up gun. Sometimes that’s a big area to fill. So you should have judgement to get a feel of what’s happening. Good luck and keep on trying