A Dealer told me that most people use too much grease, and they need to learn to only put in enough to do the job.
I've gone back to manual pump grease guns. I have one with a solid tube and another with the flexible tube. I use the solid tube for almost all my fittings, which is fast and easy.
I've tried a few different brands of manual grease guns but haven't really noticed much difference in them. For most of my fittings, I only pump it a few times. I've been doing it so long I just sort of know when to stop so grease doesn't come out of the seals. Some might get 2 pumps, others get 5. On my backhoe I have a few places that get ten pumps, that's my most extreme fittings.