I like my Lincoln power luber for the tractor and bushhog but prefer my pistol grip for my truck. I have blown out a boot on an upper ball joint so now I like to slowly squeeze on the pistol grip. Note I did not blow it out with the power luber but can see it blowing one out before I realize it. A little safer with a hand luber
If you have not done this yet add a couple of long whip hoses to the grease gun and it helps when you have to loop the hose like a snake to get best alignment. One whip hose isn't enough IMO.
I think I added (3) 18" whip hoses. I used a couple of 1/8-NPT plumbing couplers to add the extra whip hoses. Note it doesn't get cold enough here to cause a problem pumping cold grease through 3 hoses.
Another tip I learned via a forum is diaper your grease gun. Wrap a couple shop paper towels (make a coule layers thick fold one or more etc) around the base and tape it on and it will eliminate the oil seperation drips out of the plunger hole.