I have used a pneumatic hand-held Snap-On grease gun for the last fifteen years and I like it. Only problem is, if loaded with grease in a cartridge they get air-bound sometimes and it is a hassle bleeding the air out. A few years ago I switched to bulk-loading the gun with a grease filler pump from National Spencer. I buy the grease in five gallon pails. I take care of a few trucks.