I have a heavy grease from my Dad. The gun itself weights about 5lbs empty and I have not had any issues, with it other than it is a beast to control. I have to use one hand to hold the nipple and than do this thigh master thing with the tube and the pump handle. Also it does not accept a tube you need to load it, which can be messy.
The other thing I have noticed is that the grease tubes have different sizes. Some manufactures don't make the grease in a tube that will fit a larger gun.
"Keep talking. I'll keep analyzing."
"Bad decisions make great stories."
"40's are only to be sold at estate sales." - Uncle Ben
'72 FJ-40 - 33's, F&R Disc Brake Conversation, rear ARB, sliders, Winch.
'96 FZJ-80 - Borla Exhaust, ARB w/ M8000, OME 3" lift, sliders, 305 BFG KM2, 4.88's and ARBs, and usually dog hair.