I bought a slick lube tool from Ebay a few weeks ago. It is a small hand-held aluminum cylinder that you fill with lube. On one end there is a port and a piston on the other is a screw driven piston that pushed lube through the cylinder. You insert the minnie into the port and press it down even with the side of the cylinder and give the end screw a turn or two. Then you push the piston up and out pops your maxi or minie fully lubed in the grooves with no mess or fuss. The tool cost me about $20 shipped. The guy has a few more and a search of ebay should turn them up. Once these are gone there will be no more. This is NOS from the 70s. he's retired from Ruger and will not be making any more.