I took my .45 apart and oiled it yesterday. I put an aluminum .22 caliber cleaning rod over the tip of the spike and pushed down on the handle. I had to tip the rod slightly to allow the barrel bushing to turn, and reassembly was the same. I used the same little bit of steel wool as before to shine up the spike when I was finished.
Besides this pistol, I'm taking my Contender with the 9" .223 Remington barrel on it next weekend. Along with the pistol, I'm taking a .22LR - .223 Chamber Adapter, a tin of 14.4 grain Crosman Copper Magnum Domed .22 Pellets, and a box of 100 Ramset CW Series .22 Powder Loads. These are the Yellow Level 4 loads, the highest power of the 3 levels available in .22 caliber. The Winchester W stamped "blanks" drop right into the adaptor. Unfortunately, the pellets fall right through. I may poke a small bit of toilet paper in before I load the pellet, then push both forward with the powder load when I chamber it. I just tried it with 1/16th of a sheet of toilet paper and it's like a self-contained cartridge as long as it's pointing down.

Since the chamber adaptor will stay in the gun the whole time, it should work just fine. The tip of the blanks are small enough to fit partway into the skirt of the pellets keeping them centered and positioned as close to the breech as possible.