1. Put boolits into holes in the round thingy
2. Point at what you wish to shoot.
3. Pull trigger (that little thing sticking out from under the little round thingy) until it stops going
BOOM
4. Go back to step one and repeat.
Be careful cleaning the titanium cylinder though. you don't want to breach the coating.
I have a 337 and aside from a little hoppes and a nylon brush to get the loose crud off, I do not agressively try to get every bit off of it. A little carbon just adds character