ampoule

Why would one go with Durabolin vs. Deca Durabolin on a cycle combined with Sustanon 250 and Winstrol? What are the advantages/disadvantages? The Durabolin is sold in 25 mg ampoules, so it would take 16 ampoules to get 400 mg of it weekly. That's a lot of ampoules at $6/piece. Whereas Deca...

This seems to be a untalked about topic unless I just couldn't find anything on it. I've never used ampoules before, so can someone educate me on the correct, sterile process on pinning a compound out of an ampoule?