After a couple of shots at the range, take your wrench and break the seal on your breech plug. You don't have to take it out, just break the crude seal, then snug it back up. You can shoot all day, and it will still loosen easily when it comes time to clean out.
Be sure to use a good grease on the threads of your breech plug, and don't over-tighten it when you put it in after cleaning. That is the #1 thing I see people do, that makes your plug hard to remove. All you need to do is just snug it down.
This will help.