If there is one thing I've taken from this forum it would be that there is a ton of helpful advise, and some good people who want to help in any way they can.
Not everyone will agree all the time, but there is enough valuable information given that holds a lot of fact, and you can then use your own educated judgment as to "what might just work!"
Like Partsman said which I tend to agree, is just clean it good, and shoot it!
If you are having problems getting a group you then follow the steps listed in the FAQ's until it's shooting the way you want, and if that fails you can post again for help, and someone will come up with the answer to your questions.
I've had good luck with the two Handi barrels I've owned, so I'm sure if they weren't to my liking I'd be doing a lot more than just shooting it.
Ammo isn't cheap nowadays, so that is something to consider.
Hope it's going to be a good one, and keep us updated as to how it goes!