Nice test, if you do plan to do upgrades, be sure to keep the results to show improvements. That would include a new barrel, trigger, stock....
Then after all of that, shoot for overall accuracy of the completed modified rifle VS stock rifle. This could help others decide how far they want to go and how much money they want to spend to get there.
Keep the thread going, it's definitely a great start and will get better as you get towards the end. It's always good to watch these threads and to see how things turn out. So far you're doing a great job showing what you're doing and how little changes affect the accuracy.
I don't want to throw a bunch of questions at you about using different ammo, bench rest... if other people want that, have them send you the ammo they want to see tested!!! That's how they can help you keep testing and posting to the thread right?!
Anyway, great job so far!