Welcome to TFL.
Your on the right track. Try different bullets first. A different trigger won't hurt, and may tighten things up a bit. If you get the new stock it might help group size. If it makes it worse you can bed the action to get it back. Last resort is a new barrel. But you already have a decent group going. I would say that different bullets will make more difference than anything else.
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You can't fix stupid....however ignorance can be cured through education!
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