Step one: throw your bore scope in the deepest darkest hole of your closet you can.
Step 2: go shoot the gun and let that be the indicator of firearm function.
Bore scopes are cool and all but people get way too wrapped up in what they are seeing. It flat out doesn't matter what it looks like if the gun shoots.
Also, BP and BP substitutes are very corrosive. If left uncleaned they WILL cause pitting. Doesn't mean they still won't be accurate rifles, it just means you gotta be more proactive to keep them from getting worse.
Go shoot that thing and report back
