I decided to clean the whole thing again including pegging all of the jewels. I used peg wood and also a smoothing broach. When I was cleaning the upper great wheel jewel, I heard a faint noise and noticed some debris. What I thought was dried oil turned out to be flaked jewel. I am not sure if the broach caught on something or what why it didn't happen when I did it before. I didn't see any dried oil or debris under a 60X scope. But here is the broken jewel.
I had to order a new jewel and pressed it in with my jewel press and checked the end shake. I also decided to replace the great wheel since the jewel cracked and I saw some minor scoring. After all of that was done, all of the train wheels were truly free. Whew!
After oiling it again and doing some minor adjustments, I was able to get these results.
I still don't know why the amplitude isn't higher since I see 290-300 degrees frequently in magazine articles. But I also don't know how old this particular movement is. Overall, I am pretty happy with an average amplitude, a delta of 6 seconds, and an average rate of +1.3 seconds. Thanks for looking!