The original flying ashtray was the Speer Lawman 200 grain JHP. It was not loaded to +P pressure. I'm not sure Speer makes it anymore now that they have the excellent Gold Dot bullet.
I have a few left over from a box someone gave me about 15 years ago. I had several FTF while plinking with them so I carry either Winchester 185 grain Silvertips or Remington 185 grain JHP, both of which function 100% in my old Colt using Wilson magazines. The Silvertip was one of the first high performance .45acp rounds on the market. It's a little out of date now but it still feeds as reliably as any modern JHP, and it expands better at the lower velocity you get from short-barrelled guns than most of the modern gee-whiz JHPs.
I went down to the gunsafe and looked, I think you are right they are 200 grain. I still have some of the old stuff. The +p 200 grain hollow points are about 10 years newer. I couldn't lay my hands on the box so I'm not sure about the manufacturer but they used the original speer hollow point bullet loaded to +p pressure. I don't know if you can find this round anymore but it was one of my favorites.