I bought one new in about '90. Dunno if it was one of "the" long throat jobbies, but it did have an extremely long throat. I forget just how far I had to seat out the 140's but there wasn't much bullet left in the case.
I also can't forget however, that I could load about any medium burning powder (IMR and H 4350, 4064, 3031, H414, 4895, you name it) in there with 140 grainers and they all gave from 2800-2850 fps and shot about 8/10". That of course after the action bedding and barrel float those Rugers seemed to need.
It was a nice rifle I wish I still owned.