You are of course correct, it was 1895. Before I originally responded I checked the Winchester site and it didn't list the presure for the round the original poster was using. He also stated that something on his gun was "re-welded",it was generally in not too good of shape when he started, and some of the parts used were hand made. Not knowing what was done to the gun or the presure of the loads in question, I chose to err on the side of safety and say no.
I saw in your profile that you are really interested in these old timers, me too, great fun they are. There are many handloads that are safe in firearms that are in good shape, probably the factory stuff to. The original poster doesn't handload, but he would probably enjoy his gun more if he did...BP smoke out of a 73 is tons of fun...and light smokeless rounds also get the job done.
I'm just very cautious, earlier this year at a levergun shoot, I saw 2 Model 92s wrecked by the same shooter, in 2 consecuative shots. I heard him fire and the noise was not right, I looked over to see him rubbing his face-gas blow back. The gun was locked up tight and I had to take it apart it unload it, the primer was missing from the fired shell, and the bolt was very tight in the rails. What does he do, he gets another 92 out of his truck, a nice carbine, takes another round out of his "baggie" of reloads and prepares to shoot it. I tell him it's not a good idea, probably bad ammo, he persists so I excuse myself and head to the washroom(got outta Dodge). When I get back the 2nd 92 is being taken apart as well. 2 classics wrecked in one morning and 92s as you well know are much stronger than 73's. It certainly was bad reloading on his part but I won't shoot anything out of these old guns that I didn't put together myself, including factory stuff..Just the way I am...
Question, Why does the .38-40 take a .40cal bullet, or Why wasn't it called the .40-40?
Good talkin to ya..