You are right, Carnocker, gunny, word of mouth is not the way to get load data. Neither is assuming that all .45 semiwadcutters are knockoffs of the H&G #68 which loads to 1.25" OAL. They do come shorter.
I don't think it reasonable to expect published load data for every dinky brand of bullet, you are going to have to do some thinking.
Charles, I am concerned that you say you are seating to "just above the shoulder on the bullet." That would mean to me that the shoulder was recessed into the case. Which I saw done in a magazine article once. Ugh. What I hope you mean is that you are seating just BEHIND the shoulder of the bullet, with .020-.030" of shoulder ahead of the case mouth. If so, and that gives a 1.193" OAL, then you have a 200 grain SWC with the shape of the factory match 185 grain SWC. Data are not interchangeable, because of the difference in weight and seating depth.
Houston is right, seating depth is important to pressure development, OAL to feeding. You would probably do well to look at load data for a 200 grain JHP. Most of those load up shorter than a #68 style SWC, in spite of the hollowpoint full of air taking up length. The Hodgdon maximum for a 200 grain JHP is 5.2 grains of Titegroup. A load of 4.2 grains would be a reasonable start on a target load. Do you have access to a chronograph? A fast load is probably a hot load.