Hodgdon#26 IHMSA/Silhouette Load Data

I'm a relatively new reloader and I had a question for those more experienced than myself. Ive inherited some old powder(80s-90s specifically Herc 2400 and IMR 4227)and some old and new reloading manuals so #26 wouldn't be the only manual I reference. My question is in regards to the IHMSA silhouette data in Hodgdon#26 circa 1992, some of the load data doesn't specify bullet type at all. For example under Hodgdon powder 45colt info just "240-250 gr", or "260 gr" are listed(page 584). It doesn't specify lead, jacketed etc, which I am used to in modern manuals I have experience loading from. Some calibers and bullet weights seem to specify, and others do not. Is this jacketed data, or was it intended to be a range inclusive of both? I'm trying to decide where to start working up from in 2400 and IMR4227 for 45c, but the Dupont-Hodgdon formula change for 4227 and the Herc to Alliant change on 2400(if any) has me trying to research as much published data as I can. I'd shoot it from a large frame Ruger 45c so even though I don't usually go near the high end of Ruger only(tier3) I do enjoy loads above standard pressure(tier1).