Apologies to you experienced reloaders and to Hornady if I've misinterpreted something obvious, but I thought it best to post this in case someone else out there is about to make the same mistake (I think) that I nearly did 
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My Hornady 7th edition reloading manual, on page 898, states the minimum and maximum loads for 45 ACP using Win 231 over a 185g JSWC bullet are 5.9g and 7.2g respectively. My Hodgdon manual cites these as 5.0g and 5.9g respectively,,quite a difference.
Now, the Hornady manual, page 898 shows 2 different 185gr bullets above the load data, with 2 different C.O.L.'s , one being 1.135" and the other 1.230".
According to my Quickload program, putting 7.2g of Win 231 (MAX) under the 1.230" cartridge should give a chamber pressure of 20,413 psi. This is high. Putting the same (MAX) powder under the 1.135" cartridge gives a chamber pressure of 28,385 psi. This is a lot higher.
I could be wrong but to me it looks as though the Hornady load data on page 898 doesn't apply to the 185gr # 45137 FMJ SWC bullet seated to C.O.L. = 1.135" cited at the top of this page. I'm no judge of how hazardous such loads may or may not be in such a cartridge but the data does starkly contrast data for this cartridge and powder listed in other reloading manuals.
.My Hornady 7th edition reloading manual, on page 898, states the minimum and maximum loads for 45 ACP using Win 231 over a 185g JSWC bullet are 5.9g and 7.2g respectively. My Hodgdon manual cites these as 5.0g and 5.9g respectively,,quite a difference.
Now, the Hornady manual, page 898 shows 2 different 185gr bullets above the load data, with 2 different C.O.L.'s , one being 1.135" and the other 1.230".
According to my Quickload program, putting 7.2g of Win 231 (MAX) under the 1.230" cartridge should give a chamber pressure of 20,413 psi. This is high. Putting the same (MAX) powder under the 1.135" cartridge gives a chamber pressure of 28,385 psi. This is a lot higher.
I could be wrong but to me it looks as though the Hornady load data on page 898 doesn't apply to the 185gr # 45137 FMJ SWC bullet seated to C.O.L. = 1.135" cited at the top of this page. I'm no judge of how hazardous such loads may or may not be in such a cartridge but the data does starkly contrast data for this cartridge and powder listed in other reloading manuals.
