Mr McLeod -
Nothing wrong at all here. Allow us to point out some issues that are holding you back....
• The Lyman book max OAL is 1.090. You've added words and confused yourself. The Lyman book reports the OAL they used in their test. They simply report the pressure with that powder at that OAL in THEIR test. The maximum SAAMI OAL for 9x19 Luger is 1.169". What the maximum OAL for your barrel is something you need to determine. But no reloading manual in the world is telling you the "maximum OAL" you can use.
So when Lyman shows you an OAL of 1.090", you can always go longer as your barrel dictates. (This because a longer OAL tends to lower the chamber pressure.) If you have determined that your barrel with the MagTech bullet will accept an max OAL of 1.150", then you are free to use any OAL between the Lyman 1.090" and the 1.150". So if you know that 1.135" feeds well in your gun you can use it with the Lyman loading data. Follow?
• Hodgdon doesn't have any data for a 115gr FMJ using 231. You need to be far more calm and conscientious about your research. The Hodgdon site does indeed have this info. So the question really is: Why did you miss it? I say this not to lambaste you in public; this is a serious issue you need to think about. Was I talking on the phone and not paying attention? Was I listening to something on the radio that distracted me? Whatever it is, it needs to be looked at, or next time you may seriously injure yourself. Follow?
• Since Speer makes the Gold Dot bullet, it stands to reason that the Speer reloading manual will have the best data for this bullet. I believe they show a slightly longer OAL than Hodgdon. This does not mean the Hodgdon data is bad or unsuitable, simply that the Speer book will show you the OALs the factory uses. If you intend to use a lot of Gold Dots, then the Speer manual might be something to consider as a useful future purchase or possible Christmas gift.
• The Ranier site does not have reloading data, but they do tell you to use the data for lead bullets with their products. So you would go to the Lyman manual and use the 115g lead data for your Rainer. In that way the starting loads AND the final best accuracy loads may (probably will) differ between the MagTech and Ranier. This point alone shows why you need to be meticulous by keeping a reloading notebook.
• Obviously the max OAL between the Ranier and the MagTech bullets may differ for your barrel simply because no 2 bullets have the same exact ogive shape. If one is 1.150" and the other is 1.140" then you can shoot them both at a common OAL of 1.140", but their loads will be different because that are not the same construction.
Hope this helps!