I would give Hornady a call or send an email... they have .356 data in the 9th Edition Manual and use LVR for many other cartridges... they may have exactly what you are looking for... short of that, you can cross-reference comparable load data in other cartridges where data is published using the same powders as .356, but also use LVR... this will give you a working baseline to start at, and you can work up from there. For example compare load data for .35 Rem in the Hornady 9th edition, for which there are same powders listed, but also listed in .35 Rem are the 200 FTX with LVR. As the .356 can handle higher pressures than the .35 Rem, I would say that you are safe starting at published MAX for .35 Rem and working up from there, which according to the manual is 42.7 grains LVR with the 200 FTX. AS ALWAYS, USE AT YOUR OWN RISK AND WORK UP...