I'm currently having problems with emails from the website coming through and will have a computer man check it out soon as he gets times. Until it is fixed, please email be direct at LBTisAccuracy@Imbris.net
If you'll email me requesting the current sale list, I'll email it and answer your personal questions that way.
I don't recommend 300 gr bullets for the 44 special, and though I have shot many 280 gr WFNs out of mine at 1000 fps from a Charter bulldog, 3 inch bbl, and 1150 fps from a 4 inch tube with the same load, I don't recommend that much weight either. Best weight is 260 grains in my opinion. Definately use 296 or H110 for your heaviest loads. If you'll read my book it will explain how to get maximum power safely from any gun, using my primitive but very precise pressure comparison.