Before I get to your questions let me offer you a welcome also from the old graybearded one himself. Welcome.
Then an administrative note. HTML don't work in the subject line. Dunno why just know it don't. Often wish it did but don't. So I edited it out of your message so the tags didn't show.
Now on to the questions. Let's see if I can help any.
a. Sure someone's bound to. But it ain't me. :-D
b. Dunno. Didn't it come with a target? Maybe not. As an aside I'll say that historically bottle necked rounds in revolvers have had a checkered history. They don't always work well. If it don't set back and bind up the cylinder tho it should do nicely. I'm guessing you should be able to find loads that will give you 2MOA groups. I seriously doubt better.
c. Sorry but really no one is gonna be able to tell you the answer to this one. Just like any other gun you'll have to try different loads until you find what yours likes. Even if someone else has one just like it there best load could be your worst and vice versa.
d. I don't seem to have a loading manual here at the computer with the Bee in it but off the top of my head I'm thinking a 55 grain bullet is a bit heavy for it. Especially in the revolver with short barrel and cylinder gap. I believe 45s would do better or maybe the plastic tipped 40s. Hornady has a 35 V-MAX you might want to try.
Just use loading data from any manual that covers the Bee whether in rifle or handgun section. The powders that are best in the rifles will also be best in the revolver but velocity will be much less. If you have a current version of the TC Contender Loading Manual I think it has load data for the Bee in a 10" barrel. The one I have here at my desk is an old one and to be honest I'm just too dang lazy to go walk out and find a manual at my loading bench to check. :eek:
GB