I too have a 4 3/4" .475. The most accurate revolver I have ever fired. Will stay under 1" at 50 yds. Starline brass is very good, I have always used Hornady. It's cheaper, very high quality, and after 20+ firings, I haven't lost one. For dies, I have the Hornady Titanium Nitride 4 die set. These dies are inexpensive, you don't need to lube cases, and mine came with the taper crimp die, which I think you will need. I did, as my ammo will not fit in the tight F/A chambers without it. For full power loads, I like H-110 powder, for plinking loads, Unique. CCI mag. primers for the hot stuff. When Veral gets back to LBT, get one of his molds, they are expensive, but are the best I have seen. I shoot a 440 gr. WFN for full power loads, but they shoot poorly for plinkers, I suggest maybe a 400 gr. or less for the light loads. RCBS makes a 400 gr. SWC that I understand shoots well. I don't think a Ruger holster will work, unless it's made on the loose side. I bought a F/A holster for mine, pricey (100$), but very well made. Have fun with your new boomer!