GREAT idea on the otoscope speculae I'll have to pick a couple up on my next Doctor visit. I haven't tried BL-C2 yet in the .204 but have heard it is at/near the top of the list for velocity in the .204Rug.
I have tried Varget with good accuracy but I wasn't happy with the velocity, and because it's a .204 I want the velocity!. Also because its a stick powder Varget wasn't as easy to get in a case like TAC, although it wasn't too hard either.
I have some Ramshot TAC, and Vit 140 on hand waiting to be tested but these are for light 30-32gr range bullets. Quickload shows Reloader 10x as a good powder too with a high case fill rate. I have heard Win 748 is a good powder for the 39-45gr range but I'm not partial to winchester powder so haven't tried any. A good place to sponge knowledge from in regards to small calibers like the .204Rug is the saubier Fourms.
I still have a funny feeling when I go from loading .308 sized bullets to the small .204 bullets... can't imagine loading with .17 cal bullets!
If I get my way I may be able to shoot out my factory .204Rug barrel this spring/summer and try one of those Krieger barrels Obtunded offers.
Happy loading and share any good results you have with the 39gr Blitz Kings, I have yet to try them.