Fired off my second batch of 100 loads the other day.  I'm trying to figure out how this rifle likes to be held; it seems to like firm fore end and butt pressure with the grip held lightly, no thumb.  It does have the 3 1/2 " fore arm but the butt is semi-sporter.
  The two best loadings were 11.6 of 296 under the Hoch 210 gr spire point at 1330 fps, and 11.6 of 4227 at 1360.  A .02" floral foam wad was seated at the mouth and the powder shaken to the back before loading.  Lube was 60/40 LLA/Johnsons liquid floor wax, sparingly applied and dried overnight.  Absolutely no leading, and it left a mild lube star.

Still lacking the  proper powders but the 10-round groups are beginning to look promising.  I'll slowly boost the powder charges up to around 1450 fps.   Will also try Darr lube dipped.