Hornady black 105 hpbt swipes

[topclass2017]

My 20" faxon shoots the hdy factories in the low to mid 2600's.  The Hdy Black you have looks to me to be hot, like  you say.  Could be your box is one of the earlier batches that was set too long.  The 105 IIRC needs to be at about 2.200 but some early hornady boxes were set at  - from memory now - 2.24 or so?  You could check their OAL, and if long could set them down to 2.200 and see how they do.

measured COAL of both rounds.  Black is at 2.210", white at 2.254".

will slowly shoot them up to recover the brass...