Hornady Factory OAL Concerns

[Pig_Popper]

Using a Proof stainless steel barrel - and a modified case that I cut to be able to manipulate OAL Of the bullet while the Case is in the chamber 

I’m getting 2.2615” to the lands with a Hornady Black 105 gr BTHP

Also I measured 5 factory rounds and they varied in COAL from 2.2465” - 2.2525”

So I’m thinking Proof barrels are Ok with current 105 BTHP Hornady black loads .....