What barrel length and what velocity, and any pressure?
On a XP-100 (smidget under 18"), 2725 MV with 115's, H-4831, no ejector marks on brass, 284 Win brass, neck turned, Fed match primers.
In hearing from other guys in the past using rifles, they didn't have any problems running the DTAC's hard but I don't recall what their MV's were.
Hopefully some guys here can give you longer barrel info.