I have a Delta Striker HD 4.5-30x56 with the LRD-1T retitled (FFP)mil/mil.
I used it for load Dev and practice, plus in a comp at the excellent Roundhouse Rifle challenge this weekend just gone. It held zero, tracked repeatably and the dialed corrections measured off reticle were accurate. The reticle at full mag is still reasonably fine for a FFP scope, though the flip side is that it's very fine at 4.5x. Only the very centre X of the reticle illuminates (personally, I like this).
Optically, it's about what I'd expect for the money (v good but not exceptional.) generous eyebox, no tunneling. It feels well made. Positive turret clicks. Space on elevation turret for your custom drops (but windage is lower profile, which I like, but no space).
Minor Gripes:
Non-locking turrets (so possible to turn by accident when sliding rifle in and out of eg: Eberlestock pack.)
Windage turret has no markings/indications for direction of adjustment when viewed from usual position behind rifle (there is an arrow on the flat of the turret)
Illumination dial easy to turn by accident when adjusting parallax.
Battery cover easy to unscrew by accident when adjusting brightness or parallax.
Cat-tail throwlever good length but needs (careful) threadlock to stop it loosening.
I'm pleased so far. Hopefully won't need the 10year warranty.