I'm in the same boat except with 450 primers. Just waiting for my Dasher barrel. I got 2500 109 Hybrids so this shit better work lol. The plan is to start at 30.5gr Varget and go from there. A nice load in the 2820-2850 range and I'll be happy.
My Xero had a rattle. It was the OK button that had broken off. It was hard to push compared to the other buttons from day one and eventually broke off. Sent it back to Garmin and had a new Xero in less than 5 days. Send it back
If the target/pic is at the right distance and under good lighting the targets are not blurry at all.
There is a lens in the adapter, at least for DFAT.