I currently have Vortex, Bushnell, Nikon, Redfield, Leupold, Simmons, Bushnell, and maybe a few others that I'm forgetting. They are all good for different things (the Bushnell, Redfield, and Simmons are all craptastic).
A week or so ago, I purchased a Nikon P-308 4-16x42 for a 6.5 Grendel...and I love it. Nikon warranty is fantasterifical and I love the "Spot-On" app. With the app, I can adjust the BDC to account for most cartridges. A few years back I bought an old Monarch 3 at a garage sale that had a funky reticle. Worked well, the reticle just seemed a little wonky. I sent it back to Nikon and they no longer carried the parts to fix that one, so they sent me an upgraded newer model...it's hard to beat service like that.
A week or so ago, I purchased a Nikon P-308 4-16x42 for a 6.5 Grendel...and I love it. Nikon warranty is fantasterifical and I love the "Spot-On" app. With the app, I can adjust the BDC to account for most cartridges. A few years back I bought an old Monarch 3 at a garage sale that had a funky reticle. Worked well, the reticle just seemed a little wonky. I sent it back to Nikon and they no longer carried the parts to fix that one, so they sent me an upgraded newer model...it's hard to beat service like that.