I've got two 2.5-10x42's, one on a 20" Grendel, the other on a 21" GAP built Armalite 308. Really like optical quality and MP8 reticle. Also have 3-18x42 on 25" 6.5x47 build that I've had out to 1000 a few times. I will also offer that Val fully warranted my second 2.5-10 when there was limited reason he shouldn't have charged for the repair. Someone had really hamfisted the scope before me and passed it off as good-which it wasn't. Val addressed the issue after a discussion and has won me for standing behind his product. That's impressive, and though you often wonder about what's behind a good service rep, the manufacturers who stand up when you do have a problem should be supported for their efforts and integrity. I've got Bushnells, Vortex, SWFA, Leupolds and have reasons for appreciating each, but will say IOR is very GTG in my book. Buy with confidence.