What does VMR 1 mean?
The VMR-1 reticle is based on minute-of-angle (MOA) subtensions. MOA measurements are based on degrees and minutes: 360 degrees in a circle, 60 minutes in a degree for a total of 21,600 minutes. These angular measurements are used to estimate range and correct for bullet trajectory drop in riflescopes.
Is a Vortex Viper a good scope?
The Vortex Viper HS 4-16×50 is the best overall scope for long-range shooting. It’s the jack of all trades: durable, adaptable, and affordable all in a sexy matte finish. I’ve had this rifle scope for 2 years now and it’s held zero like the first day I bought it and took it to the range. It’s that good.
What is the difference between Vortex Viper and Viper HS?

Ryan Avery said: The HS model has capped turrets. The HS LR has a exposed elevation turret with more reticle options and a zero stop. The HS-T has exposed elevation turret, little better reticle option for long range and a zero stop.
What size tube are Vortex Viper?
30mm
Blending many of the best features from Vortex’s incredibly popular Viper PST and Viper HS riflescopes, the Viper HST riflescope is built on an ultra-strong 30mm, one-piece aluminum tube to deliver ample windage and elevation travel and optimal adjustment.
Is the Vortex Viper first focal plane?

This optic is a first focal plane, which means you can use the reticle to range targets at any magnification, and you can use hold overs at any magnification level.
What is EBR reticle?
EBR-1 Reticle (MOA) This Vortex EBR 1 Reticle is a hashmarked ranging reticle that uses MOA based subtension lines for holdover, ranging, and windage corrections. To keep MOA (Minute of Angle) specifications to tightest possible tolerance, Vortex has used ultra precision laser etching on the glass reticle.