Let me begin by saying I have many rifles and a range of scopes from the least expensive to high end Leupold tactical scopes. I purchased this scope to put on a 223 Remington 700 stainless varmit and worked up loads based upon the slow twist barrel. This scope has seen hundreds of rounds and continues to please me when I dial up the power to test target grouping. The light transmission is very good up to about 32x and then gets more dim but still useable. In overcast conditions you would probably be better served to keep the power below 32X. This unit represents great value for $150. My Remington is the synthetic varmit model with a Jewell trigger and is deadly within the 223 cartridge limits. I can routinely shoot sub 1/2 minute 5 shot groups with hand loads. You don't have to walk out to check your target, just dial up the power and see the group.