I was grouping some uppers the other day and half way through I figured it wouldn’t be a bad time to do a basic RTZ test. Both uppers were previously zero’d with the optics on them. One was a BCM with Vortex Crossfire in Scalarworks mount and the other was a KAC Mod2 Carbine with a 1-6 Razor in the Badger C1 mount. The plan was to pull both optics, throw on my new 1-10 Razor (also in a C1), group with some different loads at 50 and 100, then return the original optics to their respective uppers.
First was the BCM. I didn’t plan on testing RTZ so I didn’t shoot an initial group, but it was zero’d at 50yds with the same ammo. After grouping and returning the Crossfire/Scalarworks optic, this is the group I shot to see if my zero shifted.
Next was the KAC. Same plan, but I shot an initial group this time. The horizontal stringing lead me to believe that I was doing something weird as the shooter, rather than the zero being a tad high vs the POA. I should’ve shot a second group but was running out of time.
Here is the confirmation group, and what I expected the initial group would look like.
Not overly scientific and small sample size, but I was pleasantly surprised at how well these two RTZ’d and figured I’d share here.
If anyone has experiences with some type of proof, I’m sure it’d help others to see.
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Originally Posted by gaijin
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