Sightron STAC 1-6x24mm SFP Field Eval

[Formidilosus]

This is a field evaluation of the Sightron STAC 1-6x24mm SFP scope. This scope was sent to Ryan from Sightron for the Evaluation. The baseline 20 round group with this lot of ammunition was 1.3” at 100 yards.



The scope and weight-






Turrets:

.25 MOA elevation and windage turrets are capped, resettable, and revolution indicated.





IRAR1 SFP reticle:





Illuminated-



The reticle is a BDC, half donut type.



Cont….

 

[Formidilosus]

Zeroing:

Scope was mounted as standard with NF UL rings. The rings were degreased and installed with 65 in-lbs on base screws, and 18 in-lbs on ring cap screws. The baseline 20 round group with this lot of ammunition was 1.3 MOA at 100 yards.


Zeroing went without issue. Boresight, fired one round, adjusted, fired three, adjusted, fired the reminding 6 in the dot. The center of the 6 round was high .25 MOA and right .25 MOA. I did not adjust it out.






Drop Evaluation RTZ and “Tracking”:


For an explanation see- Scope Field Eval Explanation and Standards


The “test” consists of three 18” drops on a mat- one left/right/top with a shot to check zero after each drop. Then the exact same thing repeated from 36”. Then three drops on all three sides for nine drops on the last part- 15 drops total. This is not “abuse”. The 18” drops are a joke really. The 36” start showing something. And when a scope make/model consistently goes through the whole thing without losing zero, and makes it through the high round count portion, failures in actual use are almost unheard of.

This one was conducted on semi packed soil.



It shifted up.5 up, and right .5 MOA.

Torqued ring cap screws to 25in-lbs, adjusted down .75 and left .5 MOA-





2nd Drop eval- no issues






RTZ: no issues





Adjustment: “tracking”.


24.75 MOA between dots. It actually moved 23 MOA for a 7% error.





Conclusion:

Once again 18 in-lbs lets a scope move enough to cause a slight zero shift. 25in-lbs corrected it. Other than the 7% adjustment error at 24.75 MOA, the scope worked without issue.

 

[Formidilosus]

Zero check after 1,000 plus miles of having gear on top of it-