Rifle Scopes Scope Tracking Test

[gasdoc09]

Any reason not to do this at 25 yards?


Background - probably just pilot error, the nut behind the trigger, but I was shooting my TRG42 last week and at 900 yards 5.9 mils up was right on, but dialed up to 10 to hit a target around 1250, and the rounds were impacting way off to the left. I put 4 in the same patch of dirt about 8-10 feet left before I decided to quit wasting ammo. Didn't try anything more distant that day. Wind was absolutely calm and they felt like good shots until I saw them miss. Elevation was fine ... just left. I don't think the scope is canted, and I wouldn't expect cant to make it go from perfect at 900 to wide miss at 1250.


Anyway, I want to prove to myself that my scope is tracking correctly. At 100 yards going from 0 - 20 mils requires a really tall target, and my range has no stands or marks at 50 yards, but there is a nice 25y sight in range where I can shoot at that exact known distance. Seems to me 25 yards should be fine, and allow me to get 0-20 mils of elevation on a 2' piece of cardboard. Anything else I should be considering?

 

[Bill Larson]

I do it at 100yds....3 shot group....then up 6" one shot...over 6".. i shot... down 6"..i shot...over to zero...3 shot group...

 

[mattsnuked]

Can you measure the true tracking difference at 25 yards? I usually do it at 100 up to about 9 mils.

 

[Rob01]

Yup 100 yards and go atleast 10 mils up or 40 MOA. 6" won't tell you anything.

 

[gasdoc09]

Thanks all. Made it out to the range today, and took a 6' piece of cardboard and a level with me.

Scope tracked perfect at 3, 6, 9, 12, and 15 mils. Went 3 mils right and left at 9 and 12 up, and those were right on too. Every hole within 1/2" of where it was supposed to be.

Guess I can only blame myself for all those misses last time I was out.