Sniper Country Duty Roster collective wisdom


Scopes - Turret test:


For Information purposes; A couple of days ago I gave my target turrents a test that I do from time to time. This consists of running them through their entire range while watching each click to see if it is doing what it should and returning to where it should be when the center is reached. One of my old standby scopes that I thought was impecable failed miserably. There was backlash everywhere and sometimes 3 or four clicks would occur before the thing would do a big jump. VarXIII 3.5X10X40 tactical (no AO) was the offender. I would have bet my life on it. Damn good thing I didn't.
There is a moral to this story! Supply it for yourselves!
My 4X14 Leu was OK and the mil dot version was too. a couple of cheap scopes worked ok also. You never know!
 
B.Rogers <brogers@elkhart.com>
USA - Thursday, February 04, 1999 at 19:30:27 (ZULU) 


B. Rogers:

Would you mind explaining in more detail the turret test you mentioned. I'd be interested in trying it s/ my scopes. Thanks
Jeff A. <d1k2l3@aol.com>
Smyrna, Ga, USA - Friday, February 05, 1999 at 00:10:59 (ZULU) 


Jeff; The test is performed with a simple bore sighter like the bushnell or tasco. Just put it in (keep your head as still as possible) and Run the clicks slowly all the way up (cross hair going down) and all the way right and left. Count the clicks for an estimate of how high (longest range) you can elevate and watch for things like cross hair stopping for a couple of clicks and then jumps or side movement on clicks. You will then want to note on the grid where it is for various ranges and whether or not it will reset correctly to zero with the same number of click it took to go up. You will also be able to quickly see back lash by moving up and down a couple of clicks at different points along the axis. In general you should be able to go anywhere and come back with the same number of clicks but also you will quickly spot any problems with the movement of the cross hairs. You will sometimes see the hairs pause and then jump into place. Some of that is ok but not much is tolerable to serious work. Another thing you can check is your power ring by moving it in and out as you observe the zero. It should not change impact point or jump when you change direction or power rotation at or near the end (high or low). Much more conclusive than shooting and a lot cheaper. While I'm at it... Buy two bore sighters so you can change scopes from one rifle to another (if both are sighted in) without having to shoot either one. Oh yes! there is another use for a bore sighter and that's bore sighting. And another... you can set your boresighter as you torque your action screws and see how much movement and stress is being exerted by the tightening process. It will tell you a lot about your bedding. If the barrel is going right or left as your torque it down there is a problem somewhere.
B.Rogers <brogers@elkhart.com>
USA - Friday, February 05, 1999 at 03:58:45 (ZULU)  

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