SCOPE ADJUSTMENTS

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  • Last Post 03 September 2018
joeb33050 posted this 02 September 2018

I use a Lyman 30X STS and 3 Weaver T36 scopes.

Example: The aiming point is one dot on white paper. For a 5 group test, I shoot 1 group, adjust up 2" and shoot, adjust right 2" and shoot, adjust down 2" and shoot, adjust down 2" and shoot and done.

There's a lot of cranking on the sight adjustments, and I'm getting a little goosey about the adjustments.

Does anyone out there know if I'm going to damage these scopes with this method? 

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Scearcy posted this 02 September 2018

Joe

It really shouldn't bother a Weaver T-36 but why take the chance. You are also introducing an additional variable to the first shot or two after every scope change. Go on line with Midway or anyone the handles National Targets and order a couple of rolls of black target patches. They will last you all year and you can put as many as you wish on a piece of butcher paper.

My mentor when I started playing this game would would not adjust  his scope once a match started always maintaining that at the end of the summer he would have beaten all of his competitors that adjusted their scopes rather than holding off when conditions changed. We used Leupold 36X and Weaver T-36s. He have shot jacketed benchrest for years before he joined us.

Jim

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Scearcy posted this 02 September 2018

$2.99 per 500 patches. 

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Ken Campbell Iowa posted this 02 September 2018

i still have rolls of patches from my happy days at FT. Leonard Wood ...   I always volunteered to pull targets ....  even use them on groundhogs ...

on the scopes, in the ARA rimfire bench game we returned some Weaver 36 to service ... they vaguely mentioned a few soft components in the clickeries of a very few.    lucky us . they would lose one click ... 1/8 minute ...  with our 22 rf we could tell at 50 yards.  dang.  ( tears flowing ) anyway, they still did better than the Leupolds .  oh, they gave us new scopes ... good on weaver.

FWIW, my B&L 36 never missed a click  ... I still gots it ... just in case the CBA  R&D team finds a truffle . ( g ) .

ken

 

 

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John Alexander posted this 02 September 2018

I'm with Jim. But why black aiming points to put black crosshairs or black dots on?  How about yellow?

I use a homemade rubber stamp that leaves a black hollow square with a small white (assuming white paper) square to try to keep the crossing centered in.  You can stamp out dozens in very short order.  A proper sized hollow circle to center a dot in would be even better.  If your printer will handle other than copy paper which isn't the best target material you can do it on the computer.  No adjustment twirling needed.

Another advantage is that if the center of the group is moving from group to group it will be obvious in a horizontal line of aiming points.

Of course adjust the POI to not tear up your aiming point.

John

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BigMan54 posted this 02 September 2018

I don't care for copy paper targets or those printed on the same slick paper.

I prefer the traditional course finish buff paper. There is never any reflection or distortion from the sun on a bright day. Which is probably why NATIONAL TARGET prints them that way.

I have a great number of one inch grid targets with 4 2" squares printed 2"s from center towards each corner. Great for 4 groups of 5 shot or if the groups are small enough & consistent enough, 10 shots.

The shiny glare from those smooth white paper targets also plays havoc when shooting at an indoor range. Lots of glare there. For bullseye shooting I tape a buff 50ft slow fire pistol center on to the big shiny target they give you on the way in.

That non-reflective surface makes a big difference in getting a sharp sighting picture. I just get better groups.

Long time Caster/Reloader, Getting back into it after almost 10yrs. Life Member NRA 40+yrs, Life S.A.S.S. #375. Does this mean a description of me as a fumble-fingered knuckle-draggin' baboon. I also drool in my sleep. I firmly believe that true happiness is a warm gun. Did I mention how much I HATE auto-correct on this blasted tablet.

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onondaga posted this 03 September 2018

Joe, the makers of the scopes most likely will say you are causing no harm with your repetitive scope adjustments. However, I believe you will run into mechanical hysteresis causing error in the same repetitions. That is more than Murphy's Law. The more repetitions, the more likely the error will occur. My estimate is that it started the second time you did it with the same scope and it continues to exacerbate.

Additionally. I could not resist the opportunity to use exacerbate and hysteresis in the same paragraph.

 

Gary

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Ken Campbell Iowa posted this 03 September 2018

since it is a holiday, i thought it appropriate to insert a little eye candy ... also it does have a connection here, as these rests we used in 22 rimfire had ZERO backlash ... note that we adjusted the rest knobs, not the scope ...  it had x y angle enough to cover about 2 feet square at 50 yards.  i made the needle sharp staking pins from micro-grain carbide .

yeah, the rest had about 40 man hours in it .. all fittings were stainless steel, balls are drawer pulls !! ...  oh, note the flat slider plate pillar bedded into front bottom of stock ... 

all this work and the bullets still went a quarter inch upwind !! ...

ken

 

 

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