Scope tracking

jackie schmidt said:
Sure.

I hit a snag. Once you get down to the reticle cage, it appears to be a entire self contained Assy, screwed into the back of the Tube as a separate unit.

I remember about 5 years ago, at The Blubonnet, a shooter dropped a rifle with a 50x march mounted. The scope almost broke in two at that spot and appeared to be screwed in the body with a very fine thread. There is a good possibility that there is some type of locking compound that keeps that threaded joint tight.

I will study it some more before I start heating and beating on it.:eek

Peering down in, I can see the reactor tube, but not the gimble mount. It must be mounted forward, opposite of what Leupolds are. This means the objective lens will have to be removed to access the gimble joint.
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It's too bad you took it apart Jackie, because Shiraz said that he could of probably fixed it for nothing.
 
Butch They have the NSX 1-4 24mm compact. They used to have a whole line of CQB riflescopes but I don't see them on the website.
 
NF is working on a 4.5X SR scope at the present. The fellows that have tried various brands of existing scopes that meet the letter of the rules have not found one suitable. Fixed parallax doesn't work well shooting from ranges of 200-600yds. An 1/8 non illuminated dot can not be seen at 6oo yds on a black 10 ring. !/2"moa adj on vertical and horizontal is too big. They have to have positive clicks as the move their scopes alot for windage in the changing conditions.
 
Butch Lambert said:
NF is working on a 4.5X SR scope at the present. The fellows that have tried various brands of existing scopes that meet the letter of the rules have not found one suitable. Fixed parallax doesn't work well shooting from ranges of 200-600yds. An 1/8 non illuminated dot can not be seen at 6oo yds on a black 10 ring. !/2"moa adj on vertical and horizontal is too big. They have to have positive clicks as the move their scopes alot for windage in the changing conditions.
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Butch,

The March 1-4.5X mounted on my 20 inch AR tracked well for me. Shot it at 1000 yards at the state LR match in fishtailing double digits winds. The parallax adjustment coupled with ED lenses renders the target clearly that I could put the illuminated 1/2 minute dot precisely on it.

Shiraz hit the ball out of the park on this one.
 
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jackie schmidt said:
I'm going to tear it apart. I have always been curious how March's design is different from the multitude of others I have taken apart.

I unscrewed the Ocular Lens about an hour ago. I have to make some spanner wrenches to get the carrier off.

The objective lens does seem to be mounted in a very fine thread with some type of locking compound to secure it. That might be how they get the focal plain exact.
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Put in oven not sure of temp. 400?
 
Scope

Seems like its taking an inordinate amount of time to figure out how to disassemble this March scope. Makes you wonder if its even worth trying.



Glenn
 
Here is a little advice on adjusting scopes that came to me, a couple of decades or more back, from Dick Thomas, who owned and operated Premier Reticle, which was among other things approved by Leupold to work on their scopes.

When you are making an adjustment that involves turning your turrets counterclockwise (assuming RH threads), go past your intended stopping point by a good amount, and come back to it turning clockwise. I usually go a minute or so past and then come back. The reason for this is that when you are "unscrewing" a turret, you are depending on the spring that opposes it to cause the erector tube to follow that adjustment, and friction may prevent this from happening until the jarring of a couple of shots had shifted things around. When you adjust in the "tightening" directon you are pushing the erector tube with the end of the screw, and it has to move full value.

The old VXII hunting scopes were known to have tracking issues. People would tap on their turrets with plastic screwdriver handles and the like. Last year I was at a range and noticed that the fellow that was shooting next to me seemed to be having a lot of trouble sighting in a couple of rifles that had the old 3x9 Leupolds on them. When I asked him about it, he told me that he had shot over 200 rounds in his attempt to arrive at the adjustment that he wanted. After I explained what Mr. Thomas had told me, he had both rifles sighted in in just a few more shots. The reason that it took that many is he over did it, backing out on his windage by several inches and then walking it in to his desired setting firing and moving repeatedly.

Related to this is information that came from an article in Precision Shooting magazine. The author used a scope collimator that had a grid to evaluate scope tracking. What he found was that by turning both turrets back and forth to their limits many times, that tracking was improved. Evidently this "exercising" of the turrets facilitated the scopes' internals smoothing up where they made contact much as one would break in a new engine.
 
I have three Denver Redfield 2-7X

scopes. I had to send one of them to Iron Sight to have the objective lens removed, separated and cleaned. The only problem I have ever had with any of them. They are good at holding POI and they track as they should. For the quality they are cheap if you can find one in good condition.
 
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