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Swarovski ?

 
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  #1  
Old 05-22-2008, 11:04 PM
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Swarovski ?

I have a 4x12x50 i got a great deal with a standard reticle. Thinking about seeing if they will install the TDS reticle for my 7 mm STW. I am used to doing clicks but thought it would be quicker to go the TDS route. Anyone have any experience with these things? Or is it even worth it.
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  #2  
Old 05-23-2008, 03:06 PM
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I doubt you'll get them to install the TDS. They discontinued it and replaced it w/the BR reticle. Got tired of paying royalties I guess.
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  #3  
Old 05-24-2008, 10:19 AM
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Which one is the BR reticle?
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  #4  
Old 06-01-2008, 02:18 PM
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I dont know about the BR reticle but I would not spend the money un swapping to a TDS. The distance/angle coverage between lines is not constant; you´d be better off with a MOA or mil based reticle.
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  #5  
Old 06-01-2008, 03:39 PM
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The 7STW is too flat a shooter to match up well with the TDS reticle. The TDS graduations on the reticle subtend the following on a target at 100 yards:

crosshairs
1st line down - 2.0"
2nd line down - 4.8"
3rd line down - 7.5"
4th line down - 10.5"

So with a 100 yard zero the reticle would correspond to the following trajectory:

100 yard zero
200 yards - 4"
300 yards - 14.4"
400 yards - 30"
500 yards - 52.5"

200 yard zero
300 yards - 6"
400 yards - 19.2"
500 yards - 37.5"
600 yards - 63"

That doesn't match up to most 7STW loads, for example a 160 gr Accubond with a muzzle velocity of 3100 fps would have the following trajectory:

100 yard zero
200 yards - 2.6"
300 yards - 9.8"
400 yards - 22"
500 yards - 40.3"

200 yard zero
300 yards - 5.9"
400 yards - 16.9"
500 yards - 33.8"
600 yards - 57.6"

Not too bad at 200 yard zero. If you shoot the 140 gr bullet it would get worse, the 175 gr bullet it would get closer. You would have to shoot a bullet with a ballistic coefficient closer to .400 in a 160 gr weight and use the 200 yard zero to really match a TDS.
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  #6  
Old 06-01-2008, 06:08 PM
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Thanks obviously not worth it.
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  #7  
Old 07-25-2008, 10:19 PM
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TDS

I have had great success with the TDS, you just have to find your factor number and the range bar markers are right on.
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