Tasco target scope....help!

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I just bought a used older tasco "tr" model scope in 6-18X40...I've searched and searched (both here and the rest of the internet) but I can't find anything to tell me "exactly" how to use all of these knobs (since it was used, no paper work)...I mean this scope has settings on top of settings, and while I can get a pretty good group with this thing, I feel I'm not coming any where close to meeting this scopes potential.
Any help is greatly appreciated.
Blaze

P.S. Also can anyone tell me what these things retailed for?
 
Found on another site:

TASCO TR SCOPE.... The scope is a Tasco TR 4X-16X with a Trajectory/Rangefinder reticule. RedHead (BassPro) used to sell it for $160. The glass is only OK, but the range finder is what makes it my choice! It is a very simple system and works very well. Tasco gives you 5 rings that go on the vertical adjustment knob. Each ring has yardage readings out to 500 or 300 yards in 50 yard increments. They tell you which ring to use for each rifle, but I went one better than that. I wrote a small BASIC program that takes the bullet and velocity that I use and calculates a least square fifth-order polynomial curve fit to the drop numbers in the Sierra Reloading Manual. I then have a third order polynomial equation for the drop out to 1000 yards. No, I don't shoot that far, but numbers are cheap! Setting zero at 100 yards and using the height of the scope over the bore, the program calculates the number of clicks below the line-of-sight for each range past 100 yards. I counted the yardage clicks on each ring and selected the ring that best fits my calculation. I have a ring that is calibrated within ±1 click, of the true drop setting, all the way out to 500 yards for the .243 100 gr. Spitzer at a muzzle velocity of 2900 fps.

http://www.varmintal.com/ashot.htm
 
...and then I shall take the plutonium Q-36 space modulator and blow the earth to smithereens..."

Jeez M, folks like you make knuckle draggers like me realize just how much I don't really know. When I was 17, I knew evrything- I used to tell my dad that all the time, as time goes on I realize I get dumber by the day. Any way you'd care to edificate some of us on the nuts and bolts of your polynomial whose-a-majigger? I'd love to learn.
 
No kiddin', Shaggy!
That was some great reading M, (and it'll prolly be alot better read if I had a clue as to what you just said...+chuckle+). Thanks for the quick reply, and the link...now I gotta go do some reading and see if I can make sence of it all.
 
Yes, I like his site a lot. Actually I first discovered it while searching for information on my then-new mini lathe. The gun stuff was just gravy. ;-)
 
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