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Weaver Choice Dilemna

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/12/2004 at 09:07
philgood80 View Drop Down
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I just bought my Winchester Model 70 Coyote in .270 WSM.  I have always used Weaver scopes, but I am faced with the choice of the Grand Slam 3-10X40 and the 3.5-10X50.  The difference in magnification is negligable.  I would like to have the 50 mm objective, but I want the scope mounted as low as possible.  Any help or suggestions will be helpful.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/12/2004 at 11:40
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Have you had a chance to compare the two side-by-side?  The GS's have outstanding glass; I bet there isn't a nickel's worth of difference between them.  I went through a stage where I just had to have a large objective, but over the years have come to the opinion that the added bulk and higher mounting height is not worth the small to indiscernible difference when buying quality glass.  I bet you'd like the 40mm just fine. 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/12/2004 at 21:38
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I concur, a handy rifle gets more game then an unweildy club. Unless you are moonlighting coons or something, get the 40mm.

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/15/2004 at 17:19
Chris Farris View Drop Down
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50mm scopes are not brighter than 40mm scopes.  It is all relative to what power the scope is on.   It is easier to explain using a fixed power scope for now.   People up to around 40 can perceive a 7mm exit pupil from the scope, because that is the maximum diameter of their pupil in low light or darkness.  So ideally you would want a scope that transmits a 7mm exit pupil, the only problem is how do you know what its transmitting (its easy).  Just divide the objective lens size by the power and the answer is the exit pupil or the amount of light that is coming out of the back of the scope. ie: a 6x42 scope transmits a perfect 7mm exit pupil (that's why they make scopes and binoculars in strange numbers like 8x56, 6x42, and 9x63.  The formula is a little different for a variable scope, you would take the objective lens size and divide it by 7 to determine what power to put your scope on for a 7mm exit pupil (the most your eye can handle). ie: a 3-10x40 would need to be set on 5.7x to produce the desired 7mm exit pupil. A 3.5-10x50 would need to be set on about 7.1x to get a 7mm exit pupil. You see, these two scopes 40mm and 50mm are just as bright, they just do it on different powers.  A larger objective allows you to use your scope on a higher power and still have perfect light gathering.  A 3-12x56 transmits perfect light on 8x.  A 1.5-5x20 does it on 2.9x.  First decide what power you need for what you are doing, then multiply that by 7 and the answer will be the size of objective lens you will need.

All of these formulas for producing the same light with different powered scopes are only relevant if you are comparing scopes from the same manufacturer and the same models.  ie:  Weaver Grand Slam.  You can't get a BSA 3-9x50 and set it on 7x and expect it to be just as bright as a Leupold 3-9x50, because it is the glass and coatings that primarily determine the scopes ability to transmit light to your eye efficiently.

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/16/2004 at 13:09
philgood80 View Drop Down
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Thanks for the input Chris.  I had almost decided on the 3-10X40 Grand Slam when I began considering the Weaver Classic V9 3-9X50.  I would rather have the 50 mm opposed to the 38 mm as almost all of my shots are over 200 yards, and I would like as large an exit pupil as possible as I increase magnification.  How do the Classics compare to the Grand Slams in terms of durability, clarity, brightness, etc.  Would I be ahead to get the Grand Slam over the Classic or is this one a toss-up.  Again, input or suggestions by any forum members are welcome and appreciated.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/16/2004 at 17:40
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Quote:

How do the Classics compare to the Grand Slams in terms of durability, clarity, brightness, etc.  Would I be ahead to get the Grand Slam over the Classic or is this one a toss-up.

 

philgood80,

Grand Slam scopes are equipped with the Micro-Trac 4 point adjustment system, which is considered by most to be the best in the industry. Both have fully multi-coated lenses and a solid, one-piece tube.  The Grand Slam has a fast-focus eyepiece, "sure grip" power ring   The coatings on the Grand Slam offer better low light performance.  Both scopes have finger adjustable windage and elevation but the Grand Slam's is a little smaller.

I think the Micro-Trac and the better coatings make the Grand Slam worth the extra money for what you want the scope to do, plus a portion of the proceeds from the sale of Grand Slam riflescopes will be donated to the Rocky Mountain Elk Foundation to help protect the future of wildlife and their habitat. [:Y:]

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