adirondack
Active Member
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I have a B&C reticle and have been trying to figure out if there is a way to know the exact yardages for each aim point? I have all the info but am new to precision shooting. Thanks rob
help with leupold B&C
- Thread starter adirondack
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Cahunter805
Long Time Member
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If you have you owners manual for the scope you can find the actual MOA subtension spacing for the small and large triangle. Next use JBM ballistics to figure out what yardage would be closest to the hash marks of the BC reticle based on MOA drop. The problem with the B&C reticle is changing the power changes the yardage.
Here is a link that may help also.
http://www.longrangehunting.com/forums/f18/leupold-boone-crockett-reticle-65359/
Here is a link that may help also.
http://www.longrangehunting.com/forums/f18/leupold-boone-crockett-reticle-65359/
The problem with the
>B&C reticle is changing the
>power changes the yardage.
but the good news is that by changing the power you can find the perfect spot (spacing of the lines) to match your load.
What are you shooting?...I have found that most of these reticles work best with loads close to 3000 fps and then the lines work at easy to remember yardages (200, 300, 400...etc.)
If your slower than that than you just lower the magnification until it fits. The burris explanation on one way to sight it in is a very good approach. I will try to briefly explain it here.
Sight in at 200 yards. Get a big target (one that is big enough so that you can aim at the top of it and still be on the paper at 500 yards...like a piece of plywood). Place an aiming spot near the top and shoot at that spot. Your group will hit several feet low. Circle your group and spray paint it so that you can return to the firing line and see it through your scope. Now regain your sight picture and place your cross hairs on the original hold (at or near the top of the target). Then adjust your magnification until the 500 yard line in the reticle intersects your spray painted group. Mark your magnification dial for this spot and now your good to go and the 300 and 400 lines should be about on too.
>B&C reticle is changing the
>power changes the yardage.
but the good news is that by changing the power you can find the perfect spot (spacing of the lines) to match your load.
What are you shooting?...I have found that most of these reticles work best with loads close to 3000 fps and then the lines work at easy to remember yardages (200, 300, 400...etc.)
If your slower than that than you just lower the magnification until it fits. The burris explanation on one way to sight it in is a very good approach. I will try to briefly explain it here.
Sight in at 200 yards. Get a big target (one that is big enough so that you can aim at the top of it and still be on the paper at 500 yards...like a piece of plywood). Place an aiming spot near the top and shoot at that spot. Your group will hit several feet low. Circle your group and spray paint it so that you can return to the firing line and see it through your scope. Now regain your sight picture and place your cross hairs on the original hold (at or near the top of the target). Then adjust your magnification until the 500 yard line in the reticle intersects your spray painted group. Mark your magnification dial for this spot and now your good to go and the 300 and 400 lines should be about on too.
If you know the ballistics of your load then its easy. Just sight in for 200 yards and find the yardage which corresponds to the drop for each line in the reticle. The 300 yard line for small bullet drop is 8.61 " with a 200 yard zero. If your load drops 8.61" at 275 yards, adjust accordingly.
http://www.boone-crockett.org/news/news_leupold.asp?area=news
http://www.boone-crockett.org/news/news_leupold.asp?area=news
adirondack
Active Member
- Messages
- 204
Thanks for the guidence. It seems pretty simple. I will have to get out and try some 500 & 600 yd shots to see how close the math works out. I came up with about 625yds at the bottomaim point. 3300 fps, .507 bc. 180 gr. zeroed at 300yds. if anyone is bored and wants to check my rookie work. Thanks for the info as it has given me confidence that I was working in the right direction. Rob
