gamestalker
member
Like everyone else who has owned a scope or other device with a BDC, it gets really frustrating to learn that the BDC is flawed when bullets of varied velocity and ballistic coefficiency are used. They only provide an average compensation that is derived from a factory load of only one performace range. So if you reload and your loads are performing above or below the standard they were based on, your POI is going to be pretty far off. In all honesty, most BDC systems are slightly better than
So last year my Son and I invested in the Leupold RX-IV range finder with Leupolds newest high tech BDC system or TBR. At first I was doubtful of how accurate this system was with various bullets, velocities, and B.C.. But after some really serious testing using hand loaded ammunition of different performance levels, and at varied distances out to 1500 yds., I am sold. After chronographing the loads and estimating or knowing the B.C. of the bullet being used, all I have to do is select the program that matches that particular performance level, regardless of what that may be. Once I have that data, all I do is range the target and then make the adjustment on the scope turret as instructed by the device, and it's there. It doesn't even matter how far away the target is, it's of no importance what so ever. The range finder tells me how much MOA adjustment to make. For instance, if the TBR or BDC indicates I need to go up 2.6 MOA's I make the adjustment and I'm right on the money. I will say this though, this system is not for those who don't own a chronograph and don't know what the B.C. is for the projectile in use, other wise the accuracy of the device can be greatly comprimised.
I even tried to get it to fail by using 2 bullets of the same velocity but different B.C's and it still worked flawlessly once I entered the pertinent data.
It also has another nice feature for hunting, the B&C feature. Even at distances outto 1500 yds. it will deliver the width and how tall the rack is along with tine lengths. But this feature requires a tripod to steady it on to keep the readings consistent. Actually unless the target is fairly close a tripod or mono pod is necessary anyway to use the TBR feature as well.
Last year using a 7mm RM using my reloads which were 130 gr. BT with a MV of just over 3300 fps, my Son who had just returned from Afghanistan by the way was excited to enjoy some R&R. So after glassing a lot of deer we finally settled on a nove 5x5 mule deer. I ranged it and it was at exactly a 19 degree angle, which didn't matter to the device because it compensates for angle. It returned a turret adjustment number for the distance which was 729 yds. true ballistic range, not line of sight. Actually line of sight was like 40 or 50 yds. further. Then using a tripod shooting rest he put the cross hairs right on the kill zone and actually put the round directly through the heart, dead deer. It was so cool watching it through the Leupold spotting scope, I guess it's pretty evident that I'm a Leupold only otpics guy, as are all of my 5 Son's.
So last year my Son and I invested in the Leupold RX-IV range finder with Leupolds newest high tech BDC system or TBR. At first I was doubtful of how accurate this system was with various bullets, velocities, and B.C.. But after some really serious testing using hand loaded ammunition of different performance levels, and at varied distances out to 1500 yds., I am sold. After chronographing the loads and estimating or knowing the B.C. of the bullet being used, all I have to do is select the program that matches that particular performance level, regardless of what that may be. Once I have that data, all I do is range the target and then make the adjustment on the scope turret as instructed by the device, and it's there. It doesn't even matter how far away the target is, it's of no importance what so ever. The range finder tells me how much MOA adjustment to make. For instance, if the TBR or BDC indicates I need to go up 2.6 MOA's I make the adjustment and I'm right on the money. I will say this though, this system is not for those who don't own a chronograph and don't know what the B.C. is for the projectile in use, other wise the accuracy of the device can be greatly comprimised.
I even tried to get it to fail by using 2 bullets of the same velocity but different B.C's and it still worked flawlessly once I entered the pertinent data.
It also has another nice feature for hunting, the B&C feature. Even at distances outto 1500 yds. it will deliver the width and how tall the rack is along with tine lengths. But this feature requires a tripod to steady it on to keep the readings consistent. Actually unless the target is fairly close a tripod or mono pod is necessary anyway to use the TBR feature as well.
Last year using a 7mm RM using my reloads which were 130 gr. BT with a MV of just over 3300 fps, my Son who had just returned from Afghanistan by the way was excited to enjoy some R&R. So after glassing a lot of deer we finally settled on a nove 5x5 mule deer. I ranged it and it was at exactly a 19 degree angle, which didn't matter to the device because it compensates for angle. It returned a turret adjustment number for the distance which was 729 yds. true ballistic range, not line of sight. Actually line of sight was like 40 or 50 yds. further. Then using a tripod shooting rest he put the cross hairs right on the kill zone and actually put the round directly through the heart, dead deer. It was so cool watching it through the Leupold spotting scope, I guess it's pretty evident that I'm a Leupold only otpics guy, as are all of my 5 Son's.