OpticsTalk by SWFA, Inc. Homepage SWFA     SampleList.com
Forum Home Forum Home > Scopes > Rifle Scopes
  New Posts New Posts RSS Feed - Nikon new BDC reticle
  FAQ FAQ  Forum Search   Events   Register Register  Login Login

Visit the SWFA.com site to check out our current specials.

Nikon new BDC reticle

 Post Reply Post Reply
Author
Message
encoreguy View Drop Down
Optics GrassHopper
Optics GrassHopper


Joined: March/05/2006
Location: United States
Status: Offline
Points: 24
Post Options Post Options   Thanks (0) Thanks(0)   Quote encoreguy Quote  Post ReplyReply Direct Link To This Post Topic: Nikon new BDC reticle
    Posted: March/06/2006 at 08:59
I saw on their web site that they are offering a new BDC reticle on many of their scopes.  Has anyone seen one?  What are your thoughts?
Back to Top
Dale Clifford View Drop Down
Optics Jedi Knight
Optics Jedi Knight


Joined: July/04/2004
Location: United States
Status: Offline
Points: 5087
Post Options Post Options   Thanks (0) Thanks(0)   Quote Dale Clifford Quote  Post ReplyReply Direct Link To This Post Posted: March/06/2006 at 09:16
all BDCs are a compromise of how well the rounds you just bought match the "distancing" in the reticle. Thus if you had say a 30-06 with a BDC that was set for the velocities obtainable in a 24 in barrel but you decided to use it on your DSA 16" the scope would be way off. This is why ACOG has two scopes, one for 20s and one for M4s. No BDC can be as well matched as handloads, chronographed and then "dialed in". It is possible to cross match . Given the ballastic curve of the BDC, find all bullets and velocity combinations following that shape with the Ballastic coef. of other calibers or at least close to it, then use handloads to duplicate that ballistic profile. Programs such as Sierra's and Ohlers make this pretty easy. Mil-dot type systems approach this problem by eliminating the progressive drop as distance increases. Nikon hasn't gotten into many reticle wars for who knows what reason. This hind sight on their part may prove a smart move afterall as laser rangefinders "outdate" all in scope ranging reticles.
Back to Top
encoreguy View Drop Down
Optics GrassHopper
Optics GrassHopper


Joined: March/05/2006
Location: United States
Status: Offline
Points: 24
Post Options Post Options   Thanks (0) Thanks(0)   Quote encoreguy Quote  Post ReplyReply Direct Link To This Post Posted: March/06/2006 at 10:46
My ballestic plex reticles in my Burris scopes have worked very good for me in hunting situations.  I simply shoot my favored load and come up with my own chart on the marks.  I use a range finder, then adjust to the proper tick mark and squeeeeeeeeze.  In coyote hunting I just don't feel that I have time to "dial in" but you bring up a good point that doing so is by far the most accurate way.  I was just curious what people thought of the looks and layout of their new reticle.
Back to Top
Urimaginaryfrnd View Drop Down
MODERATOR
MODERATOR
Avatar
Resident Redneck

Joined: June/20/2005
Location: Iowa
Status: Offline
Points: 14964
Post Options Post Options   Thanks (0) Thanks(0)   Quote Urimaginaryfrnd Quote  Post ReplyReply Direct Link To This Post Posted: March/12/2006 at 10:37

That's the secret you have known fixed points (lines inside the scope) and you shoot  enough to determine what distance those fixed points in the scope represent with your ammunition..

 

P.S. Laser rangefinders are great until the battery goes out at the worst possible time.


"Always do the right thing, just because it is the right thing to do".
Bobby Paul Doherty
Texas Ranger
Back to Top
catusbill View Drop Down
Optics Apprentice
Optics Apprentice
Avatar

Joined: July/07/2005
Location: United States
Status: Offline
Points: 161
Post Options Post Options   Thanks (0) Thanks(0)   Quote catusbill Quote  Post ReplyReply Direct Link To This Post Posted: March/12/2006 at 13:53
You fellows may find this interesting. I'm trying to find loads in .223 and .308 with close trajectory to optimize my BDC on Burris FF-II .

Federal American Eagle Full Metal Jacket

AE223N                          AE308D

WT   62                            150
BC   307                           408
100   1.6                           1.8
200   0.0                           0.0
300   7.5                           7.9
400   22.4                        23.0
500   46.6                        46.8

Maximun difference is .6 of an inch. With all things considered this is usable on a BDC scope. You just need to test fire at range and chart the scope hash marks to the distance.
Back to Top
sscoyote View Drop Down
Optics Journeyman
Optics Journeyman


Joined: October/05/2004
Status: Offline
Points: 328
Post Options Post Options   Thanks (0) Thanks(0)   Quote sscoyote Quote  Post ReplyReply Direct Link To This Post Posted: March/14/2006 at 12:27

Usually for my applications i apply a "tactical" system with the reticle, since the handguns i'm using don't match std. trajectories well. Besides that if i wanna use a mil-dot reticle i want a system that gives me exact zeros, and then interpolative for the in-between ranges. Here's the system i use--

 

1) Convert stadia subtensions from inch per hundred yds. to MOA

 

2) Run ballistics program for load.

 

3) Match up MOA calcs for reticle zeros.

 

4) Check each zero at range

 

5) Note difference (in MOA) between ballistic profile and real world shooting for stadia zeros.

 

6) Adjust BC or muzzle velocity of load in ballistics program until i get the best reticle-trajectory fit.

 

7) Calculate interpolative zeroing between stadia.

 

8) Calculate the same for windage.

 

9) Make range sticker for gun and laser.

 

10) Recheck occasionally.

Steve
Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 12.01
Copyright ©2001-2018 Web Wiz Ltd.

This page was generated in 7.422 seconds.