Using Ballistic Tables

[Phantom30]

Based on Remington 300WM 5R SS24" ACC Brake, Millet LRS. Zeroed at 600yds, shooting 208gr Hornady AMAX at 2850fps. I use a ballistic table for setting elevation and windage corrections. I also have 230gr Berger Hybrid Target rounds at 2850fps. I have a 600yd zero table for each round. The sight is zeroed for the AMAX Question? how can I translate between the tables to effective use the Berger rounds without re-zeroing the sight for that round?

 

[ShtrRdy]

So if I understand your question correctly, you would like to zero the rifle with the 208 AMAX round, (at 600 yds), and then be able to use the Berger round without changing zero. The way I would go about it is shoot the Berger rounds at 600 yds and adjust elevation and windage to obtain a zero. Now write those numbers down. Whenever you shoot the Berger ammo, just add/subtract those numbers from whatever correction you are dialing in for the shot with the Bergers. It's basically a correction factor that you'll need to include.

 

[Phantom30]

Thanks, that would surely work, but is there a way to use the tables to figure it out without shooting anything, rounds are expensive these days.

 

[DocUSMCRetired]

a simple fix is to use applied ballistics can do this easily. You have the weapon profile set with the AB Custom curves for your weapon. It will even adjust for differences between the weather when you zero and current weather. All you have to do is switch between the rounds, and tell it target distance.

 

[ShtrRdy]

Thanks, that would surely work, but is there a way to use the tables to figure it out without shooting anything, rounds are expensive these days.

I think a different load usually has a different point of impact so I don't think you can use a ballistic program to work through this.

 

[shovelstrokeed]

Thanks, that would surely work, but is there a way to use the tables to figure it out without shooting anything, rounds are expensive these days.

You probably cannot do it with zero rounds but a max of 3 rounds fired to establish a short range zero for the Bergers would probably do it. Get a zero at 100 yards with the Bergers and then look at the projected 600 yard come up and your should be close.l Your dials should give you the difference.

You might try, since you are already zero at 600 with the Amax and the MV of the two bullets is the same, dividing the BC of one by the other and applying the difference as a factor to the come up or down and applying it. Measure any correction needed from there in the reticle and correct as needed. Still gonna wind up having to shoot a couple of shots.