02-19-2017, 04:37 AM
Two different ballistic curves so it's not going to work.
I don't know the exact drops on the BDC you are used to but it will be something similar to a Sierra 155gn @ 2,750fps.
Your 18" Grendel will get you around 2,565 for a 123SST.
The respective drops compared side-by-side out to 500yds with a 100yd zero are;
![[Image: Untitled-1_zps5ok3klkv.gif]](http://i1374.photobucket.com/albums/ag436/stupidbernard/Untitled-1_zps5ok3klkv.gif)
Let's face it, you are going to be trying different ammo in the Grendel and each will have it's own ballistic curve. None of them are going to match the 7.62 and on top of that you won't be able to use a ballistics calculator to help you.
I don't know the exact drops on the BDC you are used to but it will be something similar to a Sierra 155gn @ 2,750fps.
Your 18" Grendel will get you around 2,565 for a 123SST.
The respective drops compared side-by-side out to 500yds with a 100yd zero are;
Let's face it, you are going to be trying different ammo in the Grendel and each will have it's own ballistic curve. None of them are going to match the 7.62 and on top of that you won't be able to use a ballistics calculator to help you.