Thread: .243 load development part deux

Originally Posted by Zedrex

That makes sense and my question then is that if I understand correctly, distance to lands is a direct result of COAL adjustment, if I know my Max COAL (69.8mm) then this measurement puts my projectile just on the lands so my current COAL of 67.5mm puts me within the 0.100" - 0.030" window you mention?

You need to measure the OAL or CBTO of a cartridge that is touching the lands for your own rifle and bullet.

If you don't have the equipment available to do that, just seat it where it is and don't worry about it.

I am assuming you've taken that max COAL figure from the manual, not obtained it by measuring your chamber and this bullet.