Case length + Freebore + Nose Length =OAL at the Lands

[Londerko]

Is it that simple or am I missing something?
I'm trying to figure out how much freebore I want in a new 300wm barrel.
The numbers "appear" to add up nicely.
Anyone use this?

[Robinhood]

Contact Nat Lambeth at Custom Guns and Ammunition. He has helped me customize chambers for a specific bullet in mind. His tips and work have helped me hold .7 MOA out to 1000yds in a 10 shot group. That will boost your confidence for sure.