What bullet diameter to use with Greenhill's Formula?

[Naphtali]

When using Greenhill's Formula to identify maximum bullet length, what do I do with patch thickness? What I'm asking is whether the nominal bullet diameter to plug into Greenhill's is just the bullet diameter I intend to use, or do I include patch thickness (.010-.015 inch) as [part of] bullet diameter?

Since I'm wanting to have a mold made that will yield the heaviest bullets for the bore diameter and twist, kvetching out the last few grains of weight is important.

The rifle in question is a double rifle, bore size will probably be .72-caliber and 1:72 inches twist.

[405]

In theory the formula deals with a bullet in free flight so use it without the patch diameter. "On the edge" is just that and the formula likely won't be sensitive enough to predict to the last few grains of weight nor hairs of length.

[Baron von Trollwhack]

Ahem,