Does borrowing your full HELOC amount lower your credit score?

[Ryan Millsap]

Has anybody used their entire HELOC allotment toward a property purchase? If so, did maxing out a line of credit tank your credit score just like maxing out a credit card could? I have 4 properties now so I rely on DSCR loans since my debt to income is toast, so I've gotta keep my credit score above 750 to keep getting those loans but I'd like to use a big ol HELOC to help with a down payment on the next property. Thanks y'all! -Ryan