"The Warne Scope Mounts Company of Oregon was doing business - the
manufacture of scope mounts and components thereof. ... Charles Lake,
President of Warne Scope Mounts, submitted an application from the company
for a business line of credit to purchase materials to make work benches as
well as to purchase appliances, to the Home Depot. ... The credit line was
approved on September 28. On the 29th, Mr. Lake received a call from the
Home Depot credit department saying the line of credit was rescinded. He
asked if it was something in the company's credit rating. "No," he was told.
"It's because of the industry you are in."

It was Citi Bank - who handles the private label credit cards for Home
Depot - that didn't like guns.

http://www.theoutdoorwire.com/features/223490