OK, here's some more info from a former employee ( also a relative of the owner of Standard ). Majestic was not related to Standard, no common ownership connection. All rye whiskey made by Majestic was barrelled and warehoused at Majestic's site. Only the Bottled-In-Bond was bottled there. All barrels for non-BIB (most of the whiskey) were shipped to the Standard's Lombard St facility in Baltimore for bottling . Standard had a 5-story building complete with a bottling line.
For a short period before the sale to Heaven Hill, Standard contracted with Michters for a supply of rye whiskey. We can assume HH continued using Michters and maybe other PA ryes until their own in-house rye became of age.