Thanks Bruce! I found the info on the 2nd link fine, but not sure what the 1st link had? Looked through a fair number of pages, but unsure which page you were referring to?

bruce moulds wrote on Jul 9^th, 2018 at 3:57pm:


Thanks Bruce! Very interesting write up that Maj. Hinman did on the cartridges, rifles, and equipment for long range! 
  I've often read that many shooters liked the "Creedmoor" back position for prone, and used the heel sights. My personal #7 Ballard is the exception to the rule, as it was ordered without the heel sight base in the stock. John Dutcher told me last year he'd not seen a #7 without a heel base until I showed him mine last year. But not a lot of plain #7's exist. The #7 A-1 is much more commonly seen.

I would agree that most long range or Creedmoor shooters not only shot breech seated, but also had gaps in their BP loads. Seems the general consensus today is that any air gaps in BP cartridges is very  bad, but that didn't seem to be the thinking a decade or more ago.
I read sometime back about Creedmoor shooters using the .44-77Rem./Sharps case and breech seating it to get much larger case capacities during the matches.