As a little PS to the above...
A few years back, when the guy in TX (Crocker) was importing them I bought a flat of Eley Hawk Grand Prix 65mm paper shells. I still have a couple boxes.
This is a fiber wad, 1 1/16 oz load of English sixes. The box shows '3 dram eq.'.
Their web site shows a 395 mps velocity for that load, which is 1295 fps.
My notes show that from an unaltered Fox 30" barrel they chronograph at 1265 fps. That's at 'roughly' 2.5 feet from the muzzle.
Their website now shows several faster loads in a 65mm case, comprabale to their competition (Hull).
Of course, I can't get my hands on either right now because nobody finds it profitable to import English shells to the USA.
Last edited by Shotgunjones; 02/18/14 12:58 PM. Reason: wrong notes