Regarding compressing 777, the datails related to cartridges gives a better bit of detail.
Triple Seven In Cartridges: Use data specifically developed for Triple Seven FFG only. Cartridge loads should be used exactly as listed in this pamphlet. You may safely use a card or polyethylene wad up to .030" in thickness to protect the base of the bullet. Loading density should be 100% with light compression not to exceed .100". Testing has shown that Triple Seven will perform best when the bullet just touches the powder. Allow no airspace between the base of the bullet and the powder. Do not reduce loads by means of filler wads or inert filler material such as Grits, Dacron or Grex. Do not heavily compress powder charges. The use of filler wads, inert fillers or heavy compression may cause a dangerous situation, which could cause injury and/or death to the shooter, bystanders or damage property. Do not create loads for cartridges not listed. Contact Hodgdon Powder Company for recommendations concerning other loads
Hodgdon 777 is Scultze type bulk powder and is made of either Nitrocelluose or Nitroligin (nitrated wood pulp) with potassium nitrate as a burning rate moderator. Hodgdon 777 burns at a similar rate to BP, but it is still a progressive type powder and it will burn faster if compressed.
Last edited by Smokeless Coal; 17-06-2009 at 08:48 AM.
“If a cricketer, for instance, suddenly decided to go into a school and batter a lot of people to death with a cricket bat, which he could do very easily, I mean, are you going to ban cricket bats?” :- Prince Philip said after Dunblane
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