doublegunshop.com - home Forums General Discussion DoubleGun BBS @ doublegunshop.com Pressure vs. Velocity

Alliant 12g Reloading Guide
http://www.alliantpowder.com/reloaders/RecipeList.aspx?gauge=12&gtypeid=3

1 1/8 oz. at 1200 fps in Winchester AA case, Win 209 primer & WAA wad
Unique 21 gr = 9,100
Green Dot 19.5 gr = 9,300 psi
e3 17 gr = 10,450 psi
Red Dot 18 gr = 10,400 psi

1 1/8 oz. at 1145 fps in Winchester AA case, Win 209 primer & WAA wad
Green Dot 18 gr = 8,500 psi
Clay Dot 17.3 gr = 8,740 psi
e3 16 gr = 9,625 psi
Red Dot 17 gr = 10,000 psi

1 oz. at 1145 fps in Winchester AA case, Win 209 primer & WAASL wad
Green Dot 18.5 gr =7,600 psi
Red Dot 16.5 gr = 8,000 psi
e3 15 gr = 8,635 psi

I don't understand the higher grains of Green Dot in the 1 oz. 1145 fps load but checked several times to confirm