From an alliant handloaders guide & using the same hull & primer I find a load which pushes"
1 3/8 oz of shot to 1200 fps @ 8,100 psi & a load which pushes;
1 1/8 oz of shot to 1200 fps @ 9,300 psi
But to answer your question, yes the pressure is higher for the 1 3/8 oz load IE the total average pressure is higher. The heavier load is with Blue Dot while the lighter one is with Red Dot. The Red dot load peaks higher, but also falls off faster so the total area under the curve would be less. Thus yor statement that for a heavier pay load the pressure is higher is true, as long as you understand this has no reference at all to the actual "Max" peak, but the total average pressure. Does this make sense??
