What is the avg. pressure difference between say NitroMag 2&3/4" and easier on shoulder standard game load of 1 oz or 1&1/8 load with published muzzle velocity of 1250+/-50fps? Many standard US made game loads sold in USA are also sent into EU, therefore, the box contains CIP monogram with M designation which probably means CIP Magnum. Walmart stopped carrying Pomi tomato juice and now carry some kind of Hunts or Italia Brand mad, but I did manage to score several boxes of very easy on shoulder leisure time target loads 12ga 2&3/4" 7/8oz 8shot with velocity of 980fps. My uneducated guess as to pressure for these would be around 7000psi. I wouldn't use those to hunt upland birds but for backyard clays round these should be good especially out of 6.5lb game gun with checkered wooden butt plate.