From what I understand off of Ray's website he loads his 4x5x7's with 1/4 the load being #4's, 1/4 of the load being #5's and 1/2 the load being #7's

The chart on there says that the #7 Hevi-Shot has 342 shot per ounce, the #4 shot has a 107 per ounce and the #5 shot has 180, lets add them up and that should be close to telling how many shot is in one of his 2oz loads.

342+54+90+=486

There should be somewhere around 486 shot in one of his 2oz 4x5x7 loads, and the 2 1/4oz loads should have about an 1/8 more.