so 5.8 grams of powder is 89.50 grains and and 35.5 grams of shot is 1 1/4 ounces. Therefore it was proofed to 1 1/4 ounce loads pushed by 89.50 grains of powder and whatever pressure that would create. But, one should probably stay well below what the gun was proofed for right? So, I'd be safe with 1 1/8oz loads at 8500-9000 PSI I would think - no?