Stallones

If it's of any help, Lyman's 5th has several PB loads listed for the 3 1/2" 10 ga. All 1 5/8 oz loads. Pressures range anywhere between 8500-9800 psi. Charge wts are 32.5-36.5grs. It would seem you are pretty safe where you are starting out.

Cheers
Marcus