If your load is from wind then you can increase the table values by 40% per section 2306.3.2. 10d's at 4" o.c. with 19/32" sheathing and 2x framing members is good for 425 plf * 1.4 = 595 plf and with a 4" nail spacing you don't need 3x framing at adjoining panel edges.
