Loading 30-06 with 168 gr SMK, 58 gr of IMR4350. This is out of the Speer manual (only one I have at the moment), and I am matching the bullet weight and using the tables from there. No pressure issues that I can see and according to Speer I have another grain to go before max charge. Another thread here suggested that Sierra's suggested max load was way below where I am now. Is it necessary to use the specific reloading tables for bullet brand/type? Thanks.