I was just loading some 358 loads. I had different cases. Some were from military 308 and some were Winchester. I had others but these two stuck out. I tried some printed TAC loads in the Winchester and the powder charge came up to the base of the neck in the Winchester case. The same powder charge in the military case came up to nearly the top of the neck. I poured out powder in the military case until the level of powder was the same as the fully loaded Winchester case. The difference in powder (TAC) weights was 3 grains.
Be careful in using the same brass as what the author used. If the author doesn't state what primers/cases/bullets he/she used, be careful when using their incomplete data!
