Just got my Sherman build done and have been fireforming brass. Would like to see what some others are using for loads,powders, bullets and COAL'S. I now have 50 rounds of fireforming done. I have been using hornady 147 bullets over 56 grains reloder 23 powder. I average 3000 FPS with this and also get what I consider very good accuracy. I have been seating them at 3.438 which was just a quick guess as to what to use. I just drilled and tapped a case to use a Hornady gauge and measured the COAL to be 3.520 for the 147,s and 3.500 for 142 SMK. Please feel free to share what you use for loads and how the work for you.