In carrying out 223 blanks I dimension and key situation as normal. I use involving 7 and 8 grains of Pink Dot. That gives it an excellent loud sound and is consistent. I use a C H crimp die to complete it off. Sometimes the shoulder will buckle a little https://strapweaponshop.com/product/triple-r-munitions-223-5-56-nato-blanks-100-rounds/