i have a 18 inch mid length ar 15 1 in 8 twist 223 wylde. i'm using once fired lc brass. not looking for load data, i have virtually all the load manuals, rather i'd like to know if anyone has loaded Wideners 75 gr bthp with the two powders in the title. i'm looking for velocity and accuracy. i have both powders and would like to know if one is prefered. temp sensitivity if you know it. i did a search in reloading here. i've been reloading for 40 years though not for 223