I don’t cast but shoot both HyTec , PC’d and lubed cast along with a few J bullets. I do use BLL on the lubed. For me I have found that the first shot out of a cleaned barrel will always be outside the normal grouping, even if the barrel was cleaned months ago and never shot, no matter the temp. I always shoot a fouling shot before I take a rifle hunting or paper punching practice. It’s been that way for me a long long time.