I have loaded the .45Colt for many years. I also like using H110-Win296, Unique, and have used Lilgun as well. I prefer to use Hard cast bullets but have had good luck with the xtp and Sierra bullets in 300gr.
When you use a heavy load, full length resizing can be needed. If you are loading to cowboy pressure loads then the full length isn't as important. Simply flaring the mouth to seat the bullets would be enough. I have the RCBS carbide dies so lubing the cases isn't necessary. If you don't have the Carbide or titanium nitride then you will need to lube cases.