I could use some advice &/or wisdom. Bought my 1st AR-15 in 5.56/.223 from Vision Armory over in Middlebury. Shoots factory and fmj handloads like a dream. Does anyone have any experience casting and shooting lead bullets out of a gas operated AR-15 platform? It has a 16" barrel with a 1/9 spin. 55 gr shoot fine and I believe heavier bullets should be OK as well. I'm just wondering about lead.