I have a lee reloading manual and it says not to shoot reloaded 40s&w through a glock because of its lack of a fully supported chamber. Is there any truth to this? I just ordered dies and some 40s&w bullets to load in my G-27 and my M&P40. The M&P should be fine but am I gonna have to order a after market barrel? Wanna kill these ads? We can help!