Obviously "trainor" does not equate to "trainer" nor a "read person" on ballistics, reloading of rifle and pistol ammunition to include weaponry applications. So I will not honor nor enter into a whiney contest of name calling.
I do though suggest trainr, you should do some research on your earlier statement. As mine is based on fact from personal experiences, research, combat, training of Marine Corps basic troops from boot camp to advanced Infantry training heading to Nam, as a Marine Staff NCO, as a US Army Officer and as an Army Engineer Acquisition professional. If this causes me to be considered a "moron" in your world so be it.... Alas, my years of training and my life work for myself, other Marines, Army Soldiers, NCOs, and Officers including NATO troops on weaponry and tactical applications was to no-avail..... I am fully retired twice and am quite content with myself, my knowledge and what others have expressed as to my expertise in military weaponry and usages.
My comments to the originator of this discussion still stand. I apologize to you, the originator, for my frank comments but do consider them as one would consider "trainor or trainer" -- whichever comments you think is more accurate use.