I was loading my first 50BMG rounds today and got a little worried about the force required to seat the bullets. I have a Hornady 50BMG kit and I have FL sized the IMI brass which I have trimmed and chamfered. The bullets are 800gr. drive band solids from Lutz Möller. .50 " BMG I loaded 20 rounds and there was much difference between the amount of force required to seat them. Some of the rounds took so much force that the press was flexing so the C.O.L varied .02". I measured all the bullets. They were perfect. What am I doing wrong?