Any info on the BTR1 reference lines in terms of MOA? Bushnell lists the center dot as a 100yd zero, then 300, 400, 500, 600yd lines. Says calibrated for 55/62gr ammo. Doesn't specify barrel length. I found a source online that said the lines are 4.5, 8, 12, and 16.5 MOA. those two figures don't really jive very well unless I'm looking at the standard drop charts wrong. Think they are "close enough" that those MOA figures might be right?