Are you guys really convinced the flex tip ammo is a significant improvement? I read an article in Rifle Magazine a couple years back where one of thier contributors did a test with 150 gr flat nose and 150 gr. boat tail pointed speers in a 30-30 Marlin. The trajectory, accuracy and velocity of the two loads was so close as to make no difference out to 300 yards. With that said I have used the flex tip 325gr 450 Marlin ammo and like it a lot. I don't think the rubber tip really does a whole lot though.