I must be one of the few people who use tightgroup instead of bullseye for the 45acp. I use nosler 180 match hp bullets and with 4.4g tightgroup oal. 1.233 very accurate in my colt 1911. Have also used bullseye 4.2g same oal but not as accurate in my colt, have used unique with 6.8 g and it is a hot load but acccurate. For all my work and cost I'll stick with tightgroup for my 45acp and for my 9mm , which is where it really shines.. A little goes a long way, which makes it cheaper to shoot if you load your own. That's about it.