I was reloading 45 colt with Universal and 255 gr lead SWC. I have a Lee turret and Auto-disk and was shooting for 8.0 grains. After fussing with it and having a hard time getting it dialed in, I settled on 8.4 as close enough. (This is for a Ruger Blackhawk so I wasn't worried about a slight over-charge)
After getting about 25 rounds complete, I take another look at the scale and see it is set for 7.4 grains; which explains why I had to keep dialing down the disks to get it close. The data I have puts 8.0 as the minimum charge for this bullet. The SWC doesn't have enough of a place for my bullet puller to get a grip on it. SO the question is this - is a .5 - .6 undercharge dangerous with Universal? Will this produce hang fires? Or will this be an even softer load?