Either way I ask this question it goes in this thread...I'm haveing a gun built right now in 300RUM with a 1-8 twist barrel (not too late to change) for 200-220gr bullets. Well now I'm thinking I might want to use some 180grainers sometimes. No specific bullet choosen yet, considering starting with the SMK's and Accubonds. My question is...are there 180gr bullets that can handle the fast twist or should I consider a slower twist barrel? If it's not obvious, I'm new to making these decisions. Thanks for all imputs.