I've been thinking about running a 20" barrel on my 6mm instead of the normal 28". Anyone else running a shorter than usual barrel on their 6mm? I looked at GRT real quick to get an idea of the trade off, and it would put be at around 2600 fps running Berger 105. Reason I'm looking at going shorter is that a 28" barrel + 8" suppressor puts me in an awkward position when moving and just gets ridiculous.