.5" Expansion?

How are you guys managing .5" in girth expansion when you do girth work? I can clamp til my inner penis feels like it's about to explode and still get maybe .3. I warm up and everything. Does it take a while before you can work up to getting expansion like that, or should everyone be able to reach it?

I'm the same way. interested in hearing what everyone says too.

Its just a number 0.3/0.5 expansion. What is important is that you keep getting expansion and keep continue training untill you reach your goal.
Some people just get more expansion from the same exercise, just as some people get more length gain then others from the same exercise.
It could be the tissue off your shaft or your not agressive enough or maybe not enough time put in.