Originally Posted by Whiterabbit
delrin has too much give and will lock up in a barrel. Ask me how I know.
Wood can fracture, then you have the opposing wedge issue. That will lock up a barrel RIGHT quick and you'll be up poop creek.
I disagree. I want the softest material that I can find to shove down my barrel. I know brass is way softer than my barrel but I still prefer the delrin. To keep from locking up get a the largest rod you can fit down the barrel so it has no room to flex.
I will share my opinion and my load data, BUT I am just a guy with too many cigars and too many guns. Whatever I say is probably wrong.