The down side is none of my brass fit the new rifle. The new Ruger has a much tighter chamber. I am going to have to resize everything I have (including loaded ammo). I'll have to pull the bullets and full length size them all.
I had mine tight enough that I didn't have to worry about it falling off at anytime. Then I would tighten it 1/8 turn at a time and watched the groups improve until they started to open back up and I then backed it off.
Others have taken the fore end and lightly sanded some wood at the contact points on the barrel and breach area to get better groups