Who else has a Ruger SA center pin MIGRATING?

[Adam Helmer]

I have a Ruger Superblackhawk .44 Magnum that will not HOLD the center pin in its proper place when the gun is fired, thus tying up the handgun. I have sent the handgun back to Ruger TWICE, they replaced the centerpin and lock (twice) and it STILL migrates toward the muzzle when fired with magnum loads!

With heavy .44 Special loads, the center pin will "WALK" forward by the 6th round!

Some folks say there is an after-market center pin that will stay put in a Ruger Superblackhawk. I would like to try one of them, so who sells them?

Adam