Has anyone experienced failure of the Drive Block on their MKA other than myself ? This is an early serial no. MKA which I purchased about a year ago and only run 1500+ fps slugs through it.
First failure was noticed during cleaning after a range day of 100 - 150 Winchester Rack Master 2 3/4" Slugs which appeared as a small "blowout hole" and hairline crack on the underside of the Drive Block along what appears to be either a weld seam or forging seam. At that time, I had run about 400 to 500 rounds through the gun over three months without any signs of failure.
I contacted Clyde at R