I had a WinApex aka Kodiak Pro and Ron's plugs were a HUGE improvement. I tried about 3-4 variations in it. I was really anal about keeping my OEM BP clear and it never miss fired BUT after Ron's modded plug it had much less blowby also.

Smokey92

Look at sabotloader's pic and you will see the vent liner. It is basically a replaceable flash hole and will likely never erode since it is made to Savage smokeless specs and very hard compared to any breach plug material.

I think currently Ron is using a different style without a liner but i dont want to speak for him. His new "Omega type" design has worked great and is also made from a much harder steel. I have used the mildest primers available (WinT7s) with all of his plugs without a single hang fire with BH209 down to 40F.