Re: Drill barrel blank for gas ports
Much has been written about the best location for the port, i.e. in a groove, does not matter, etc... (all opinions). Here is my opinion based on those articles. Ideally the hole should be half in a land and half in a groove because it should minimize erosion of the hole, but since it is virtually impossible to time it exactly, and since the hole diameter required will likely be larger than the width of a groove anyway, don't worry about where in relation to land and groove the hole winds up - just drill it. And that too is a topic of discussion - drill into a lead slug - EDM to prevent burr creation in the 1st place. According to the book reference in my last post, he just drills it and shoots the burr off and that is what I did as well with no ill effect.