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Posted: 10/22/2004 8:18:17 AM EDT
Hey guys, how do you drill the gas port hole in the barrel without raising a burr in the bore....or do you drill the hole and remove the burr after somehow. Help on this is appreciated before I buy a "holeless" barrel. Thanks - Charles
Link Posted: 10/22/2004 8:40:39 AM EDT
[Last Edit: 10/22/2004 8:41:15 AM EDT by SBR7_11]
Just drill it slowly.. If there is a burr, like asked about here commonly, just shoot it out.

I suppose you could "EDM" the gas port.
Link Posted: 10/22/2004 3:07:28 PM EDT
Use a centering bit to start your hole. Drill very slowly, avoid overheating, and let the drill bit do the work. If possible switch to a brand new, extremely sharp drill bit immediately before breaking through the bore wall.
Link Posted: 10/22/2004 7:17:24 PM EDT
No no no! Have it EDM'd if you want it done right. Short of that, force a pulled bullet down the bore to the point of the port; lock the barrel in a set of V-blocks, locate & center punch or mill a flat, then locate; use a center drill to start, then a brand new screw machine bit to finish into the bullet.
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