01-30-2014, 05:55 PM
I have been using a nylon brush to carefully remove the burs, along with a Dewey rod and guide. Not all of the barrels have it, but many do. Lilja was careful to not blow through the bore when drilling the ports, so there are some residual burs from the gas port drilling.
I have also seen this on high-end Super Match Douglas barrels for the SPR, but the owner fired his bur out and caused some gas port damage that way. The gun still shoots, but has a large gaping void on the down end of the port.
Just run a nylon brush carefully through the barrel from the breech end, and you will feel it hit the burs. Once the brush exits the muzzle, remove the brush, and withdraw the rod.
I have also seen this on high-end Super Match Douglas barrels for the SPR, but the owner fired his bur out and caused some gas port damage that way. The gun still shoots, but has a large gaping void on the down end of the port.
Just run a nylon brush carefully through the barrel from the breech end, and you will feel it hit the burs. Once the brush exits the muzzle, remove the brush, and withdraw the rod.