No more then one would expect with a new gun. It is stiff opening and closing. I have only shot a couple of boxes through it since I bought it. As noted, the extractors seem to sit a bit high and this does result in the grooves designed to hold the brass not matching which causes the brass to sit higher then the edge of the barrels on the outside and top. Out of the 2-3 boxes I have shot through it, the lock up has occurred on only two occasions...both with reloads
|