I just put a AK47 style brake on my SAR1, and the bullets are being slightly deflected by it thus being detrimental to my accuracy. Should I open up the bore of the break so that bullets do not get deflected by it?
I've had a lot of Muzzle breaks as well as Flash hiders on my AK's over the years, never had one that was put on "strait" deflect any bullets? I'd recomend Looking stronly on how it's mounted and use a pievce of fishing line down the barrle to see if the break or Flash Hider is strait? If not, remove and re-install? How is it secured screwed on threads or clamp on or a allen screw to hold it? If an allen screw they can loosen up and let the break or flash hider tilt? Might be your problem, No, you do not need nor should you drill it out? Check all the mounting first? Then if all else fail,s see a smith and let him look? Save yourself some flesh and grief?
If the brake is not screwed on, you may want to thread the barrel of your SAR-1. ATAK, Inc. rents the threading device for $23 shipped to you and you pay to ship it back to him. If you are interested in renting, you can go to this thread to contact him: http://www.gunsnet.net/forums/showthread.php?t=317428. The thread will be the authentic 1:14 LH thread.
Several years ago, I threaded the muzzle of my SAR-1 and it’s not that difficult to do. However, if you don't have access to a vise to hold the rifle in a secure vertical position, you will need a friend to help by holding the rifle steady while you do the threading.
If you do thread the barrel, be sure to use a U.S. made muzzle device so that you stay within the 922R regulations.