do you want a .308 bore like the sweds use on there mosins or a .311 bore? will you be reloading? there are 20"x1" blanks on GM,s site right now for $30 buy one and have it chambered turned to you needs. Im going to do a x39 with a straight 1" od barrel . I started a barrel makers thread check it out thereare several who make .311 blanks. Mcgowen is a good barrel but not dirt cheap. it all depends on what your looking for inregards to accuracy. IMOO 20" might be a little short for a x54r but it wsill certanly work. might lose a few FPS over say a 24"NEED A 7.62X54 HEAVY BARREL FOR MY PSL PROJECT. ANY GOOD IDEAS?
I dont have x54 reamer But I think turbo this on the AK forum might. if you buy or rent the reamer I can likely chamber it for you for a small fee.