I have no experience with the later, alloy receiver guns, but the -70's steel receiver BAR & BLR, I had were about even - with the same sighting equipment (scope-to-scope or peep-to-peep, etc - and not scope-to-peep).
As a matter of fact, they were also as accurate as the boltguns I owned at that time, since they both were front lockers, too.