Just had one, a BLR 81 in .308 with a Leupold M8 4X, that was in the early 80's. Used Speer 150 Spitzers and Hornady 150 SP's in it with Win 748 and IMR4895. I loaded the bullets to the 2800-2825 fps range, this was measured with an old octal readout Oehler Model 12. It would group five shots of most all loads in a consistent 1" to 1 1/4". I was quite impressed with it.
