I have a CZ 455 with a Lilja barrel that was made before Lila incorporated the shimming provisions of today. It is 20.5" long and is a straight 0.900" outer diameter. The barrel does well with Lapua Center-X and SK Long Range. I was thinking of getting a Harrell tuner to squeeze out a little bit more hopefully, but I have been hearing that for heavier bull barrels, that a Harrel may be too heavy? It's counterintuitive to me but I heard that heavy barrels may need LIGHTER tuners (if they benefit much at all). I was hoping to get some advice on the Harrell tuner and 20.5" bull barrels. Any other good information before taking a plunge like this is also appreciated. Stay warm out there!
Don
Don