Hah! I stand corrected, Rory. I forgot about that experiment you and I collaborated on many moons ago. Could be I also had .22HP dimensions rattling around between my ears.
Don't forget too that elevation, humidity, temperature, velocity, and alignment of the moon and stars has a bearing on whether or not a bullet will stabilize in a marginal rate of twist. What doesn't work for me down here at sea level may well work for a shooter in the rarified air of higher elevations out west.
All very true. Gotta pick out a 250-3000 to use next month and get it sighted in. Time to hunt with a 25, probably use Hot Cores.