The article referencing the Remington 700 was in G&A in December '94. The title is actually "Lure of the Custom Rifle," and the discussion of the .22-250 is a few paragraphs on page 55.
He does specifically refer to it as his "absolute all time favorite rifle" which took "enough critters to fill several trucks." He never mentions it having a Shilen barrel originally, but rebarrels it with a Schneider 1-13 twist at Carolina Precision.
He never says it is Ackley Improved, but does say "The .22-250 cartridge is virtually perfect and I have an 'improved' chamber, so no change is needed there." I'm not sure if it could be anything but AI, but he never specifically calls it that. Regrettably there is no pic of that particular rifle in the article.
It's really fun to dig stuff like this up!
