You're probably thinking of "The Silhouette". I was active from 1978 until the late '90's, but don't particularly remember such an article. In any event, the articles were written by members, who were not vetted, and may or may not have had any technical expertise, and no pressure testing equipment.
I shot 14" and 10" .30-30 Contenders in competition a couple times each month until about a year after the 7mm TC/U was introduced in the early '80's, and I switched to it.
I think anyone exceeding loading manual maximums in a .30-30 Contender is making a serious mistake, and will likely stretch their frame, or worse. My best accuracy was always achieved below maximum loads, and rarely failed to knock targets over. I still have and shoot that 14" 1978 gun.
It's your gun, but if you have loads above book maximums, I recommend pulling them down.