Great read. Testing and improving rifles. 0.050"-0.080" groups.
Alternative link: http://www.angelfire.com/ma3/max357/houston.html
Here is an intro from the Daily Bulletin, summarizing the article:
Legendary Indoor Accuracy — Secrets of the Houston Warehouse « Daily Bulletin
Kelbly Light Varmint PPC Rifle from Gunbroker.com. From the late '70s through 1983, a huge, concrete-walled warehouse in Houston was used for benchrest testing.

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