This video details how a deep cleaning process, inspired by Ron Spomer's advice, restored the accuracy of a Sako 90 Quest rifle. The rifle's accuracy degraded from sub-MOA to 2-inch groups, suspected to be due to fouling from lead/gilding metal bullets affecting all-copper bullet performance. After cleaning to bare metal using SC14 and a borescope, accuracy improved to an average of 0.64 inches.
The Sako 90 Quest in .300 Win Mag demonstrates exceptional sub-MOA accuracy even with a novice shooter, achieving tight groups at 100 yards despite wind. While initial attempts at a mile were hampered by scope limitations and visibility, the rifle proved capable of extreme distances with appropriate ammunition and optics. Key features include a carbon fiber stock, adjustable trigger, and smooth action, making it a high-performance precision rifle.
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