Quick Answer
To clean a .270 WSM barrel, use a solvent like Hoppes No. 9 or Break-Free CLP, followed by a thorough brushing with a brass brush and a final wipe with a clean cloth. This process should be repeated every 5-10 shots, or after each elk or deer hunt.
Choosing the Right Cleaning Tools
When cleaning a .270 WSM barrel, it’s essential to use the right tools to prevent damage and ensure effectiveness. A brass brush is the best choice for cleaning the rifling, as it won’t scratch the finish like a steel brush can. Use a brush with stiff bristles and a diameter of 0.010" to 0.012" to fit snugly in the barrel.
Solvent Selection and Application
The choice of solvent is crucial when cleaning a .270 WSM barrel. Hoppes No. 9 is a popular choice, but Break-Free CLP is also an excellent option. Apply the solvent to the barrel using a patch or cleaning cloth, working it into the rifling for about 10-15 seconds. Then, let it sit for 30 seconds to allow the solvent to penetrate and loosen the grime.
The Cleaning Process
To clean the barrel, start by passing a patch or cleaning cloth through the barrel, working it back and forth for about 10-15 strokes. This will loosen the grime and push it towards the muzzle. Next, use a brush to scrub the rifling, working it in sections to ensure thorough cleaning. Finish the process by wiping the barrel with a clean cloth to remove any remaining solvent and grime. Repeat this process every 5-10 shots, or after each elk or deer hunt, to maintain the barrel’s performance and longevity.
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