trimming
For uniformity (the key to accuracy) rifle brass should be at least checked after each resizing, or every other time if neck sizing. The Lee trimmers are a cheap and easy way to go for most shooters. Lubing the necks with a tiny bit mica or graphite when resizing will help extend the brass life, improve concentricity and not contaminate the powder.
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"If the enemy is in range, so are you." - Infantry Journal
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