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Barrel life
Jan 25, 2018

1. Spread radius growth - the general provisions of the shooting distance at 100 meters, including the total number of shells 50% of the circle radius of 2-2.5 times the beginning of the shooting, the barrel life ended.

2. The number of bullet points oval hole ---- 100 meters on the distance of the main target shot, the target hole on the long axis and short axis ratio greater than 1.2 can be considered as oval hole. When the small-caliber oval hole firearms up to 20%, 50% of large-caliber guns, the barrel that life expectancy ended.

3. The initial rate of descent exceeds the allowable value ---- the general allowable value, small-caliber guns of 50%, large-caliber guns of 10%, that the barrel life ended.

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