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What loads are the Model 11-87 Super Mag shotguns designed to cycle?

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The Model 11-87 Super Mag is designed to cycle 3 ½”, 3” and 2 ¾” loads down to 3 1/4 drams of powder and 1 1/8 oz of shot. When shooting 2 3/4" shells you may need to install a barrel seal activator for more reliable function. The barrel seal activator creates a better gas seal exerting more pressure on the gas cylinder. The activator should be removed when shooting 3” or 3 ½” shells.

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