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Hi Michael 10mm isn't gas checked --- Hard cast, gas-checked (except 10mm Auto) heavy-for-caliber lead bullets precisely matched with temperature stable powders and primers, all housed in highest quality brass cases. Ever-vigilant—always ready.

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HSM 10mm is not "Gas Checked". This is a rather weak "Bear Load" at 1041fps & 481lb-ft energy. If you have to send a "Care Package" to a Bear, send the very best : https://underwoodammo.com/product/handgun-ammo/10mm-auto-200-grain-hard-cast-flat-nose/