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This is what I've always thought. Think about dropping a 20 pound kettle bell on each side of a carton. Stacked the CCI way, the plastic trays offer little protection to the primer faces. The primers are much better protected on their sides, but it is hard to set off a primer with a side impact in the first place unless you completely crush the primer. Struck on the face, the anvil wants to set off the compound. On the side, it instead fights against it. Stacked sideways in the trays, the sides of the primers are more vulnerable to impacts, rather, but the faces of the primers are protected by the plastic trays. The extra space might provide some additional protection against sympathetic ignition.

[QUOTE="meh, post: 7407501, member: 57020"] This is what I've always thought. Think about dropping a 20 pound kettle bell on each side of a carton. Stacked the CCI way, the plastic trays offer little protection to the primer faces. The primers are much better protected on their sides, but it is hard to set off a primer with a side impact in the first place unless you completely crush the primer. Struck on the face, the anvil wants to set off the compound. On the side, it instead fights against it. Stacked sideways in the trays, the sides of the primers are more vulnerable to impacts, rather, but the faces of the primers are protected by the plastic trays. The extra space might provide some additional protection against sympathetic ignition. [/QUOTE]

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