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They are likely relying on the plug to center the 209 primer in the bolt face. A 209 is smaller OD than a 22 Hornet rim. Very interested in how much of the 209 primer is IN the primer pocket.
When set up like this a 209 is extremely tough and virtually blowby free.
Notice how the rim of the 209 is recessed into and fully supported in the NULA bolt face and breach plug. There is no gap at all when its ready to fire in the action
Pretty hard for a 209 to bulge when it surrounded by steel and has no place it can go.
When set up like this a 209 is extremely tough and virtually blowby free.
Notice how the rim of the 209 is recessed into and fully supported in the NULA bolt face and breach plug. There is no gap at all when its ready to fire in the action
Pretty hard for a 209 to bulge when it surrounded by steel and has no place it can go.