Screw lids when??

Yup!
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Hummmm....even the cheap 500 count .177 Winchester domes I bought at Tractor Supply, the 750 count .177 Benjamin Hollow points ordered from the internet and Crosman Premier Hollowpoints had screw on lids............





Perhaps buying a "sacrificial tin" of one of these just to empty the contents, re-label the tin, and add JSBs would work till your favourite JSBs are offered with "screw on lids.