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357 headstamp question

2pounder

Well-Known Member
Premium Member
not really into small arms and .357 is questionably military but have a case headstamped 3-D 357 MAG wondered who the maker was. thanks
 
Various company names, I don't know the time scales.

3-D Company Inc.,
3-D Investment Co. Inc.,
3-D Ammunition and Bullets.,

Doniphan, Nebraska, USA.

(At least some cases were made by Starline)
 
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