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243 super rock chucker

7K views 18 replies 8 participants last post by  catchysumfishy 
#1 ·
Anyone load them ?? i need some !!
 
#8 ·
It's a .257 Roberts necked down with a 32 degree shoulder!

The 243 Rockchucker was the most popular of the 243/6mm wildcats available. Then one fine day Winchester tm introduced the 243 Winchester tm as a factory answer to the popularity of the 243/6mm wildcats that were thriving at the time, this spelled death for the 243 Rockchucker, although there are still people shooting that wildcat.
 
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