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20 bore home load crimps


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All different sizes and shapes, will pattern differently.

 

Even a few milimiters in the closure might increase or decrease the pressure and result in different patters.

 

My advise: use some sort of stop to get them all at the same height, anything between 59.5 to 59.9 mm should do for more recepies.

 

In general slow burning powder will require a lesser deep crimp and progressive one a deeper crimp.

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All different sizes and shapes, will pattern differently.

 

Even a few milimiters in the closure might increase or decrease the pressure and result in different patters.

 

My advise: use some sort of stop to get them all at the same height, anything between 59.5 to 59.9 mm should do for more recepies.

 

In general slow burning powder will require a lesser deep crimp and progressive one a deeper crimp.

You don't say? (British saying!)
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