I found these cut-away pics of the .284 caliber 139 gr and 154 gr. The jacket on the 139 gr SST is noticeably thicker than the 154 gr and therefore should hold together better.
I know this thicker jacket is not that uncommon from bullet manufactures but in most cases there's a reason it is done, ie the 120 gr Nosler BT and steel silhouette shooting, but in this case I wonder why?
Last edited by Highoctane; 03/11/18.
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