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I sectioned some old-stock 165 grain 30 calibre interlocks and some new production ones. There is a definite difference in both the jacket thickness and depth of the interlock ring.
not to sure of your chambering or quarry but for a 160 7mm bullet i highly recommend the HPBT sierra Game king. I shoot them very accurately out of my 7mm-08 out to 600 yards when ringing steel, but they also work very well on deer as well with 250 yard shots giving compete pass threws with dime size entry and 4" exits usually taking out the lungs and or heart and very little tracking. It has proven to be a very tough bullet for me and i would probably still be using them if it wasnt for me wanting to experiment more and try out the 139gr GMX..... the 160's are loaded over 4007SSC and leave the barrel @ 2650FPS and all thought not the most ideal bullet if its all i had im sure it would drop a moose..... but i got a 338-06 for that loaded with 215gr Sierra game kings and 210 nosler partitions. Both traveling 2750fps