Hi guys, noticed this post the other day. If its any help to you, you'll find the bullets I make perform in the same way as the Berger hunting bullets do.
They will penetrate & then start to fragment causing huge amounts of internal damage which causes animals to go down quickly.
When you pick an animal up they are usually all "slushy" sounding inside, you'll know what I mean if you've shot a few animals.
I have a lot of hunters using these with very good results.
Hope this helps.
Cheers.
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