I used to shoot the Swift Scirocco II 180 gr in my .300 Winchester magnum.
I really like this combo that was very effective whatever the distance and I killed many animals from jackals up to giraffe without any problems.
This bonded bullet usually keeps a big weight retention and in my collection, usually they are above 70 %, and even 80 %, most of the time. The lightest one I have found has "only" kept 61 % of its initial weight but it was found in a red stag.
In comparison, the Nosler Accubond 180 gr that I used before tended to lose more of its weight. I have never seen one, in this diameter, which kept more than 65 % of its weight. Most of the time, it was 50 % or so...sometimes a bit less. But they never let me down, even on tough games like zebras. In my rifle, the Accubond seems less picky to the seating depth than the Scirocco but both provided me a great accuracy.
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Bullets recovered in blue and black wildebeests, eland and burchell zebra.
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Bullets recovered in 2 blue wildebeests : 84.30 % and 77.7 %
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Bullets recovered in a giraffe
The first one, shot in the shoulder, was recovered under the skin in the opposite shoulder and it has kept 88.2% of its weight.
The other one, shot in the neck to finish it off, and that broke the spine, has kept 84.7%.
Unfortunately, I don't find them anymore where I am. Now I'm using Nosler Partition 220 gr.