Its kinda interesting, I've tested a 22-243, 257wsm, 300 rum, 338 rum, 338 lapua and a 375 rum all these rounds are fairly fast and I was shooting X bullets but the penetration in magazine's was all practically the same- 14 to 16 inches indifferent of caliber. The major difference was the wound channel. Kinda funny the 257wsm was the 16"er. But now I'm shooting Matrix and Berger and they are just messy! 6-8" then a huge blow out.
Chris
Benchmark
Chris
Benchmark