Re: New .338 lanches a 300gr Sierra MK at 3500fps?
The 338-416 wildcats were pushed VERY hard back in the late 90s, early 00's to get some impressive numbers. Unfortunately, by their own admission, their brass life was only 1 or 2 firings at this level. To me that is not practical or even SAFE!!!
Since then, there have been a host of 338 magnums based on the 408 Cheytac parent case ranging from the standard 338-408 CT up to my 338 Allen Magnum with several in between. With a 300 gr SMK, these wildcats produce 3200 fps to 3450 fps depending on chambering and barrel length with good chamber pressures. By that I mean getting AT LEAST 6 firings per case.
3500 fps with a 300 gr SMK, that's pushing it off a Cheytac based wildcat. The 300 gr Berger is abit faster and would get you closer but in reality, there is no need. When you can get +3300 fps with a 338 cal 300 gr berger, that shoots lights out and hits like a mac truck, there is not a lot better out there in a system that is consistant over a wide range of bore diameters and barrel lengths.
This combo will do MUCH more then most of us will ever use in the field and offers us reach that again, most of us SHOULD never attempt on live game but we are already there and have been for many years.
The next step up in performance will likely not come in 338 caliber but in 375 cal when we get new, better bullets on the market to exploit the advantages of the slightly larger caliber. Get better barrel life with same ballistic performance now. With better bullets, I believe the 375 will become the ultimate bore diameter in the cheytac class case capacity range.
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