In a modern action with that long of a barrel id say 2900 fps may be possible, but... will it be most accurate at that velocity? Maybe and maybe not. From what I've seen the SE likes slower powders and less than max loads. Id start with .260 remington loads and work up safely. What's the intent of your rifle? What ranges? Be confident that at any ethical range you'll have enough gun to do the job on most anything in north america with 2700-2800fps. The 6.5 mm calibers are much more deadly than many people give credit for.
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