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If you have had experience of hand loading 338 lapua magnum, can you please share the consistent SDs/ES that you have been able to achieve on any 300 grain bullet? I am new to 338's but want to know, what is achievable and a challenging goal.
So why is a 5 shot the standard for groups but not for velocity? I’ve been seeing a lot of discussions lately about SD numbers being useless without a large sample size. I agree that the SD may be unreliable with a smaller sample size but I don’t think it is completely worthless. I use the 5...
www.snipershide.com
The 338L should be no different than other centerfire cartridges. If you achieve a SD of 10 to 20 feet per second on a statistically significant sample you are doing well. When you get to single digits you are in a region where you are are loading extremely consistent ammunition. However, don’t get hung up on single digits. Unless the statistics are based on a large sample, comparing a 5 to a 10 SD is a waste of time and components.