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Sierra Match King 125 Grain Sierra product number 2121

Transcript of email conversation with ballistician at Sierra:

I inquired what max speed for this bullet (2121) is:
Oct 18, 2021, 7:33 AM
Max velocity depends on the twist of your barrel. With a 1-10 your looking at around 3600ft/s, will be slower with a 1-8 twist. Hope this helps
Oct 18, 2021, 7:45 AM
Thank you. That is very interesting. May I ask what it would be in a 1 in 8 twist and in that twist should I see and improvement in stability.
Oct 18, 2021, 8:09 AMOct 18, 2021, 8:09 AM
These 2 bullets will stabilize properly in a 1-14 barrel. The 1-8 is way more twist than needed and can cause jacket separation at extreme pressures and speeds. There is no definitive answer for when this will occur, it depends on the barrel.
 

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