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- 01 Jan 2020, 17:13
- Forum: 5.7x28 Reloading
- Topic: Subsonic loads go unstable only with can
- Replies: 14
- Views: 11333
Those bullets you are trying are maybe just too long for 1:9 twist. Berger has a calculator you can use to research that at https://bergerbullets.com/twist-rate-calculator/ More grain weight at the 900-1100 fps subsonic velocity is more worthwhile than a lighter bullet at the same velocities. In 1:9...