6mm ARC

[VASCAR2]

The heaviest longest 6 mm bullet I checked on the Berger stability factor web site was a 115 grain hunting bullet at 0 degrees and sea level. The 1.75 twist had marginal to poor stability with the 115 grain bullet but 1.7 was better. I checked a 65 grain target bullet under the same parameters With 1.7 & 1.75 twist and both were gtg.

https://bergerbullets.com/twist-rate-calculator/