I have the B14 HMR in 22-250 and specifically bought it to shoot the Barnes 50g Varmint Grenade. I see a lot of comments regarding bullet weight but it’s really about the bullet length. When it comes to twist rate, bullet weight is irrelevant.

Maximum Stability (usually measured as gyroscopic stability (Sg) but sometimes measured as Dynamic Stability (Sd)) is the magic pill we all pursue when matching a projectile to a platform.

The projectile length, it’s center of gravity, and to a point, its velocity are the key factors in determining the optimal twist rate. Manufacturers strive to develop projectile where the sciences all come together while still having some forgiveness so folks can tune their loads… Barnes for example is clear that the 50g VG requires a 1:10 twist or faster… there is a correlation between weight and bullet length but I used this example because the VG uses a powdered aluminum core and even at 50g, it’s longer than most 60’s…