Originally Posted by rfpalm
I can't find where now, but I read a post on the varmint gernade stating that no faster than 1/14 or 1/12 twist would be needed for this bullet. Apparently it opens too soon with faster twist.
The only warnings for twist rates that I have seen on Barnes bullets say "Faster twist than". Lead Free bullets are longer than lead bullets of the same weight so you need faster twist rifles to shoot the same weight bullets.
That is why they make a 36 gr 224 Varmint Grenade and a 62 gr 243 Varmint Grenade bullet. Most factory bolt action rifles will not stabilize the longer Lead Free bullets that weigh more.
Right on the box of Barnes 224 cal 50 gr Varmint Grenades it says a 1-10" twist or faster is needed.
The only good thing about Varmint Grenade Bullets is the name "Varmint Grenade".