Have a box of Swift's A-Frame 9.3x62mm factory ammo that I finally got around to capturing some MVs.

Their website says figure on a MV of ~2,400 fps from a 12-twist, 24" barrel. Mine is a 10-twist, 24" barrel.

Cool, I'm thinking I can expect MVs of somewhere's around ~2,350 - ~2,400 fps.

Nope. After first "warming up" the barrel firing 2 handloads (it was 39 degrees out), the 1st A-Frame round: 2,300, and the 2nd A-Frame round: 2,310. I stopped after that.

Either I have a seriously "slow" barrel, or Swift needs to update their website ammo specs page.

I pinged Swift to find out what gives...


It's you and the bullet, and all the rest is secondary.