Swift bullet question(s)

[Larryjk]

I don't have any definative information but. The Swift bullets have a fairly heavy jacket and this may be the reason they aren't loaded as fast. We use them in the 300 UM and the .264 Mag. I would think the heavy jacket would keep them from obturating as easily and keep pressure down, but apparently this isn't true.
I always tell my son that a prairie dog, antelope, deer or elk never knows how fast the bullet was going that ends their career.
If they are accurate and perform well, speed is not a serious consideration.