bill hober told me to drive his swift bullets as hard as possible for best effect.
I have never driven them at warp speed so cannot comment further than the advice.
in my mind, barnesx would have been even better for being fail safe, but the above might suggest otherwise.
barnes appears to have, despite my belief, an upper velocity limit.
I must confess to using barnes originals in my 7mmstw for this reason, and cannot report any unexplained problems.
they shoot well enough and I still have a few hundred, so might never get to try the newer triple shock.
the barnes have made the stw into a gun for bigger game, and for small stuff nosler partitions are more suitable.
bruce.
Hi Bruce, interesting conversation regarding Swift A-Frames. I've been given the same recommendation. A couple years ago I had a great opportunity to test the theory of driving an A-Frame past what might be their "normal" velocity envelope while hunting Pronghorn Antelope. And while this is a test of only 2 individual bullets of the same caliber and weight, I suspect results might be similar on other calibers and weights until you get up into the real "heavy weight" categories.
Here is the result. While I don't consider the first one a failure (the result was a bang-flop and the projectile held together and retained a respectable percentage of weight) it is one example of a bullet that had an impact velocity beyond what would probably be considered optimum and the result on bullet expansion. This may serve as a good example of what the result may be on bullets used for DG that are driven beyond their working envelope. No issue at all on animals like Pronghorn. In fact, results like this may be just fine and dandy on PG. Not so much on DG.
Just a sample size of two, so not very scientific, but folks can take from it what they will.
Both animals were shot under very similar field circumstances, just different distance. Both were frontal chest shots with the animal facing the shooter. Obviously neither bullet exited the animal.
7mm 175gr A-Frame
Pronghorn Antelope - Frontal chest shot, facing shooter
Range - 84 yards
Muzzle Velocity 3100 fps
Impact Velocity - 2950 fps
Retained Weight - 154 gr
Expanded Diameter - .700”
Pretty Flat for an A-Frame but still intact
7mm 175 gr A-Frame
Pronghorn Antelope - Frontal chest shot, facing shooter
Range - 293 yards
Muzzle Velocity -3100 fps
Impact Velocity - 2540 fps
Retained Weight - 173.3 gr
Expanded Diameter - .610”
More of what you would expect from an A-Frame
The difference between the two being 410 fps impact velocity.