Just thought I would pipe in. I didn't see anyone mention the reason Keith designed the bullets the way did and that is simply to help misaligned cylinder throats with the barrel.
In that fact alone these bullets have a tremendous advantage over the LBT. I shoot both. I like both, but if you ever have trouble with an LBT style bullet shooting well , it may very well be you have slightly off centered lock up/alignment. Just recover some bullets and you can easily see if you bullet is hitting on one side. The true Keith bullet ( not semi-wadcutters) will align itself without deforming one side, the nice thing about that driving band.
Whether it cuts a full caliber hole or not I think is a not worth fighting over. As a bullet slows it will no doubtly start to cut on the driving band, but in reality velocity is what
will determine tissue damage and not the meplat. I've done a great deal of testing
with black powder using 45 Colt balloon head cases and 300 WFN's. I can achieve 975-1000fps with 40 gr of Swiss 3fg, a real boomer. However on a pig hunt, it took 4 solid lung shots to drop a 200 pound sow. But out of my Ruger with the same bullet at 1300 fps, the damage is extensive and immediate. But so is a 315 Keith at 1300 - 1400 fps.
Even Veral Smith will admit you need to shoot over 1400 fps to get his style of bullets to stabilize properly. And they will. A 265 WFN at 1800 from my Marlin will
drop those stubby's right into an 8" plate at 200 yards all day. But not from a Ruger Blawkhawk at 1200, they go everywhere. That same Blawkhawk will with a Keith bullet.
I like them both and use them both, but the reality is Keith did not design the bullet
to cut full caliber holes in either game or paper.
By the way Brian Pearce is as honest as they come and cut from the no nonsense
cloth Keith was. You all need to give him the respect he deserves.
Adios