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The bullet is more properly termed a Class III wadcutter, or a “semiwadcutter wadcutter” that seats similarly to a conventional SWC…..that is, roughly half of the bullet is out of the case when seated to its crimp groove.
Who cares? Well, for rifle use, including .30’s like .308 and .30-06, this means the bullet won’t protrude below the case neck even in short necks like 308’s given that your rifle has any throat at all. The bullet can be seated to touch the rifling origin while still keeping base protrusion below the neck away.
In rifles, it is not a long range bullet. Accuracy holds to something over 60 yards, then groups expand to a foot at 100 yards, which is a precursor to tumbling. It is safer than conventional .30 caliber bullets for shooting up into the trees, as the bullet tumbles and likely will fall to earth within about 6 to 700 yards. Its danger space is considerably shorter than a .22’s. There is probably no finer bullet in existence for squirrel hunting when safety and accuracy are considered.
From actual chronographing near the muzzle and at 50 yards, the bullet has a 0.060 G1 BC. Best use in rifles is in the subsonic range of 1000-1050 fps or so.
Sizing it down to .311″ for my .308 rifle produces good accuracy as long as the sizing die is the nose first type, or assuming your lubrisizer has a well aligned top punch.
I would like to see a diameter of .315″ to fit 32 revolver cylinder throats.
I find this to be a real dual use bullet and shoot quite a few of them every year. Miserly on lead, accurate with limited range but fine for all realistic small game hunting. All appealing factors for me.
Here’s a link to some load testing I did that may be of interest for fence sitters.
http://castboolits.gunloads.com/showthread.php?269411-Shooting-a-Lopsided-32-Wadcutter-in-a-308
Swede, bullets are on the way.