It seems that many folks are leery or wary of BPI data. I will admit that their 3" 20 gauge steel shot data was nasty enough to destroy 1/3 of my hulls on the first loading. Ripped portions of hull clean off. I toned them down.
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Joined: 12 Mar 2005
I've found the Z16 one ounce wad w/ 28 ga. filler wads to work well for reduced loads in Cheddite type cases. The wad OAL is a good fit in roomier hulls, and the diameter is big enough to prevent powder migration. Most importantly IMO, the shot cup is deep enough to accommodate both the filler wads and the shot column w/o exposing too much shot to bore scrub.
I also don't trust BPI data after my bout w/ their overly hot 28 ga data about 20 years ago. I had purchased their 28 gauge load booklet, and followed the data for one of their 7/8 ounce loads exactly as printed. The resulting loads actually stretched the hull mouths unevenly on a couple of my once fired WW AA hulls. Talk about hot--WOW!!! The loads were fired in a Citori 28 ga O/U. Thankfully, the gun is hell for stout. Stiill have it, and it's still banging away w/o so much as a hiccup.
Anyway, I called BPI to warn them about the problem. All I got from them were accusations of not following the data or screwing up some other way. So much for that episode. No more for me thanks. I like me fingies exactly where they are.
Joined: 01 Dec 2005
Baschieri & Pellagri (B&P) makes the wad Ballistic Products Inc. sells as the Z-16 Commander. B&P call it the Z2/M. Precison reloading sells this wad as TUW22M16GA. The wad Ballistic Products sells as SG16 or Sporting 16 and also sold by Precision Reloading as the TWG2116 is made by Gualandi as the BRG 16/21. The wad Ballistic Products sells as SG16S or Sporting 16 Short and also sold by Precision Reloading as the TWG1816 is made by Gualandi as the BRG 16/18. None of these is strictly interchangeable, even though there is no outside dimensional difference between the SG16 and the SG16S -- the only difference between these two is that one sold as "short" has "blades" molded into in its over-powder cup and the other one has a small farm of little rod-like projections inside its over-powder cup. The wad from B&P (Baschieri & Pellagri), the Z-16 is intended for greater shot charges, but whatever fits works. If I remember correctly, the testing results from the Low Pressure Group show very little pressure difference using any of these wads. Anyway, the pressure difference amounts to a gnat's a55, considering the allowable pressure level (SAAMI) for guns with fluid steel barrels (not twist or damascus). When choosing between these wads, use what fits.
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