Quoted:



Given Brenneke USA's recent QC issues and the unfortunate unavailability
of true Rotweil Brennke loads in the U.S. currently, we have been
looking for alternative slug loads that are capable of adequate
penetration after first defeating intermediate barriers.  We shot the
new Federal (PB127 DPRS) Truball Deep Penetrator 1 oz slug load @ 1350
fps (http://www.federalpremium.com/produc...ug.aspx?id=902).
It penetrated 24" of gel after first defeating an automobile
windshield, with no deviation from trajectory and outstanding weight
retention.  The Federal Truball Deep Penetrator works as a potential Brenneke replacement.  As a bonus, it is very accurate out to at least 100 yards.





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Based on IWBA data, Don Hacklander from San Diego Police Supply and I
have been discussing the potential of a properly designed #1 buckshot LE
load for many years––with Don's help and the efforts of some folks at
ATK, this has now finally been brought to fruition!





We shot the new Federal #1 buckshot, 15 pellet, 1100 fps "Flight
Control" load (LE132-1B)  yesterday out of a generic 18" 870P, including
patterning from 5-35 yards, as well as a bare gel shot at 7 yards. In
bare gel, all 15 of the 30 caliber plated pellets penetrated in the
14-18 inch range.





This new Federal LE132-1B #1 buckshot load offers IDEAL terminal
performance for LE and self-defense use and is the best option for those
who need to use shot shells for such purposes.

Quoted:
Why is this considered superior to 00?

Number 1 buck is the smallest diameter shot that reliably and consistently penetrates more than 12 inches of standard ordnance gelatin when fired at typical shotgun engagement distances. A standard 2 ¾-inch 12 gauge shotshell contains 16 pellets of #1 buck. The total combined cross sectional area of the 16 pellets is 1.13 square inches. Compared to the total combined cross sectional area of the nine pellets in a standard #00 (double-aught) buck shotshell (0.77 square inches), the # 1 buck shotshell has the capacity to produce over 30 percent more potentially effective wound trauma.

In all shotshell loads, number 1 buckshot produces more potentially effective wound trauma than either #00 or #000 buck. In addition, number 1 buck is less likely to over-penetrate and exit an attacker's body.

For home defense applications a standard velocity 2 ¾-inch #1 buck shotshell (16 pellet payload) from Federal, Remington or Winchester is your best choice. We feel the Federal Classic 2 ¾-inch #1 buck load (F127) is slightly better than the same loads offered by Remington and Winchester. The Federal shotshell uses both a plastic shot cup and granulated plastic shot buffer to minimize post-ignition pellet deformation, whereas the Remington and Winchester loads do not.

Second best choice is Winchester's 2 ¾-inch Magnum #1 buck shotshell, which is loaded with 20 pieces of copper-plated, buffered, hardened lead #1 buckshot. For those of you who are concerned about a tight shot pattern, this shotshell will probably give you the best patterning results in number 1 buck. This load may not be a good choice for those who are recoil sensitive.

While #1 buck might be ideal IF the the shot is hardened, the reality is that these loads might be hard to find. If finding hardened #1 proves elusive, 00 buck is a great choice instead.

Quoted:
Thanks OP learn something new everyday.

Can you tell me how to calculate the cross section?  I would like to compare some of the bigger payload buckshot rounds.

Considering over penetration is not a issue would a full 12 or 15 pellet load of 00 (or 8-10 of 000) be better???

ETA

He mentions hardened as if some loads are not. Are they listed as such?