>>Very interesting. Thanks for the report.<<
---------------------------------------
You're most welcome.
Self defense ammo has been mystified, hyped and marketed....all with a proprietary angle meant to convince the ill informed that 'their bullet' is the magic bullet, the best.
I just had to see my own real world-empirical evidence.....ergo; my own tests.
As you already know, Tom Burczynski is the designer of the HydraShok, Starfire and Quik-Shok.
He is also the designer of the Federal EFMJ.
Below is critical information written by Tom Burczynski. It's a long read, but well worth it:
"The Expanding Full Metal Jacket (EFMJ) is unique in that it utilizes a gilding metal jacket having 6 deep scores on the ogive’s interior which contains a pressure-conformed “core†of 50 durometer silicone bearing atop a pure lead hollow-pointed core. The jacket is heeled over at the base in the final stage of manufacture. There is no external hollow point present. EFMJ’s look innocuous and feed just like a typical FMJ bullet. Upon impact, the ogive collapses axially and expands radially as the scored areas split and the silicone compresses.
The nice thing about the design is that you can make it expand larger or penetrate deeper by regulating several variables; jacket wall thickness, radial score depth, the amount of silicone in the nose and the cavity size/angle of the hollow-pointed core. Note: the lead core doesn’t require any hollow point at all to perform well but its presence relieves some of the shock the jacket is subjected to when impacting hard barriers. Depending on caliber, velocity, and application, expanded bullet diameters range from .550 to .900. Expanded bullets recovered from heavily-clothed gel are monotonously clone-like.
The main advantage is that it doesn’t require the presence of external fluid to expand rapidly since it contains its own fluid-like substance (silicone). I’m most impressed with its ability to penetrate HEAVY clothing -- not 4 layers of denim -- 10 layers, and still provide impressive expansion.
While massive bullet expansions _can_ be obtained if EFMJ’s are driven to high velocities, as loaded, *penetration in each caliber is over 12 inches after piercing hard barriers.
*10% gelatin/FBI protocol
As far as rapidity of expansion is concerned, when a .45 Auto EFMJ is fired through ¾-inch *plywood, the exit hole created is 2 inches in diameter as compared to the half-inch hole formed by a high-velocity Gold Dot.
SOFT TARGETS: When the EFMJ strikes a soft target at an angle, the expansion (when looking directly at the nose) is still very round but is sometimes canted in relation to the shank’s axis. A big NY white-tail was hit behind the shoulder at an angle of about 30 degrees (155 grain .40 (S&W 4006)) and still looked good, considering the fact that it broke a rib. The general shape of the expanded bullet was surprisingly round. Weight retention was 100%. The deer traveled about 20 yards before piling up. I hope to have many more field reports on white-tails next year.
HARD TARGETS: Regarding hard targets, it depends on the target. If the bullet strikes plywood it digs in and expands, but as is the case with a soft point or hollow point, if the angle of impact is great enough, it will depart at the approximate angle of incidence. If fired at an angle into a masonry surface, the bullet is transformed into a large, ellipsoidal projectile, and because of the friction involved, a good percentage of its velocity is lost. The combination of reduced velocity and _very poor_ ballistic coefficient at least reduces the hazard to bystanders. One can only expect one design to perform so many tasks. There are no magic bullets.
Regarding barrier penetration, as stated previously; â€â€¦as loaded, *penetration in each caliber is over 12 inches after piercing hard barriers.†No bullet expands to full diameter instantaneously, that’s why (just like a JHP) it can penetrate car doors and windshields.
*10% gelatin/FBI protocol
Because it IS a _more_ rapidly expanding bullet and because 12 sharp jacket edges are exposed quickly, it shouldn’t experience cranial deflection/penetration problems."
____________________
Register
Login
FAQ
when it comes to custom guns).
but here's what I go with daily.
and seeing the work pictured here just kills me.