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Old 02-16-2006, 20:44   #79
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Join Date: Jul 2005
Location: Arizona Territory
Posts: 5,932
Late last year I experimented with 175gr Silvertips from a stock G20 and really wasn't impressed. My goal is to have as much of an energy dump/expansion with full penetration that won't go into the next county.

Just for fun I chronographed some 210gr Silvertips from a .44 mag and may have achieved that goal. In recovering 3 of the 4 rounds recovered; expansion measured between .96" to 1.106" which is very impressive from a .429 bullet. The fourth round expanded to .706" and spun off a shard of lead approximately .25" wide and 1.07" long. This was not from a full boogy load, chrono was over 1550fps which equates to about 1150ftlbs of energy.

180gr in .40 cal is relatively close in sectional density to 210grs in .429 cal.; 140grs in .357 and 230grs in .451 cal.

Using three different powders it was very easy to run 180gr Golden Sabers from a 6" KKM barrel from 1280fps (600ftlbs) to 1370fps (750ftlbs) and these bullets penetrated and expanded better than I was able to get several months ago from a stock G20 (combination sheet metal and/or sand and/or wood).

I expect 175gr Silvertips in 10mm to at least equal the 180gr GS bullet's velocity and leave a golf ball sized hole thru a BG and not penetrate the first layer of sheet rock in a room. This of course is supposition on my part, but the Silvertips are very explosive in their expansion, they tend to hold together and the velocity/energy from a 10mm should be enough to push a .90" bullet through a BG and expend itself upon hitting another barrier.

The Strasburg Papers give a different quantitative slant to what Fackler published; but they agree that .451 230gr FMJ is the smallest ball ammo that should be used for self defense and also the need for multiple shots on the bad guy.

"Never tell people how to do things. Tell them what to do and they will surprise you with their ingenuity."
- General George S. Patton, Jr

"Speed is fine, but accuracy is final - Bill Jordan
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