I know this thread has been dead for a couple of weeks, but I have done a bunch of 10mm bullet testing that I believe would interest most of you. I found this thread searching for 155gr Gold Dot expansion pictures, as I'm about to test it. I have tested almost every SD .400" bullet out there (I've got several left, and will keep going as long as I can find more new bullets to test). I used my Glock 29 for all of the testing, and every bullet was pushed as fast as possible without blowing up my gun. My goal was to see which bullets could handle 10mm velocities. I know the G20 would have been better for achieving huge velocities, but I wanted to see which bullets were the best for self defense, and the G29 is the more practical platform for SD use. Plus, it's all I had when I started. Besides, I pushed these bullets pretty hard. I got some good velocity for most out of the little 3.78" barrel.
The medium I used was wax. If you've ever seen The Bullet Test Tube, it's very similar, just homemade. It's about a 55/45 mixture of paraffin wax/Vaseline. The reason wax is good is because it captures not only penetration and the bullet, but also captures the wound cavity. Upon cross-section, it lets you view the actual wound profile. This cannot be done with other media. By examining professional gelatin penetration results from the same gun, and comparing them with my data, it seems penetration in gelatin is about 1.8 times greater. So, 10" of penetration in my wax tube would equate to roughly 18" in ballistic gelatin.
Anyway, here's a link to Glock Talk, where I've posted all the work/data. I hope it helps you guys decide on a good 10mm bullet. My name over there is 21Carrier.
http://glocktalk.com/forums/showthread.php?t=1340792
EDIT: By the way, if you just check it out quickly, it's best to skip ahead to the later pages. The first few tests were not as good, as I was perfecting my technique. Later tests were better. So, if the first few look like crap, skip ahead and check out the later tests.
Here are the bullet's I've tested (off the top of my head):
-125gr Barnes TAC-XP
-135gr Nosler JHP
-135gr Sierra JHP
-135gr Pow'RBall (reloaded to 1500fps, factory will be tested soon)
-150gr Nosler JHP
-155gr Silvertip (twice, with two different loads)
-155gr XTP
-156gr Lyman Cast Devastator HP
-165gr Golden Saber
-165gr Gold Dot
-175gr Silvertip (both factory and hot reloaded)
-180gr XTP
-180gr XTP (modified for greater expansion)
-180gr Gold Dot
-180gr PDX1 Bonded
-180gr Rainier Plated HP
-200gr Black Talon (reloaded hot)
-200gr XTP
-200gr XTP (modified for greater expansion)
-200gr Double Tap WFNGC (hand-loaded, not DT factory)
-And I'm sure I forgot about one or two. I still have a factory 135gr Pow'RBall to test, a 180gr Starfire, a 155gr Gold Dot, and I've worked the 125gr Barnes TAC-XP up to a much higher velocity, so I will retest it soon.
I recorded penetration, wound cavity diameter, retained mass, expansion, velocity, etc. for each bullet/load. Some of the above bullets are not available as components, so I pulled them from either 10mm or .40S&W ammo. Anyway, hope it helps.
Also, I rarely come to THR, and I had forgotten I had even registered here a while back. Not that it's not a great forum, it's just that I have lots of people I know at GlockTalk, so I usually spend time over there. If you have a question or a bullet test request, let me know. If I don't answer on here, it's just that I forgot to check back. If that happens, PM me at GT, and I'll respond.