Interesting the spring-back effect. That seems to never be taken into account when measuring penetration.

His high speed camera work is nothing short of incredible to watch. 

Results in this particular experiment appeared to indicate some approximation in couple of the faster moving projectiles and really no comparison at the slower speeds. 

Certainly validates & supports many of Raggedyman's test results as compared to same bullet test by others using clear ballistics.

     I'm just wondering if a test should be performed to approximate the spring-back effect into the penetration numbers. If a good formula could be developed, the real world results would make more sense.

Nice. Thank you for posting, Intercooler. I don't know how I missed that one, I'm subscribed to Brassfetcher.

It does seem to confirm my suspicion but ironically it seems to disprove my belief that the discrepancy between Clearballistics gel and 10% gelatin increases with velocity. There is definitely enough of a discrepancy to disregard testing with Clearballistics gel for anything but a very rough idea of the ability of the projectile to expand. Maybe we can talk him into testing .357 mag, 10mm, .223, etc. to see whether my suspicion about velocity is totally false. 

On the bright side, if we can see a large enough comparative data set from professionals like this, we might be able to develop a scale that could be used to interpret Clearballistics gel results. Something like the McPherson chart, maybe.