357 Magnum vs 10MM In Clear Ballistics Gel

[mr.revolverguy]

Middle Weight Terminal Ballistics Match
This video happens to be the longest video I have ever produced, apologies up front for that. Though I believe there is some worth while loading footage with the Lee Classic Turret Press in loading both calibers in the very beginning of this video. If you are void of patience you can skip to half way of this video and get to the footage you most likely came here wanting to see.

Place Your Bets
If you were a betting person who would you place your bet on. Let me know in the comments below, before you watch the video. Let's see how many get it right.

Twins
For you revolver fanatics and for those that asked for a revolver comparison of 357 Magnum and 10MM, well you got it.

S&W 686 7Shot Unfluted Cylinder, 7inch Barrel

S&W 610 Classic 6Shot Unfluted Cylinder, 6inch Barrel

Surprise Ending
Watching it all the way through most of you will be interested in the additional comparison I added in. Nope I am not telling — you have to watch.

https://www.youtube.com/watch?v=nz1OqnbnT4k&t=1703s

[blaster]

interesting. thanks.

[The_Shadow]

I'll place my bet for 10mm before watching the video...however 10mm 6" vs 357 7" is sort of unfair... but going look to see...

Well after watching the video the smaller diameter 357 showed deeper penetration over the larger 10mm...However the Hornady 180gr. XTP 357 is likely geared more toward a tougher hunting projectile as compared to the 180gr 10mm XTP as more of a self defense performance projectile.

Another great video there Mr. Revolver Guy!

[blaster]

one thing I noticed when comparing the carbine v.s. handgun with the same load, the higher velocities from the carbines = quicker & more expansion = less penetration than from the handguns.  having done some tests of my own in the past,( hard targets not gel) the .357  always won the penetration test even against the .44 mag.

[The_Shadow]

One of the most important things we can take away for these great test as a side by side comparison, is the projectile performance envelope as these bullets are reacting in the gel blocks.
We are seeing how higher velocity is causing earlier expansion with slightly less penetration.  Each bullet design has a velocity window of its design for optimum performance.
Mr. Revolver Guys testing clearly shows this quite well.  The 357 XTP 180 grain bullet with dual cannelures may serve a dual purpose as a hunting bullet that could be used from pistols and rifles chambered for caliber of different 35 caliber cartridges, whereas the 10mm/40 caliber bullet is designed for pistol mostly chamberings like the 40S&W shorter barreled performance.

[38-40]

I think test like these show sectional density effect on penetration meaning the same weight 357 bullet has a higher SD than a same weight 10mm. However penetration is effected by many factors.


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[sqlbullet]

I think test like these show sectional density effect on penetration meaning the same weight 357 bullet has a higher SD than a same weight 10mm. However penetration is effected by many factors.


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This.

I would love to see some velocity and SD normalized tests in penetration gel.  Seems to me the physics says comparable bullets (design, SD) at comparable velocities should have comparable penetration.  The wild card here is that as bullets get lighter, energy goes down at the square and energy is what deforms the hollow point.

[38-40]

I think test like these show sectional density effect on penetration meaning the same weight 357 bullet has a higher SD than a same weight 10mm. However penetration is effected by many factors.


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This.

I would love to see some velocity and SD normalized tests in penetration gel.  Seems to me the physics says comparable bullets (design, SD) at comparable velocities should have comparable penetration.  The wild card here is that as bullets get lighter, energy goes down at the square and energy is what deforms the hollow point.

Agreed. For SD to be the same in a .357 bullet and a .40 bullet the .40 would have to weigh more. The heavier the bullet the slower it can be driven in a given caliber ie 125g vs 165g. 357 mag. SD boils down to frontal area of the bullets resistance against the medium it's passing through thus it changes as bullets expand. Also as you said how much energy is used to expand the bullet and what effect that has on penetration .SD = weight / diameter squared.







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