Monday, April 28, 2014

DoubleTap Tactical 10mm Auto 125 Grain Barnes TAC-XP Multi Shot Terminal Test

10mm Auto has intrigued me for quite some time.  Folks that love it, loaded to its full power potential, make it sound like it is handcrafted by Artemis herself and capable of slaying the orneriest Tyrannosaurus with a single well placed shot.  With such a reputation, it was only a matter of time before curiosity got the better of me and I decided to take the plunge and buy the parts required to convert my Glock 21 to work with the 10mm cartridge.

I've slowly come to the realization that Barnes TAC-XP bullets consistently test well for me in all calibers.  For my freshman outing with 10mm, I decided to start with something that I was confident would perform as expected.  The DoubleTap Tactical 10mm load features the Barnes TAC-XP bullet in the lighter 125 grain weight.  Other ammunition makers choose the 155 grain version of the TAC-XP bullet for their 10mm loads.     

You may notice a change in my testing protocol that I've introduced with this test.  Instead of running a 5 shot velocity string before terminal testing, the actual test shots will now be part of the 5 round velocity average.  

Test Pistol:

Test Protocol:
Step 1)  Measure and record temperature and relative humidity.
Step 2)  Run 2 shots over a ProChrono Digital Chronograph at a distance of 10 feet for baseline velocity and point of impact.
Step 3)  Run various terminal test shots, with and without simulated clothing barriers, into a block of Clear Ballistics Gel that is calibrated to 10% Ordnance Gel density.  Shot distance is 10 feet.
Step 4)  Run a ~600 fps calibration test bb shot into the Clear Ballistics gel block and record penetration depth to verify density.

Test Results:

Video Documentation of the Entire Test from Range to Bullet Recovery:

My Thoughts on This Load:
Being new to 10mm, I really wasn't sure what to expect from this light-weight 10mm offering.  While it would have been nice to see this load meet published velocity expectations, it still performed well in testing.  All test shots expanded fully and penetrated to the desired depth of 12 to 18 inches after clearing the barrier materials.

Pick or Pan:
As mentioned above, this was my first opportunity to perform terminal testing with 10mm Auto ammunition.  Without a base of other examples to use for comparison purposes, I would call this load a pick based on expansion performance and penetration depth when fired from a 4.6" barrel. 

Disclaimer....This test should not be considered an endorsement or recommendation for the product(s) tested.  All tests represent actual performance in ballistics testing media.  Terminal performance in all other media will show different results.  It is up to each individual to make their own personal decision on which specific ammunition to use for their needs.  It's also critically important to test any ammo in YOUR SPECIFIC FIREARM before relying on it for any purpose.

Ammunition labeled as +P or +P+ should only be used in firearms that have been certified by the manufacturer as safe for the additional pressures generated by these ammunition types.


  1. Thank you so much for starting on the 10mm tests. If you could test the trophy bonded federal load and the 155gr buffalo bore barnes load I will be ecstatic. Along with the usual suspects underwood 180 and 200gr xtp and 200gr underwood nosler!!

  2. Yep, that would work.

    Not a 10mm aficionado here (recoil wuss), but the results speak for themselves.

  3. Nice test as usual. I don't buy doubletap ammo for two reasons. They consistently misstate their velocities on average by 200 fps, I find that very dishonest. Secondly, they are way overpriced. My recommendation is Underwood Ammo. They often understate their velocity and are more reasonably priced. Plus they are loaded to true 10mm power and high velocity. Thanks again for a great test.

    1. Glad you liked the test. I wish Underwood made a TAC-XP load in 10mm. I would try it. I tested his 380 TAC-XP recently and it did pretty well.

  4. I would like to see a test of the Double Tap 10mm 200 gr Hardcast WFNGC