Tracking Free Recoil And Recoil Mitigation To Test For Effects on Velocity

Firearms have been a source of entertainment, providing food and self-defense since their invention. They’ve also provided an avenue of hands-on exploration of science and engineering. Being able to understand the physics and mechanics of what’s taking place while shooting can help us be more consistent and efficient to be able to place rounds on our intended target.

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G20SF vs G29SF: How Much Difference Does Barrel Length Make?

We put the 10mm Glock models 29 and 20 against each other head to head to compare velocity from the two barrels in this video and we also fired 10mm Underwood 220 grain hard cast and 10mm Lehigh 140 grain Extreme Penetrator into a long row of ballistic gel blocks to find out which is the king of penetration.

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Which Best Millimeter Glock Is Best? Glock 20SF vs. Glock 29SF With MASSIVE Gel Test!

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I Screwed Up: Speer 10mm 200gr Gold Dot Gel Test And Retraction

I screwed up. I reported inaccurate velocities for this load. This video corrects the error and we cover the gel performance. We shoot Speer 10mm 200gr Gold Dot ammunition from an EAA Witness with a 4.5″ barrel into Clearballistics ballistic gel to measure velocity, penetration, expansion/fragmentation, and retained weight.

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BIG Freakin' Cartridge Test, DISCUSSION 02: What's Next?

The Big Freakin’ Cartridge Test’s first batch of 6 rounds is through, but there’s more to come. In the last post, we reflected on the test methodology, and some possible solutions. In this post, we’ll talk about what you can expect in the future.

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BIG Freakin' Cartridge Test, DISCUSSION 01: What Happened?

We’ve seen how the 6 different .223 Remington and 5.56mm loads have fared in the Big Freakin’ Cartridge Test, but we still have more to talk about. Specifically, we need to discuss what I did wrong (or what I am not satisfied with), and what I plan to do next. This post will concern the former, and a second installment will cover the latter.

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BIG Freakin' Cartridge Test 012: RUAG SS109 (M855 Equivalent) 5.56mm NATO, 16 and 20 Barrels

Next up for  the Big Freakin’ Cartridge Test is RUAG Ammotec’s version of the NATO-standard SS109 round (equivalent to US M855). I believe the ammunition I tested may have been made in RUAG’s facility in Thun, Switzerland, although I have not confirmed that.

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BIG Freakin' Cartridge Test 011: RUAG SS109 (M855 Equivalent) 5.56mm NATO, 14.5 Barrel, and Accuracy

Next up for  the Big Freakin’ Cartridge Test is RUAG Ammotec’s version of the NATO-standard SS109 round (equivalent to US M855). I believe the ammunition I tested may have been made in RUAG’s facility in Thun, Switzerland, although I have not confirmed that. The test procedure was as follows:

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BIG Freakin' Cartridge Test 010: Mk. 318 Mod. 0 62gr SOST (T556TNB1), 16 and 20 Barrels

Next up for  the Big Freakin’ Cartridge Test is Federal’s T556TNB1 load, which is the civilian market name for the Mk.318 SOST projectile developed by US SOCOM as a “barrier blind” round for the M4 Carbine and Mk. 18 CQB upper receiver. This ammunition uses a reverse drawn jacket to improve accuracy, and couples a fragmenting front end with a solid gilding metal base that improves penetration through tough barriers. I love this ammunition and use it religiously for home defense.  Continuing on from the last installment, we are now looking at the velocity test results for the 20″ barrel (more on the 16″ later).

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BIG Freakin' Cartridge Test 009: Mk. 318 Mod. 0 62gr SOST (T556TNB1), 14.5 Barrel, and Accuracy

Next up for  the Big Freakin’ Cartridge Test is Federal’s T556TNB1 load, which is the civilian market name for the Mk.318 SOST projectile developed by US SOCOM as a “barrier blind” round for the M4 Carbine and Mk. 18 CQB upper receiver. This ammunition uses a reverse drawn jacket to improve accuracy, and couples a fragmenting front end with a solid gilding metal base that improves penetration through tough barriers. I love this ammunition, and use it religiously for home defense. The test procedure was as follows:

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BIG Freakin' Cartridge Test 008: PMC M855 5.56x45mm 62gr LAP, 16 and 20 Barrels

Next up for  the Big Freakin’ Cartridge Test is Korean manufacturer PMC’s clone of M855, called X-TAC M855 LAP. This ammunition features very uniform-looking external dimensions, attractively finished brass cases and projectile jackets, and a reasonable price. I formerly used M855 as a stockpiling round, although I have since switched to other rounds like Federal’s T556TNB1.

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BIG Freakin' Cartridge Test 007: PMC M855 5.56x45mm 62gr LAP, 14.5 Barrel, and Accuracy

Next up for  the Big Freakin’ Cartridge Test is Korean manufacturer PMC’s clone of M855, called X-TAC M855 LAP. This ammunition features very uniform-looking external dimensions, attractively finished brass cases and projectile jackets, and a reasonable price. I formerly used M855 as a stockpiling round, although I have since switched to other rounds like Federal’s T556TNB1. The test procedure was as follows:

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BIG Freakin' Cartridge Test 006: PMC XP193 5.56x45mm 55gr FMJ, 16 and 20 Barrels

Next up for  the Big Freakin’ Cartridge Test is Korean manufacturer PMC’s clone of M193 Ball, called XP193. This ammunition features very uniform-looking external dimensions, attractively finished brass cases and projectile jackets, and a reasonable price. Interestingly, XP193 appears to use a lower drag 55gr bullet, possibly based on the Sierra 55gr, instead of the somewhat draggier Remington-style projectiles used by Federal, IMI, and others for their M193 clones. I like to use XP193 when I need full-power ammunition without spending too much.  Continuing on from the last installment, we are now looking at the velocity test results for the 20″ barrel (more on the 16″ later).

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BIG Freakin' Cartridge Test 005: PMC XP193 5.56x45mm 55gr FMJ, 14.5 Barrel, and Accuracy

Next up for  the Big Freakin’ Cartridge Test is Korean manufacturer PMC’s clone of M193 Ball, called XP193. This ammunition features very uniform-looking external dimensions, attractively finished brass cases and projectile jackets, and a reasonable price. Interestingly, XP193 appears to use a lower drag 55gr bullet, possibly based on the Sierra 55gr, instead of the somewhat draggier Remington-style projectiles used by Federal, IMI, and others for their M193 clones. I like to use XP193 when I need full-power ammunition without spending too much. The test procedure was as follows:

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BIG Freakin' Cartridge Test 004: Vympel .223 Remington Golden Tiger 55gr FMJ, 20 Barrel

Next up for  the Big Freakin’ Cartridge Test is Vympel’s budget 55gr FMJ load in .223 Remington, made in Amursk, Russia. This ammunition features a lacquered steel case, bimetal jacketed 55gr FMJ bullet and purple neck sealant. This is one of my favorite practice rounds due to its environmental toughness.  Continuing on from the last installment, we are now looking at the velocity test results for the 20″ barrel (more on the 16″ later). The test procedure was as follows:

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