10mm shoot out

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I had boxes of promotional folders for BBG ( backyard ballistic gelatin.) Very scientific conditions : roughly 20', overcast drizzle. Underwood hard cast bear spray 200g @ 1250fps vs Fiocchi 180g truncated cone @1250fps vs. Winchester white box ( Wally) generic 40 S&W 180 @ ?. So, determined to shoot only one high dollar Underwood it of course went low and fanned out the folders. I put another a little higher and it blew out the whole damn box! Forgot my back up box. Underwood #2 prepped and properly ready to receive definitive data. I missed! This is getting expensive..... Fourth one went perfectly but did not exit first box. How curious. Underwood #2 penetrated 147 folders but tore through another 18, which suggests the accordion nature rebounded the bullet. Fiocchi passed through 88 with a perfect mushroom while Wally went through 104. Surprise! Of course none of this proves anything but it was amusing.IMG_1592.jpgIMG_1591.JPG
 
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I'm assuming those velocity numbers were on the box and not via a chronograph?

It could kinda prove one thing, that often times commercial 10mm is nothing more than 40S&W in 10mm brass. "number of folders" isn't scientific, yet somehow the "40 beats 10" in 1/2 your test cases.
 
I picked up a handful of practice type 9mm once that tore up a log. Sort of an impromptu Lucky Gunner test. I'm thinking that's bound to hurt meat and bone just as well even if there's no pretty petals peeled back. Then there's that robber the cop shot 14 times with 3 or 4 to the head who shot him back a few times and lived to leak all over the trauma bay. The MV was on the boxes. Underwood shaved off and flattened but showed zero rifling grooves. Fiocchi retained 179.9 grains. My opinion that equal weights and velocity would render similar outcomes to the carefully conducted log penetration test proved unfounded, but reasonable assumption. The lesson seems to be - shoot accurately, shoot often, shoot a little faster at the same spot. There might be more to it however...
 
I had a Raven .25 back when I was young and fun. My grandfather told me it was junk and you could shoot a man with it and he would just laugh. My highly scientific test was a piece of 5/8 plywood. Standing at self defense distance it put the whole magazine through it. I decided then that you had to test for yourself. Now cycling was not that little pistols strong point but it never failed to shoot at least one time before it jammed🤣
 
I seen a 32 auto bounce off plywood one time, found out that wasn’t a carry/protection round for me...
 
Jayne said:
I'm assuming those velocity numbers were on the box and not via a chronograph?

It could kinda prove one thing, that often times commercial 10mm is nothing more than 40S&W in 10mm brass. "number of folders" isn't scientific, yet somehow the "40 beats 10" in 1/2 your test cases.
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I can assure you that the Underwood ammo performed exactly like the info on the box suggested, I’ve ran several boxes of Underwood over a Chrono and their numbers have always been spot on or high.
 
Jayne said:
I'm assuming those velocity numbers were on the box and not via a chronograph?

It could kinda prove one thing, that often times commercial 10mm is nothing more than 40S&W in 10mm brass. "number of folders" isn't scientific, yet somehow the "40 beats 10" in 1/2 your test cases.
Click to expand...
It was a dopey exercise, not precise at all. Collapsable folders cushion and absorb impact to a certain extent, resisting penetration the more with compression. Each box may not have had the same number of folders. The 40 was advertised at 1060 fps I noticed later. Logically it should not have outperformed the Fiocchi 10 at 1250. I wouldn't draw a whole lot of conclusions from any of it. But that white box 40 isn't too shabby for cheap fare, based on the one bullet fired...
 
Tarowah said:
I can assure you that the Underwood ammo performed exactly like the info on the box suggested, I’ve ran several boxes of Underwood over a Chrono and their numbers have always been spot on or high.
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Do you find them to be accurate? I haven't shot mine enough to know much about it and won't be wasting Underwood anymore. 10 is hot but I don't find it intimidating at all. The Rubbermaid Glock seems to soak up recoil pretty good. I kinda like the feel of power.
 
Relapse said:
Do you find them to be accurate? I haven't shot mine enough to know much about it and won't be wasting Underwood anymore. 10 is hot but I don't find it intimidating at all. The Rubbermaid Glock seems to soak up recoil pretty good. I kinda like the feel of power.
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I’m not exactly a “bullseye” shooter but at 15 yards or less I can normally shoot out the X ring on a B26 target with little trouble, at 20-25 yards the groups definitely start to open up by a substantial amount, but I’m also “that guy” and will attempt to shoot my G19 & G17 out to 100 - 200 yards to see if I can, yes it’s silly, but I enjoy the challenge.

The whole point of the word salad above is to demonstrate that I found shooting hot, jacketed Underwood 10mm ammo was just as accurate as the milder “off the shelf” 10mm ammo from 135 grain to 200 grain ammo and smaller calibers, such as .40 S&W & 9mm, don’t get me wrong, the Underwood 10mm offerings are “snappy” to say the least and you’ll have zero questions if it’s loaded to the cartridges safe limits, I was still able to shoot out the X ring on a B26 out to 15 yards, albeit at a much slower rate of fire, I also found that shooting out to 100 yards was easier due to the flatter shooting cartridge, I think I recall only hitting the 100 yard plate once out of 50 rounds with the G22 , 8-10 times with the G17 and at least 12-15 times with the Underwood 180 grain FMJ 10mm ammo.

We did run into horrible accuracy & feeding issues shooting the lead hard cast 180 grain offering, the bullet basically tumbled out of the muzzle, but then again we knew that shooting un coated lead projectiles out of a factory Glock barrel wasn’t exactly all that bright, the owner of the G40 told me he picked up a quality aftermarket barrel with standard rifling and the hard cast shot extremely well.

Hickok45 made a video shooting hard cast 10mm out of a G20 and he had a similar issue, once he switched to a LoneWolf 10mm barrel the hard cast also shot fine for him.

I found the video showing the hard cast lead bullet issues, I believe he also has a video up of him shooting jacketed Underwood 10mm ammo with great results.



 
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Great info. Thanks. I forgot Underwood makes all sorts of ammo. This was the hard cast 200 grain Bugga Bear loads. They deformed and lost mass worst of all, in the admittedly small sample. The one miss out of 4 I can't blame on Glock rifling. More like my multi tasking brain's sequencing issues.
 
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