Member chucky2 sent a full box of these to put them to the tests!! Thanks for sending these 8)
I will chronograph 2-3 in 4.75" and 6" barrels, send one to The Shadow for a pull-down and send however many Chopinbloc wants for gel/armor/meat/etc... testing he wants. Should be interesting!
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Looking forward to the testing. 1700 FPS! :o
Cool looking to see the numbers!
Looking forward to it.
I will definitely be following this one! Is anyone set-up to test stability at moderate (75-100 yard) ranges? I always wonder about that with light for caliber projectiles.
Heading out this morning for a long overdue Shootfest to run these and some others.
Thanks for testing these out for us All! Man had I known you were going to share the Post-It I'd have written a little neater! :D Bah, who am I kidding...that's about as neat as this computer geek can write haha...
Nothing beats my mess! :o
In the past Kevin put out some actual results in pistols they test with. I didn't see anything for these on his site ???
If they are based off the Glock 4.6" barrel, they fall short.
EAA Limited Pro 4.75" barrel 1607, 1651, 1660. Average 1639.33 FPS/ 685 LBS
EAA Super Match 6" barrel 1686, 1714, 1716. Average 1705.4 FPS/ 743 LBS
I think I will pass the results by Kevin if he's reachable.
Don't forget t he solid copper bullets are longer, and he may not be able to stuff as much powder in those cases.
I shot some of into a ballistic material we had laying around. These did not penetrate (neither did a .223), but they felt every bit of full power 10mm ammo in my Glock.
True! It will be interesting to see if the pull-down shows Lovex and if it's a compressed loading.
The info I got from somewhere showed Silhouette.
Looking forward to it. Thanks for the chrono information!
The last one was loaded with Silhouette|
http://10mm-firearms.com/factory-10mm-ammo-pull-downs/underwood-115gr-lehigh-defense-xtreme-penetrator-12092015/msg51673/#msg51673 (http://10mm-firearms.com/factory-10mm-ammo-pull-downs/underwood-115gr-lehigh-defense-xtreme-penetrator-12092015/msg51673/#msg51673)
That one wasn't compressed was it?
It was probably close or touching the base of the bullet...nothing like that Power Pistol loading from Buffalo Bore! ::)
Underwoods rep though is that they meet what's on the box (and in many cases exceed it). If these are hitting those speeds then IMHO, they shouldn't say 1700 on the box. If the 4.75 average is 1640 then 1650 would be a more appropriate number.
Quote from: chucky2 on November 18 2016 08:55:03 AM MST
Underwoods rep though is that they meet what's on the box (and in many cases exceed it). If these are hitting those speeds then IMHO, they shouldn't say 1700 on the box. If the 4.75 average is 1640 then 1650 would be a more appropriate number.
Maybe Underwood's test gun for these was a 6 inch barrel.
I think that would be a departure from what they normally use to dictate their box speeds. Memory serves it was either a Glock 20 (4.6" barrel in those) or a 5" 1911-type they used. If they're basing their numbers off 6" barrel now then that is something new I believe.
50 fps at these speeds in only a 3% variance. That could be barrel to barrel difference.
I haven't paid that close attention, but my perception was that out of the 4.75" barrel he always uses for testing, doesnt the average for the Underwood rounds tested always hit advertised velocity? If not it's not a massive deal, I just sorta always got used to seeing people Chrono and get advertised velocity.
I just asked Underwood about what barrel is used, on November 21st. Here was their reply.
Quote from: UnderwoodWe're basing our 10mm velocities off of a 5" barrel, you should expect a loss of about 50fps using a 4.6" barrel.
For 40SW, we are using a 4.6" barrel for velocities.
From a G29 you should expect about 1100-1125fps using the heavy 200gr bullets!
Their estimate was close, Harrygunner got an average of 1143 with their 200 XTP.
And now we know! Thanks Tic-Glock!
Huh? So now they base testing on 1911 length? It was G20 4.6" forever.
I thought it was a G20 also. Because in that video on YouTube, he got better than their advertised velocities with a G20. I'm going to reply to the email and ask them if they have always used a 5" and from what distance.
Edit: Email sent.
I wonder if that is across the board as well? That troubles me, because it reminds me of Doubletap.
Here is the report back guys.
Quote from: UnderwoodWe used to use a G20 with the 4.6" stock barrel for velocity reporting, but early 2015 we switched to using a 5" in a different platform for a multitude of reasons.
We also switched in late 2015 to a Digital Doppler Chronograph, so we aren't very far from that when we shoot, those are set up to shoot with the muzzle nearly parallel to the machine, but I don't think it actually starts tracking the projectile until it is about 10 or 15 feet in front of the machine. We used to set our old chrony up about 10 feet away, and surprising enough both machines will read within 3-5fps of each other on average when we're parallel to one and shooting over the other from 10 feet, though the digital one is far more consistent and far less sensitive to weather and lighting conditions.