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Old 09-06-2014, 00:34   #1
Glock19Fan
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Underwood 9mm Gold Dot

I was doing a gelatin test on some other calibers and decided to do a quick test of some of the 9mm Underwood 115 grain +P+ Gold Dots that I recieved a couple months back. I didnt get a picture of the block because it would have been too confusing and it was hard to take but here is the recovered bullet.

Handgun was a Hi Point C9, calibration depth was 3.25 inches. Penetration depth was just under 10 inches and the temporary and permanant cavities were exceptional. I fired the same round through my Glock 19 and got almost 15 inches but some of the petals had over expanded and folded near the base.

From what I have seen, this round is getting 1425-1475 FPS from a Glock 19, and was likely pushing at least 1350 FPS from the Hi Points 3.5 inch barrel.

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Old 09-06-2014, 00:37   #2
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It expanded good but the penetration is not too good, thanks for sharing the info.
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Old 09-06-2014, 00:42   #3
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It expanded good but the penetration is not too good, thanks for sharing the info.
I agree. While I tend to prefer deeper penetrating rounds, I think this would still be a great choice for pocket pistols (if they are rated for +P+) and for winter carry. However, I still wouldnt feel bad keeping this for normal carry although I think I will stick with Speers 124 grain +P Gold Dot for now until I can do more testing.

Another round I tested was Underwoods 115 grain +P+ Nosler JHP, which from both my Glock 19 and Hi Point penetrated between 12-15 inches. Both times the bullet exploded into fragments, but the base of the bullet managed to penetrate to a sufficient depth. I dont ususally like fragmentation with handgun rounds but in this case most fragments penetrated at least .75+ unlike most handguns that simply leave the fragments laying in the track.
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Old 09-06-2014, 00:52   #4
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Originally Posted by Glock19Fan View Post
I think I will stick with Speers 124 grain +P Gold Dot for now until I can do more testing.
Same here, in 9mm I stick with the Gold Dot 124+p and 147s depending on if it is a short barrel or 4 in barrel, with the one`s that are 4 inch barrels I go with the 147s and anything shorter than 4 in I go with the 124+p.
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Old 09-06-2014, 06:04   #5
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Glock19fan,

Thanks for the Range & test report. Although I am not a real huge fan of the +P+ type or rounds, I do like the result of the Underwood 115g.

In a perfect world, using Hollow Point ammo, having great expansion & Penetration would of course be the best... but this in not a perfect world. If I had to choose I would take proper expansion over penetration.

I like the way the 115g bullet expanded for you out of your High Point, makes for a pretty good round.

Thanks again
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Old 09-06-2014, 21:38   #6
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Glock19fan,

Thanks for the Range & test report. Although I am not a real huge fan of the +P+ type or rounds, I do like the result of the Underwood 115g.

In a perfect world, using Hollow Point ammo, having great expansion & Penetration would of course be the best... but this in not a perfect world. If I had to choose I would take proper expansion over penetration.

I like the way the 115g bullet expanded for you out of your High Point, makes for a pretty good round.

Thanks again
I tend to be a mid weight +P guy myself but I think the best selling point for this ammo is for short barreled weapons and extreme cold temperatures. I would be willing to be this load would cut through barriers like butter too. I was impressed to see 15 inches of penetration out of my 19 but I think I should do some more testing before I think about switching. Judging from other tests I have seen, denim/clothing would cause the penetration to suffer from my 19 so I may just keep it for pocket sized 9mms.
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Old 09-08-2014, 00:28   #7
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Tell you what...

This 9mm Underwood load achieves Hornady 147 gr. 357 SIG specs for MV and ME.

Except it's loaded w/ the Gold Dot instead of the XTP bullet.


Underwood also loads this bullet in a 357 SIG cartridge at an even greater velocity.

My choice for an SD round... Yikes!




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Old 09-08-2014, 22:06   #8
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For decades it has come down to light and fast or heavy and slow but while some companies have come along to help fill that gap, I believe Underwood has done the best job of not only filling that gap but offering it at a competitive price, normally cheaper than the original manufacturers themselves..

I look forward to getting some of those 147 grainers as well. In my testing with the standard load, I got minimal penetration but great expansion.
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Old 09-15-2014, 17:27   #9
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The deep hollow cavity Gold Dots don't respond well to hot rodding;

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This Gold Dot had a MV of 1155 fps out of a G17.
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Old 09-15-2014, 17:52   #10
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By comparison to the deep hollow cavity 147 GD above, the shallow hollow cavity is designed for fast velocities;

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A bullet is only as good as its weakest pedal, this is what a JHP should look like with all pedals folding back evenly. ....as the Speer designers/R&D constructed it.

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125gr Gold Dot @1436fps, 0.532" expansion, ~16" penetration. ...M911 in 38 Super.

FWIW, I no longer inventory 124gr GDs for handloading, 125gr Gold Dots perform better. ....1280fps from a G17.
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Old 09-15-2014, 18:39   #11
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Quote:
Originally Posted by Glolt20-91 View Post
FWIW, I no longer inventory 124gr GDs for handloading, 125gr Gold Dots perform better ....
That's my understanding of the issue. You match the bullet design to the velocity window and avoid mismatched components.
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Old 09-16-2014, 01:05   #12
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That 147 grainer did experience separation but that expanded diameter looks to be well over an inch. Not something I would carry but I wouldnt mind seeing further testing. What was the penetration depth of that bullet?

FWIW, I havent seen any signs of separation in the 115 grain +P+ load, just slight over expansion. However, I have noticed the reason that heavier bullets with medium expansion deliver near equal damage to high velocity, large expanded bullets is partially because they travel nose forward the entire depth, where as I have noticed 115 and 124 grain (and its equivalents in other calibers) tend to reach maximum diameter and turn sideways like a frisbee traveling through tissue/medium.

I would like to see a 147 grain Gold Dot designed around a 1100-1200 FPS window if there isnt one already for the .357SIG or other 9mm variations.
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Old 09-16-2014, 09:32   #13
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Nothing new with the ultra-hot Underwood loads. Expansion is phenomenal. Penetration is abysmal. No thanks.

Last edited by WinterWizard; 09-16-2014 at 09:33..
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Old 09-16-2014, 16:23   #14
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Quote:
Originally Posted by Glock19Fan View Post
I would like to see a 147 grain Gold Dot designed around a 1100-1200 FPS window if there isnt one already for the .357SIG or other 9mm variations.
Hornady offers a 124-grain XTP in .357sig that the box claims travels at 1225 fps. Underwood and other boutique ammo makers probably offer one as well but as stated I will stick with the Big Name ammo makers. I'm fairly sure the boutique ammos have 147-grain rounds for 9mm that hit the fps you specify.

I really wish Federal, Remington, Speer and Winchester would begin offering 135 - 165 bullet weights in .357sig.
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Old 09-16-2014, 21:38   #15
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Hornady offers a 124-grain XTP in .357sig that the box claims travels at 1225 fps. Underwood and other boutique ammo makers probably offer one as well but as stated I will stick with the Big Name ammo makers. I'm fairly sure the boutique ammos have 147-grain rounds for 9mm that hit the fps you specify.

I really wish Federal, Remington, Speer and Winchester would begin offering 135 - 165 bullet weights in .357sig.
What I meant was that I would like it if Speer designed a 147 grain bullet to perform around 1100-1200 FPS rather than the 800-1000 FPS or so that it is currently designed around. That way you could still have the high energy loads but achieve 12-14 inches of expansion with normal .60-.70 expansion.

The 115 and 124 grain bullets seem to hold together well but I would also like to see some tweaks in their design for use in carbines and high velocity loads.
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Old 09-17-2014, 11:30   #16
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That way you could still have the high energy loads but achieve 12-14 inches of expansion with normal .60-.70 expansion.
Isn't that what just about every premium 124gr +P hollow point is achieving already? If that is what you want, there are several loads already out that that achieve this.
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Old 09-22-2014, 23:22   #17
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Isn't that what just about every premium 124gr +P hollow point is achieving already? If that is what you want, there are several loads already out that that achieve this.
Yes but the extra energy allows for larger temporary and permanant cavities, better penetration through barriers, as well as better function in some pistols.
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