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Old September 25, 2012, 10:55 PM   #1
g20gunny
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Tough 10mm auto expanding bullet?

I was wondering if any of you have found a 40 caliber bullet worthy of the 10mm autos potential such as a semi jacketed soft point in a magnum revolver. I am having trouble keeping hollow points together. I have tried gold dots, xtp, nosler and buffalo boars gold bullet and all have had serious jacket seperation issues at full 10mm velocities (180gr above 1300). I even had the 180gr nosler come apart in thin skined game at 200 yards (I did recover the bullet so it did the job but don't ask). I will say that all have proven more than lethal but I havent tried them on tougher game like pigs over 200 lbs or larger whitetails. If they make expanding hunting bullets for the 357 mag than theres no reason not to make them for 10mm auto. I know that theres the 200-230 grain hard cast gas checks from multiple bullet makers but nothing expanding in a soft point. I do reload and have considered resizing 41 magnum bullets which would be a little too tough but still expand more than say a hard cast swc. I am interested to hear from those of you who have actually used the 10mm for hunting or woods backup.

Thank you.
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Old September 26, 2012, 07:47 AM   #2
coop2564
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I use Corbon 180gr SP
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Old September 26, 2012, 01:16 PM   #3
K1500
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WW 175gr STHP is an old bullet but is designed for 10mm velocity.
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Old September 26, 2012, 01:35 PM   #4
mete
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Check carefully to see if the bullets are designed for defence or hunting !!
Hunting bullets are for deeper penetration than the defence types.
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Old September 26, 2012, 09:18 PM   #5
g20gunny
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Thank you coop, that is exactly what I am looking for, a 180 gr bonded soft point at 1320fps/700lbs energy. Have you done any gelatin tests or penetration tests on pigs or deer? I have shot corbon before but only their 135gr frag-nasty. Does anyone have any idea what bullet corbon uses as I shoot mostly reloads. I do buy the 175gr win silvertips and get descent results but still not the deep penetration I'd like to see.
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Old September 28, 2012, 11:30 PM   #6
Mello2u
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Have you tried Hornady 10mm 180 gr HP/XTP?

They claim:
* Controlled expansion to 1.5x its original diameter over a wide range of velocities.
* Heavier jacket stands up to the high pressures and velocities of the highest performance handgun cartridges.
* Controlled expansion with deep penetration.
* Recommended muzzle velocity range: 700 to 1500 fps

I have read accounts about the performance showing deep penetration and retention of bullet weight at the upper end of velocities for the various cartridges about which the articles or posts were written. I have no actual results on game animals to offer.

I know Doubletap used to load a 10mm Auto round with a 200 gr XTP bullet. They claimed a muzzle velocity of 1250 fps.
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Old September 29, 2012, 02:07 AM   #7
bamaranger
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200's

I inclined to believe (no proof) that the vast bulk of .40/180's are intended for the .40 S&W and thus designed to expand in the 800-900 fps range.

Drive those same slugs to good 10mm velocities, 1200 fps or so, and I;m not surprised they get fragged.

I'm thinking though that .40/200's are likely intended solely for the 10mm. If that's true, they should hold together better.
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Old September 30, 2012, 08:49 AM   #8
testuser
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Here's the Hornady online catalog...check out page 21. It lists velocity ranges for XTP bullets.

The chart isn't exact and cuts off at 800 fps, but does give a generally range. Looks like:

155 gr XTP - 900 to 1300 fps
180 gr XTP - 800 to 1500 fps
200 gr XTP - 800 to 1200 fps

Maybe a little more, maybe a little less, hard to say based on the chart. Looks like Hornady designed their XTP line to expand over a wide range of velocities, but if you're really pushing the 10mm really hard you might be at the top of the range.

http://pubs.ez-flip.com/horn-pl2012/start.asp

Last edited by testuser; September 30, 2012 at 08:56 AM.
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Old October 1, 2012, 08:01 PM   #9
WESHOOT2
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making the long hole

I still have a fair stash of Hornady's 200g FMJ-FP.

AA9, CCI300, new sized cases only.....


Drive it to 1300fps minimum. At near 1400fps seems like it will never stop penetrating.
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Old October 1, 2012, 08:02 PM   #10
WESHOOT2
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expanding universe

Or just run their 200g XTP-HP fast......
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Old October 3, 2012, 12:06 PM   #11
RickB
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Quote:
I inclined to believe (no proof) that the vast bulk of .40/180's are intended for the .40 S&W and thus designed to expand in the 800-900 fps range.

Drive those same slugs to good 10mm velocities, 1200 fps or so, and I;m not surprised they get fragged.

I'm thinking though that .40/200's are likely intended solely for the 10mm. If that's true, they should hold together better.
I think this is a good line of thinking. I'd expect 200gr bullets to be intended for 10mm, but any new bullets in the 155-180 range would be suspect.
I think the Nosler 135 was introduced before the .40 S&W, but the former may have been redesigned over the last twenty years, too.
XTPs are, by design, deep penetrators, and I have suspected that they would, if driven at 10mm velocities, penetrate less and expand more. testuser's chart appears to show XTP's operating at velocities covering the .40-10mm range.
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