The 6UM

[Ryan Avery]

Case measurements


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[Ryan Avery]

Another buck from Kurt. Shot it in the butt at ninety yards only shot he had in the timber. The bullet made it in to the lungs and didn’t take a step.










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[HingleMcCringleberry]

Another buck from Kurt. Shot it in the butt at ninety yards only shot he had in the timber. The bullet made it in to the lungs and didn’t take a step.

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Would love to hear an in depth discussion from him on the podcast about his observations with the smaller diameter bullets vs the big mags.

 

[rifletuner]

Another buck from Kurt. Shot it in the butt at ninety yards only shot he had in the timber. The bullet made it in to the lungs and didn’t take a step.

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Thats excellent penetration and you cant question the performance. I am assuming that since it penetrated so far, the bullet retained a lot of mass? And assuming its a DTAC, the great terminal performance and a lot of penetration means it tumbled rather than expanded? I guess thats what I am visualising from the description.

 

[RMM]

Case measurements


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Is ADG going to be producing 6PRC (6-6.5PRC) brass too? Did I miss this somehow?

 

[Holt stewart]

Unfortunately I was butchering alone in 20 degrees and 20-30mph winds that were driving all of the snow from the night before off the ground and into any bare skin I had so I didn’t get any autopsy pictures but the 108 ELDM at 2165fps had no problem destroying both lungs. I snuck between the ribs high lung and still found fragments of the jacket in the heart so there was plenty of damage. There was even a piece in the knuckle of the front leg when I went to break the legs off, guessing it traveled down the leg to get there. Shot was taken leaning back against the ground (it was steep enough the hard part was keeping from sliding down hill) with my pack standing up in my lap. Spotting impact was not a problem.
Bull took three steps falling forward and the end of the third step was on his face. Down in 5-10 seconds. Very happy with the 6um/rokstock/vesper combo.

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[wind gypsy]

Unfortunately I was butchering alone in 20 degrees and 20-30mph winds that were driving all of the snow from the night before off the ground and into any bare skin I had so I didn’t get any autopsy pictures but the 108 ELDM at 2165fps had no problem destroying both lungs. I snuck between the ribs high lung and still found fragments of the jacket in the heart so there was plenty of damage. There was even a piece in the knuckle of the front leg when I went to break the legs off, guessing it traveled down the leg to get there. Shot was taken leaning back against the ground (it was steep enough the hard part was keeping from sliding down hill) with my pack standing up in my lap. Spotting impact was not a problem.
Bull took three steps falling forward and the end of the third step was on his face. Down in 5-10 seconds. Very happy with the 6um/rokstock/vesper combo.

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That stock Why? I thought aspects of that paint job were photoshopped when i saw it previously.

 

[gabenzeke]

That stock Why? I thought aspects of that paint job were photoshopped when i saw it previously.

Holy crap, I just zoomed in to see what you're talking about. Hilarious.

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[Holt stewart]

That stock Why? I thought aspects of that paint job were photoshopped when i saw it previously.

Every time I’ve had a gun built in the last ten or so years and I’ve dropped it off for cerakote they’ve asked me what I wanted and my reply was “you can paint it pink and draw d!cks on it for all I care I just want it to shoot good” eventually I started thinking they didn’t believe me so we made it happen. It must be more obvious in pictures because when you hand it to someone they notice they pink and the word kindness but most people never even catch the rest. Where have you guys seen it before?


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[The Guide]

Every time I’ve had a gun built in the last ten or so years and I’ve dropped it off for cerakote they’ve asked me what I wanted and my reply was “you can paint it pink and draw d!cks on it for all I care I just want it to shoot good” eventually I started thinking they didn’t believe me so we made it happen. It must be more obvious in pictures because when you hand it to someone they notice they pink and the word kindness but most people never even catch the rest. Where have you guys seen it before?


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All fallisus aside, I like the color scheme and the layout. I'd rock that stock. One stock in pink, one in orange, and one in green would let you know which rifle you were grabbing.

Jay

 

[wind gypsy]

Every time I’ve had a gun built in the last ten or so years and I’ve dropped it off for cerakote they’ve asked me what I wanted and my reply was “you can paint it pink and draw d!cks on it for all I care I just want it to shoot good” eventually I started thinking they didn’t believe me so we made it happen. It must be more obvious in pictures because when you hand it to someone they notice they pink and the word kindness but most people never even catch the rest. Where have you guys seen it before?


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I think It was posted in the rokstock thread after it came out of cerakote.

 

[Holt stewart]

I think It was posted in the rokstock thread after it came out of cerakote.

Oh yeah, I forgot Ely put pictures up after he painted it. Someone must have snagged them and threw them up here.


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[BasicUtahrd95]

Sorry to bring up an old topic, but I just recently found this thread, read through the whole thing, and thought the in depth explanations of the way the 115 DTAC performs to be super interesting. If I understand this right, it fragments at high impact velocities (2200ish fps and above ?), tumbles at low impact velocities (down to 1500ish fps ?), or some combination of both at the velocities in between. Even though the specific way the bullet performs (fragments, tumbles, etc.) is highly variable from shot to shot, the amount of damage done is always impressive. Please let me know if I have missed something, as I have no personal experience with this bullet.

1. Of all the bullets that have been thoroughly tested, does the 115 DTAC have the widest range of impact velocities in which it is terminally effective? (3000ish-1500ish) Is there anything that comes close, or is better?

2. The 95 tmk, 108 eldm, and 103 eldx, are all highly recommended bullets that all seem to upset reliably on impacts above 1800 fps. What happens when they impact below 1800 fps? Why don’t they tumble like the DTAC?

 

[Formidilosus]

Sorry to bring up an old topic, but I just recently found this thread, read through the whole thing, and thought the in depth explanations of the way the 115 DTAC performs to be super interesting. If I understand this right, it fragments at high impact velocities (2200ish fps and above ?), tumbles at low impact velocities (down to 1500ish fps ?), or some combination of both at the velocities in between. Even though the specific way the bullet performs (fragments, tumbles, etc.) is highly variable from shot to shot, the amount of damage done is always impressive. Please let me know if I have missed something, as I have no personal experience with this bullet.

Generally that’s correct, however the DTAC really stops consistently, and heavily fragmenting around 2,400fps- sometimes- even often it will down to around 2,200fps. It’s variable, however generally destroys tissue well; though below 2,400’iah fps impact it is not my preference for deer as it often only yaws (tumbles) in the offside lung.

1. Of all the bullets that have been thoroughly tested, does the 115 DTAC have the widest range of impact velocities in which it is terminally effective? (3000ish-1500ish) Is there anything that comes close, or is better?

Much like the .224 77gr version, the 95gr TMK seems to upset consistently very well in those ranges.

2. The 95 tmk, 108 eldm, and 103 eldx, are all highly recommended bullets that all seem to upset reliably on impacts above 1800 fps. What happens when they impact below 1800 fps?

(Excepting the 95gr TMK) Sometimes they yaw inside the animal, sometimes they upset a little, and sometimes the stay generally point forward and show no upset and very narrow wounds.

Why don’t they tumble like the DTAC?

Sometimes they do. Longer for caliber projectiles yaw more consistently and readily. The DTAC is long, and the Nose ring seems to help it more consistently do so.

 

[BasicUtahrd95]

Generally that’s correct, however the DTAC really stops consistently, and heavily fragmenting around 2,400fps- sometimes- even often it will down to around 2,200fps. It’s variable, however generally destroys tissue well; though below 2,400’iah fps impact it is not my preference for deer as it often only yaws (tumbles) in the offside lung.






Much like the .224 77gr version, the 95gr TMK seems to upset consistently very well in those ranges.




(Excepting the 95gr TMK) Sometimes they yaw inside the animal, sometimes they upset a little, and sometimes the stay generally point forward and show no upset and very narrow wounds.




Sometimes they do. Longer for caliber projectiles yaw more consistently and readily. The DTAC is long, and the Nose ring seems to help it more consistently do so.

Thanks Form! I heard you on the Exo podcast a few months back and realized I knew nothing about terminal ballistics or bullet construction. I am still trying to wrap my head around it all, and the information you have been putting out is super helpful!

 

[djfergus]

I have several years of hand loading experience but never fire formed for wildcats. Would it be more common or more so uncommon for fire forming loads in the 6um to be as accurate as fully formed case loads?

 

[GoatPackr]

@djfergus A lot of people use a cheaper bullet for fire forming. Often times fire forming loads are accurate enough to hunt with. If a gun is biult right it will shoot good. And even better after fire forming.
You won't have any problems with the 6UM if UM biulds it.
It's no different than any other load. Load shoot and the next time you will be more accurate and better speed. It's not as complicated as people make it to be.

 

[rifletuner]

I have several years of hand loading experience but never fire formed for wildcats. Would it be more common or more so uncommon for fire forming loads in the 6um to be as accurate as fully formed case loads?

It is possible to get very good accuracy from fire forming loads. We are just in the process of forming necked down Lapua 6BR cases for my sons new 22 Dasher barrel for his PRS rifle. We tested the fire forming load from 100 meters out to 500 meters this weekend and he hit everything he aimed at. He will shoot the next couple of club matches with fireforming loads so he isnt wasting the components to form enough cases for a 2 day match.

 

[switchback270]

Any update on the Whidden dies?

 

[The Fish Box]

@Ryan Avery how’s the brass testing going??