The 22UM

[Ibex]

@Ryan Avery are you sure you are not a Texas boy? Fetish for fast 22’s runs deep here in the south lol. Been running 88’s in a 22-250 for a couple years now.

May need a new tread but tell us more about this 22-250. barrel twist, velocity, etc.

 

[brockel]

We’re going to find out. Though I am much more interested in 77gr TMK, 88gr ELD-M and 80gr ELD-X.

80 grain eldx in the works?

 

[MuleyFever]

Down here in southern Utah folks are shoulder shooting elk with 243 win varmint loads and wondering what went wrong.

People in southern Ut also drink tequila with mountain dew
just sayin

Glad I haven't run into these folks yet.

 

[amassi]

80 grain eldx in the works?

Hornady announced a couple months ago when they released the saami spec 22 creedmoor


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[khuber84]

I think the 88 eldm or 90 atip will be tough to best. I know the 90s have a legit 307g7 bc to 1250y at 3100fps from a 7tw. 88s are near 0.280-285 from all I've read. I know the 88s expand reliably, however I've never put an atip on game.

 

[Ryan Avery]

@Ryan Avery are you sure you are not a Texas boy? Fetish for fast 22’s runs deep here in the south lol. Been running 88’s in a 22-250 for a couple years now.

HAHA!

No, but I am a huge Dallas Cowboys fan.

The 6 and 22UM are all about hit rates.

 

[PNWGATOR]

HAHA!

No, but I am a huge Dallas Cowboys fan.

The 6 and 22UM are all about hit rates.

And massively effective wound channels.

 

[Reburn]

Ngl that sounds delicious


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squirt zero,
blanco tequila
a splash of lime juice.
You can thank me later.

 

[Kimber7man]

squirt zero,
blanco tequila
a splash of lime juice.
You can thank me later.

We sub Fresca for squirt zero...

 

[MEdude]

This was the goal from the very beginning (at least for me). A high BC .224 bullet at 3,500 to 3,700fps MV. Hit rates and danger space maximized, recoil minimized.

This looks like a very cool project.

Having read the 223 Mega Thread, the 77 TMK’s terminal performance surpasses all other current options, while the 88 ELD-M has superior external ballistic. As I understand, one performs better when it gets there, while the other should have a higher hit rate at greater distance.

Is there a distance threshold where given adequate terminal velocity, superior external ballistics supersede superior terminal performance? What push one or the other to be the projectile of choice in a given application?

 

[Formidilosus]

This looks like a very cool project.

Having read the 223 Mega Thread, the 77 TMK’s terminal performance surpasses all other current options, while the 88 ELD-M has superior external ballistic. As I understand, one performs better when it gets there, while the other should have a higher hit rate at greater distance.

Yes and no. The 88gr ELD-M creates good wounding. I may slightly prefer the 77gr TMK shape or characteristics- but it isn’t a large difference.

Is there a distance threshold where given adequate terminal velocity, superior external ballistics supersede superior terminal performance? What push one or the other to be the projectile of choice in a given application?

The biggest difference between the ELD-M and TMK lines pretty much across the board, is that the jacket is slightly thicker on the TMK and it has a larger nose opening under the tip- both contribute to slightly deeper penetration generally and a lower velocity threshold for upset over ELD-M’s. The difference isn’t something to get hung up on however.

For me, if I will be shooting animals past 600’ish yards regularly with the setup, I generally would choose the 88gr ELD-M due the BC for wind. If under 600’ish yards I will generally choose the TMK as wind is easier to judge for me. All that aside, the 88gr ELD-M rates building a rifle around.

 

[MEdude]

ELD-M due the BC for wind. If under 600’ish yards I will generally choose the TMK as wind is easier to judge for me. All that aside, the 88gr ELD-M rates building a rifle around.

Just the clarity on the two bullets I was looking for. I suppose an additional 100K rounds and a few hundred additional harvestings would have enabled me to come to the same conclusion on my own.
That’s just a 20 year head start you handed out.

Seriously, Thanks for taking the time, and showing the willingness to share your experience. I’ve benefitted greatly, and will try to follow pass along to others lessons learned.

 

[Formidilosus]

Just the clarity on the two bullets I was looking for. I suppose an additional 100K rounds and a few hundred additional harvestings would have enabled me to come to the same conclusion on my own.
That’s just a 20 year head start you handed out.

Seriously, Thanks for taking the time, and showing the willingness to share your experience. I’ve benefitted greatly, and will try to follow pass along to others lessons learned.

No problem. Share what you find if you try them.

 

[khuber84]

The oddity of the 77tmk, it has a very long bearing surface for it's weight, nearly the same as an 88eldm, maybe 20k shorter. It's def longer than say an 80eldm or 85.5 hybrid.

 

[MEdude]

Perhaps that is a function of design to enable a shorter COAL, so as to facilitate standard AR mags…???
Just speculation on my part.

 

[Redbaron307]

Looks like I’ll need one!

 

[wind gypsy]

Perhaps that is a function of design to enable a shorter COAL, so as to facilitate standard AR mags…???
Just speculation on my part.

That has always been my assumption on the design basis and I've seen other people say it is.

 

[MEdude]

That has always been my assumption on the design basis and I've seen other people say it is.

Pretty sweet little echo chamber we are building.

 

[amassi]

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Pretty sweet little echo chamber we are building.

Straight from sierras website
“Another benefit is reliable feeding in magazine fed firearms. The 77 grain Tipped MatchKing (TMK) allows seating to an OAL that permits cartridges to be loaded into M16/AR15 magazines.”


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[MEdude]

Straight from sierras website
“Another benefit is reliable feeding in magazine fed firearms. The 77 grain Tipped MatchKing (TMK) allows seating to an OAL that permits cartridges to be loaded into M16/AR15 magazines.”

Are you telling me I’m in an echo chamber filled with geniuses????
Seems about right.