The 6UM

[wy_will]

They made the prefits for the LS-Wild group buy. I have one; it shoots well.

LS Wild sends his reamers to them each time that he does a group buy.

 

[wysongdog]

They did move to Utah, but I still chose to use them since I have had good luck in the past.

I didn’t know they moved to Utah. Where at?

 

[benconfused]

Was it noted recently on an S2H podcast that the 6UM is performing better with a 1:7 rather than a 1:7.5 twist?

If so, what was the criteria around that? Was it for both the UM30 and UM40 versions, only for DTAKs, etc? @Ryan Avery

@wy_will - is your thumbs up a "yes" to my question or just that you like my post?

 

[rbutcher1234]

@wy_will - is your thumbs up a "yes" to my question or just that you like my post?

I don’t get how this is true when Ryan is in this very thread talking about blowing up a can with a 1-7 twist. I guess I would need to hear the full context.

 

[wind gypsy]

Was it noted recently on an S2H podcast that the 6UM is performing better with a 1:7 rather than a 1:7.5 twist?

If so, what was the criteria around that? Was it for both the UM30 and UM40 versions, only for DTAKs, etc? @Ryan Avery

I dont listen to every episode but i sure wouldn't spec a 7 twist for a UM and kind of doubt Avery would. Maybe if you're going really short it wouldn't be much of a problem.

 

[wy_will]

@wy_will - is your thumbs up a "yes" to my question or just that you like my post?

I just liked your question. I have barrels on order and I went with 1:7.5, but it might not be too late for me to change to 1:7 if that is working better.

 

[benconfused]

I dont listen to every episode but i sure wouldn't spec a 7 twist for a UM and kind of doubt Avery would. Maybe if you're going really short it wouldn't be much of a problem.

I certainly could have mis-heard. Not trying to start anything and was only looking for clarification.

 

[MagnumHntr]

At 3200fps a 7 twist is around 329,142 rpm
At 3200fps a 7.5 twist is around 307,200rpm

Does anyone know the top rpm for the TMK's

 

[Q_Sertorius]

The podcast is entertaining, but I would not base any purchases off what I think I heard on it. I’d end up mounting a fire extinguisher on the buttstock of my rifle to counteract the recoil.

 

[Ryan Avery]

Of the eight 6UMs I’ve built, the two most accurate had 7 twist barrels. Still, I wouldn’t think twice about using a 7.5T, since all of them have worked well for my hunting.

When I spoke with Sierra about using 116s in a 6UM, their two ballistics experts said a 7.5 twist would work, but they still preferred a 7T, and the 116 would handle it.

 

[rbutcher1234]

Of the eight 6UMs I’ve built, the two most accurate had 7 twist barrels. Still, I wouldn’t think twice about using a 7.5T, since all of them have worked well for my hunting.

When I spoke with Sierra about using 116s in a 6UM, their two ballistics experts said a 7.5 twist would work, but they still preferred a 7T, and the 116 would handle it.

@Ryan Avery what if we are still shooting DTACs?

 

[Ryan Avery]

@Ryan Avery what if we are still shooting DTACs?

Most of this has been with DTACs. I've only shot about 200 116s, all of them have been with a 7.5 twist. I think people are way too spun up about 7 or 7.5 twist

A 7.5 is gonna work with the DTACs or TMKs

 

[rbutcher1234]

All of this has been with DTACs. I think people are way too spun up about 7 or 7.5 twist

A 7.5 is gonna work with the DTACs or TMKs

Appreciate the clarification. I don’t know if the jackets/ability to take rotational force between DTACs and TMKs were different.

 

[wy_will]

Of the eight 6UMs I’ve built, the two most accurate had 7 twist barrels. Still, I wouldn’t think twice about using a 7.5T, since all of them have worked well for my hunting.

When I spoke with Sierra about using 116s in a 6UM, their two ballistics experts said a 7.5 twist would work, but they still preferred a 7T, and the 116 would handle it.

So what you’re sayin is, If you ordered a new barrel today, you would select a 7 twist? Gotcha Barrel order changed to a 7 twist.

 

[wy_will]

There are 115 pages and I prefer to not read them all. Any instances of anybody using the 6UM, or any 6 saum version, with a McGuire Copper Rose?

 

[IrkedCitizen]

There are 115 pages and I prefer to not read them all. Any instances of anybody using the 6UM, or any 6 saum version, with a McGuire Copper Rose?

Maybe ask in the reloading thread that is 12 pages

Thread '6 UM Reloading Thread'

Jun 16, 2023

Welcome to the official 6 UM reloading thread. This is the place to log and gather data for the new 6 UM cartridge. Content can range from fire forming to load data to long range external ballistics. The purpose of this thread is to become the reloading data center that will allow new adopters of the 6 UM to get up and running efficiently.
Let's do our best to keep this thread on track and uncluttered. When adding additional load data, contributors should continue to update their original post to make data easier to sort through. Questions are welcome but the primary purpose of the...

• PathFinder
• Replies: 230
• Forum: Reloading

• 

 

[lak2004]

There are 115 pages and I prefer to not read them all. Any instances of anybody using the 6UM, or any 6 saum version, with a McGuire Copper Rose?

Also that fancy search feature.....

 

[TradLife406]

There are 115 pages and I prefer to not read them all. Any instances of anybody using the 6UM, or any 6 saum version, with a McGuire Copper Rose?

I've found that Grok is really good at searching through the forum and summarizing the data.