6 UM Reloading Thread

[Axlrod]

I know it’s not the same parent cartridge, but I do assume some of the information being shared here will be interesting. For example, I now know it has been tagged “6 ROKUM”. Thanks for that! I liked the idea of not fireforming, and simply necking the 7 PRC down to 6mm. Again, it should be interesting!

No worries, just didn't want you to have any problems getting data from this 6UM reloading thread. I am thinking there will be a 6-7PRC/6 ROKUM thread to keep the data separate. I am building one on the 7PRC case myself. If they get 22 or 6 UM head stamped brass I will probably shift to one of those.

 

[RogerPa]

No worries, just didn't want you to have any problems getting data from this 6UM reloading thread. I am thinking there will be a 6-7PRC/6 ROKUM thread to keep the data separate. I am building one on the 7PRC case myself. If they get 22 or 6 UM head stamped brass I will probably shift to one of those.

I appreciate the information! Hopefully there will be a specific 6 ROKUM thread. I for one would be a fan. Thank you again!

 

[Doddse1]

Hey guys,

I wanted to ask here just to confirm I have the steps needed to build this. Correct me if I’m missing something (which is likely)

1. Order 6.5 SAUM from ADG or another high quality brass company.
2. Neck down that brass to 6mm SAUM.
3. Have a barrel chambered in 6UM. Reamer can be rented if I remember correctly? Or maybe ACE barrels can do it?
4. Start with a light load to fireform the brass?

Obvious issue is barrel life. Are you guys ordering the brass from UM directly?

My build will be a Tikka build with SS 20” barrel.

I’d be curious also as to the pricing you guys here are paying for if you are buying from UM directly.

Thanks for any help. I’ve really enjoyed reading up on all of these threads and I’ve learned a ton. I also am pretty certain I’ll be converting to leaving the 30 cal in the safe and trying out this 6UM on game for the foreseeable future


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[Doddse1]

Now that I’ve read up more on the 6UM thread. It appears this may ADG may be making some UM headstamped brass. You just set the neck tension and shoulder bump? Has anyone just necked down a 6.5 SAUM to 6mm without improving the shoulder?


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[wind gypsy]

Has anyone just necked down a 6.5 SAUM to 6mm without improving the shoulder?

People have. That's exactly what I'd do if I wanted a 6 based off a SAUM and it's exactly what we did with 7 SAUM brass to make 6.5 SAUMs before there was such a thing as 6.5 SAUM brass.

 

[GoatPackr]

Has anyone just necked down a 6.5 SAUM to 6mm without improving the shoulder?

Isn't that like just sticking the tip in?
Why not go all the way to a full 6 UM

Kris

 

[Doddse1]

Isn't that like just sticking the tip in?
Why not go all the way to a full 6 UM

Kris

I don’t know if I’d say just the tip. Maybe just wearing protection lol.

No for me fire forming may be a step I don’t want to deal with this summer. Have you hydro formed any? That could be something I can look into


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[Doddse1]

Isn't that like just sticking the tip in?
Why not go all the way to a full 6 UM

Kris

Also if you or anyone has any data on how much performance gain you get with the 40 degree shoulder vs the non id like to see it. I’m guessing 100-150 fps?


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[Jimbee]

If you use an improved 6 saum you'd need some special dies, no?

 

[Formidilosus]

I don’t know if I’d say just the tip. Maybe just wearing protection lol.

No for me fire forming may be a step I don’t want to deal with this summer. Have you hydro formed any? That could be something I can look into

I don’t understand why people think “fire forming” is such a task. Buy 100pcs of headstamped 6UM brass, load bullets, shoot, hunt with them if you want. Then you have a 100pcs of “formed” brass to reload, add a couple grains of powder, done.

 

[Doddse1]

I don’t understand why people think “fire forming” is such a task. Buy 100pcs of headstamped 6UM brass, load bullets, shoot, hunt with them if you want. Then you have a 100pcs of “formed” brass to reload, add a couple grains of powder, done.

Appreciate the input Form. Do you have an estimated round count through your barrel so far? Still staying with your same load you posted earlier?


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[Jimbee]

I don’t understand why people think “fire forming” is such a task. Buy 100pcs of headstamped 6UM brass, load bullets, shoot, hunt with them if you want. Then you have a 100pcs of “formed” brass to reload, add a couple grains of powder, done.

That doesn't seem like a big deal, but what about dies?

 

[BBob]

That doesn't seem like a big deal, but what about dies?

Unknown Munitions/Whidden. Post 379

The 6UM

Thanks for sharing, Ryan and formi. I appreciate the outside the box thinking compared to preconceived notions that exist in the hunting community. You've got improvement aspects in terms of internal, external, and terminal ballistics all rolled into one project. And Ryan, I thought that you...

rokslide.com

 

[GoatPackr]

I don’t know if I’d say just the tip. Maybe just wearing protection lol.

No for me fire forming may be a step I don’t want to deal with this summer. Have you hydro formed any? That could be something I can look into


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Fire forming is pretty easy. If people can't handle Fire forming then it's probably best to stick with factory ammo. It's as easy as loading any other ammo.
If concerned about burning out the barrel sooner then biuld on A Tikka and have them chamber the factory barrel with the 6 UM and have it for fire forming and spin a good barrel on after that.

Kris

 

[Doddse1]

Fire forming is pretty easy. If people can't handle Fire forming then it's probably best to stick with factory ammo. It's as easy as loading any other ammo.
If concerned about burning out the barrel sooner then biuld on A Tikka and have them chamber the factory barrel with the 6 UM and have it for fire forming and spin a good barrel on after that.

Kris

Agreed. Seems like the best option right now


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[Formidilosus]

Appreciate the input Form. Do you have an estimated round count through your barrel so far? Still staying with your same load you posted earlier?


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100-150’ish rounds. Hasn’t been shot much. Same load.

 

[Nova3795]

so has anyone hydro-formed UM brass? seems more convenient that fire forming

 

[Odd1out]

Fire forming is pretty easy. If people can't handle Fire forming then it's probably best to stick with factory ammo. It's as easy as loading any other ammo.
If concerned about burning out the barrel sooner then biuld on A Tikka and have them chamber the factory barrel with the 6 UM and have it for fire forming and spin a good barrel on after that.

Kris

What would be the caliber option in the tikka to do this? 243 and swap out the bolt face?

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[GoatPackr]

What would be the caliber option in the tikka to do this? 243 and swap out the bolt face?

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That's what I'm thinking.


Kris

 

[bow_dozer]

Got the new rig out on Sat. Did a small latter test 65-67 .5 increments. I know these are 3 shot groups so don’t castrate me. This point going to load up the 66.5 charge and see where it takes us.
Coal 2.890
Fire formed brass from UM.
Fed 210M