6PRC vs 6UM

[Split toe]

Anybody shooting 6PRC? Thoughts on it vs 6UM? I know 6UM is pushed hard on here, why it over 6PRC?

 

[Cameron.25]

There is a thread on 6 prc but i think only one or 2 guys here are using them. huntnful is one of them. I personally thought about a 6 prc since i have 6.5 dies/components but decided to stick with 6.5 again this time. I already have a wildcat in the works and one is enough for me right now

 

[Ryan Avery]

The 6UM was designed to get the most out of an SA 6MM case.

The 6UM is 100+ FPS faster than the 6PRC.

The most significant advantage of the 6PRC is brass availability

 

[B23]

Anybody shooting 6PRC? Thoughts on it vs 6UM? I know 6UM is pushed hard on here, why it over 6PRC?

The 6 & 6.5 PRC are basically ballistic twins to the 6 & 6.5-284. The PRC needs a mag bolt face where as the 6-284 uses a standard bolt face but the PRC works better in a short action and the 6-284 needs an extended mag box to get the most out of it if used in a short action.

The 6UM is a necked down and "improved" SAUM case so the 6UM will have more case capacity and shoot the same bullet/s faster then the 6 PRC.

For me, the benefit to the 6PRC vs 6UM is the 6PRC is a straight neck down and you're good to go but the 6UM requires fireforming. Fireforming certainly isn't anything difficult but it is another step that has to be done and I find the older I get the less I enjoy extra steps.

Then there's the whole barrel life argument but I've never really been very concerned about barrel life so it's a moot point to me.

 

[Arithson]

The 6UM was designed to get the most out of an SA 6MM case.

The 6UM is 100+ FPS faster than the 6PRC.

The most significant advantage of the 6PRC is brass availability

Ryan, what happens if a guy necks down a 7 PRC to 6mm? Too much pressure? Just a thought I’ve had for brass availability

 

[Axlrod]

Ryan, what happens if a guy necks down a 7 PRC to 6mm? Too much pressure? Just a thought I’ve had for brass availability

Too much pressure comes from too much powder!

Here is a thread on the 6/7 Prc

6 UM or 6-7PRC?

@Ryan Avery @Formidilosus @UM GM @Unknown Munitions What are the pro/cons of 6 UM vs 6-7PRC in a Tikka action? As of today, have to fire form for 6 UM, but will that be changing soon? Has a 6-7PRC been built and tested yet? Magazine issues? My future Rokstok wants to know…

rokslide.com

 

[Split toe]

Just bumping this for more thoughts...

 

[Jgormond3]

Interested in a 6UM or 6PRC and wanting to know if the juice is worth the squeeze or is 6PRC easy button just the better route to go?

 

[sololearn9]

I think your 6 PRC should get you close. But, hear me out… 6x7 PRC.

If you’re going to be a bear, be a grizzly

 

[doc holiday13]

The 6UM is a necked down and "improved" SAUM case so the 6UM will have more case capacity and shoot the same bullet/s faster then the 6 PRC.

Do you know why the should went to the improved instead of just a straight neck down? Does it create slightly more case capacity?

Do you know what kind of "gap" there is in performance between the 6 SAUM and 6 UM?

 

[huntnful]

Interested in a 6UM or 6PRC and wanting to know if the juice is worth the squeeze or is 6PRC easy button just the better route to go?

From what I can see, the new ADG 6 UM 40 degree brass and 40 degree reamer would actually be the best easy button for big 6mm now. No necking down, no fire forming and no special dies.

If that is all correct of course?

 

[BBob]

If that is all correct of course?

As far as I see there is no 6UM-40 available, only the 6UM-30 that has to be fire formed.

 

[huntnful]

As far as I see there is no 6UM-40 available, only the 6UM-30 that has to be fire formed.
View attachment 842657View attachment 842658

I had my numbers backwards then I guess? The UM is the 40 degree? So the 30 wouldn’t need to be formed. But they’re selling a reamer for that as well. So it’s a simple load and shoot. Brass matches the reamer.

As far as I’ve gathered anyways. Thank you for the correction!

 

[doc holiday13]

I had my numbers backwards then I guess? The UM is the 40 degree? So the 30 wouldn’t need to be formed. But they’re selling a reamer for that as well. So it’s a simple load and shoot. Brass matches the reamer.

As far as I’ve gathered anyways. Thank you for the correction!

Is the UM-30 just a 6 SAUM? Correct me if I'm swinging like a blind man.

I do remember hearing a podcast with the ADG guys and there is something about the 40 degree shoulder and body diameter or neck diameter that doesn't jive

 

[huntnful]

Is the UM-30 just a 6 SAUM? Correct me if I'm swinging like a blind man.

I do remember hearing a podcast with the ADG guys and there is something about the 40 degree shoulder and body diameter or neck diameter that doesn't jive

Yes, it’s just a 6 SAUM.

But it’s going to come stamped as 6 UM for those that want to fire form it. It’ll also have its own reamer because the base to shoulder might be a hair longer than if you just necked down a 6.5 SAUM case.

 

[TalusHunterCA]

Anybody shooting 6PRC? Thoughts on it vs 6UM? I know 6UM is pushed hard on here, why it over 6PRC?

How about just a custom .240 Weatherby or a 6mm-06?

 

[WeiserBucks]

WBY brass is less than desirable.

 

[TalusHunterCA]

WBY brass is less than desirable.

Isn't it produced by Norma? In any case, I hear you about the belt, less efficiency etc...but it's worked for decades and ammo is readily available

 

[2Stamp]

Isn't it produced by Norma? In any case, I hear you about the belt, less efficiency etc...but it's worked for decades and ammo is readily available

I've also read some of it's Peterson. So who knows.