7mm SAUM build? - 24hourcampfire

I’ve been considering a .280 or .280 AI for quite some time. I’ve seen a few 1909 Argentine and K98 Mauser builds that were quite nicely built. Price range for such rifles was between about $900.00 to about $1,700.00. I’m just fishing here, but as I was looking into these two calibers I looked into many other 7mm cartridges. Despite the fact that I favor classic cartridges and I’m biased against short actions, ultra mags, super-duper magnums, etc., I began to read about the 7mm SAUM. Based upon what I read, this chambering seems to me like an excellent cartridge, useful for deer sized game up to moose at both “normal” hunting ranges and well beyond. Although I have never attempted to shoot at such distances, it’s nice to know that this cartridge is capable when I’m ready to start punching paper at long range.

In a departure from my “classic” rifle preferences, I was thinking about a hyper-accurate build including the following:

- Chambering: 7mm SAUM
- Action: American Rifle Co. (ARC) Mausingfield action (action must be CRF)
- Barrel: Kreiger? 1:8 twist w/ savage barrel nut
- Stock: 3 color GAP
- Bottom metal: ?
- Trigger: Timney
- Magazines: Alpha Industries Type 4

I feel pretty confident I could screw all this together myself, but I’d need to take it to a gunsmith to set the head space.

I'm sure I'd be happy with a .280 or .280 AI, but what say you about this whole idea?

HN,
Im in the process right now of trying to tweek a 7mm SAUM in a 17 pound 1000 yard BR rifle.
Its throated for 195g Berger EOLs and 197g SMKs.
Its been a challenge.
SO far its beating me.
I spent many years carrying a 280 AI for BG hunting.
My take is that the 280 AI would be alot more forgiving to deal with.

dave

You have a PM.

dave7mm: Thanks for the information. I'm sure you're correct regarding the .280 AI. I know you said your rifle is throated for the 195g Berger, but have you tried the 183g MKs? Check out this article: 7mm RSAUM

Doc: received and replied, thanks.

Go with the .280 Rem.

I do love the 7 SAUM.

Ken: That would certainly be easier... and cheaper.

If a long action I would go 280AI if a short action I would go 7 WSM just for the slightly larger case. But I stayed traditional with the AI and a 7RM.
The SAUM could be more accurate but hard to prove in a hunting rifle. Brass is sure a lot easier to find for the AI. If I wanted a real light weight almost magnum then the SAUM would get the nod. What ever you build it will be a good one with those components. Still on the fence about inherently accurate cases but a 30 degree shoulder and a shorter powder column along with a longer neck seem to be the ticket. The 280 AI has all those except the shorter powder column. If you wanted to get esoteric and had to have the 30 degree shoulder then go 280 RCBS.

Originally Posted by High_Noon

Ken: That would certainly be easier... and cheaper.

Yup.

Tejano: I read that the SAUM is more efficient than the WSM. DocEd mentioned that SAUM brass is scarce. I understand that WSM brass is even more difficult to find. Be that as it may, I think I mentioned that I strongly favor classic cartridges. I also favor classic rifles - for me, that means a long-action CRF, walnut and blued steel. This whole exercise was more about me breaking from my historic preferences and creating a thoroughly "modern" rifle chambered in a "modern" cartridge. I view such a rifle as being in a different class as those I typically prefer - not necessarily a better class - but in my view, a different class all together. I hate the term "tactical," but that term approaches my definition of a "modern" rifle - certainly not a dedicated benchrest rifle, but not a dedicated hunting rifle either. Although such a rifle could certainly be successfully used for hunting, I kinda' view it as more of a long-range/all purpose firearm. I was/am mainly interested in what the members here on the 'fire, who have experience using and/or building such rifles thought of my component choices and what I could expect in terms of weight, ergonomics and accuracy. Perhaps I was unclear in my original post.

Regarding cartridge choices, I do favor the classics - generally more tapered, which is why I like the .280 and the 7x64 Brenneke, but I would definitely consider the .280 AI. The 7x64 Brenneke is probably too similar to the .280 and too rare here in the U.S. to seriously consider.

If going 280 is there any reason not to go AI? Is brass available, factory loads available, can shoot standard 280 through it if needed - and pretty damn accurate too. Can get more performance from it than the standard, or slow it down if it shoots better that way. What is the downside?

Taco: No downside. All depends on what I can find when I'm ready.

I’m hoping to have Beanland or GAP start one for me next year. Defiance Deviant ultralight sheep hunter, Bartlein 2b, Manners SL or Mcmillan Hunters Edge stock. Maybe Hawkins alloy bottom metal.

Kimber7man: That sounds awesome. Have you considered the ARC Mausingfield action?

7 saum brass from norma is usually easy to get, just got some from midsouth about month ago, I love mine but do go with some sort of center feed, Ptg has 2 option of that bdl center feed and dbm bottom metal

Originally Posted by High_Noon

Kimber7man: That sounds awesome. Have you considered the ARC Mausingfield action?

Yes but I just prefer the Defiance.

I had a SAUM for a while, it is an excellent cartridge, the only reason I don't still have it is I had issues with the rifle it was chambered in. It was a Remington 700 with feeding issues, but it shot 1/2 MOA out of the box. I would choose it over a WSM because it fits better in a short action. The WSM doesn't have enough more powder capacity to make enough enough difference to notice in the field.

jotrott: Duly noted.

7 wsm brass should be much easier to source now that hornady is going to be producing it ...

No but I did put some time in with the 180g Berger hybrid.
dave

Some info from Accurate shooter. http://www.6mmbr.com/7mm284.html
They seem to prefer the 7SAUM and the velocity difference between it and the WSM is only 30 fps with their loads. I favor cartridges that have Lapua available as an option.
Another one to consider is the plain .284 gets better barrel life than the 6.5 version. But any of the cartridges mentioned would be good.

Tejano: Thanks. I did see that article previously.

In the Nosler reloading manual #4, you will see loads for the std 280 with IMR 7828 with 160g at 2950 as, "the most accurate load". I shot it for years with the 160g Sierra BTSP, deer flop.

The 280 AI is a dandy, no feeding issues, easy to work up loads for from 120g to 168g that I have tried.

keith: Thanks. Good to know you didn't have any feeding issues with the AI, which I was concerned about due to the steep/small shoulder. Realistically, I'll probably end up with a 1909 Argentine or K98 in either .280 or .280 AI, depending on what I can find when I'm ready.

I always wanted a 7x64 AI for some perverse reason. Or better yet a 7x65 AI in a nice falling block action say a Dakota M10.

Pm sent to high noon

Tejano: I've wanted a 7x64 Brenneke for quite long time as well. I'm not really sure why since it's essentially the ballistic twin of the .280 Rem.

Bella1: Received and replied.

I am a huge 7 Saum fan , for me the brass is a non issue as I stocked up on Remmy years ago plus have a ton of Norma , easily attainable. It feeds smooth as silk out of Gen 1 HS Precision bottom metal.

My favorite 7 saum rig started off as a BDL Stainless with a 24" factory barrel. I took it off had it cut to 22" target crown added and out of vanity mainly ( plus a little weight loss) had it fluted and reassembled.

Added a Boyds Featherweight Thumbhole that I ground to fit my hand , cerakoted the Barreled action and worked up some loads with the 140 TTSX and 140 ABs that pump out at around 3k and produce .25 and less groups both behind BR2s and H4831SC ( only neck size) . Neither bullet has the highest BC out there but crush through everything, expand great and always leave an exit which is important to me as I only hold first exposed rib behind shoulder and above heart. I don't like to waste any meat and always want an intact heart for its delicacy alone.

Brass life is great, barrel isn't showing a bit of wear after around 500 down the pipe and I don't expect to ever wear her out as my paper punching and gong tinging days are mainly over , its mostly a hunting rig these days. I really can't say enough about the cartridge though I do often ponder a 7/300 wsm just for giggles and will likely build a 7 LRM sometime in the future.

Strick9: Thanks for the info on the SAUM. That 7 LRM looks interesting as well.

Originally Posted by elkhunternm

Go with the .280 Rem.

Originally Posted by High_Noon

Ken: That would certainly be easier... and cheaper.

And equally effective.