Tell me abt the 7 SAUM, your thoughts

[Buttermilk]

The 7mm RSAUM is an excellent cartridge. It's overlooked nowadays, and should be much more popular than it is.

My 7 RSAUM is built on a Remington XP-100 with a Bartlein 5R 17.5" barrel, 1:9" twist. I would choose a slightly faster twist if 180-195 grain bullets were on the menu. I planned to only shoot 162-168 grain bullets however, due in part to my expected velocity window with the 17.5" barrel.

I get 2850 fps with Berger 168 VLDH's, Hornady 166 A-Tips and Hornady 162 ELDX's using H1000. Accuracy is 1/2 MOA, and I've shot out to 1,100 yards with my XP-100 on steel.

With your 22" barrel you will get at least 25 fps per inch increase of barrel length, and then some more using RL26.

 

[7mm man]

I hadn't heard of the Unknown Munitions DBM, so I looked it up. Do you know if I can use the 3.125" mags with an Impact? It didn't really say. I was glad to see you had a Saami chamber, I was unsure on the freebore but it seemed most who used it in SA, used a saami spec freebore.

Check your action. Can it handle that long of a coal in the bottom where the cartridge comes in? I would also call UM they are great.

 

[kublak]

Built a 7SAUM on a Defiance AntiX, Proof carbon wrapped 20inch barrel early 2024. It's on an XLR Element 4 mg chassis w/ folding but stock.. Using a TBAC suppressor and NX8 scope. I am shooting Berger 180 Hybrids at 2850 fps. Light weight, easy to hike with and very accurate, used on two hunts thus far with great success.

 

[DLJ6]

I've been so impressed with my factory 700 SS 300SAUM that there are definitely custom .257 and .284 versions in my plans. Researching actions and stock options now.

 

[Rick Richard]

I have a 7SAUM built by LPR on a 22" Proof and Defiance AntiX Medium action topped with NX8 4-32. I shoot HH 143 suppressed at 3039 fps.

 

[ARlife4me]

Depending on if you reload I'd go medium action, if not short is fine. I have a frankenAR in 7saum 8t 28" and hoping to get 2850-2900fps w/195eol's? I can load to 2.865". If you're planning on ever using mono's you'll need 1/2 to 1 full twist faster. 165-168 are the natural in 28cal as they're in 30cals best of both worlds! Short actions don't do saum's justice for anything over 175. I couldn't get a 7 or 7.5 twist from the maker or I'd be shooting 197smk's in it.

 

[ARlife4me]

If you go Tikka, all you'll need to do is change bolt stops and mag for that length(from what I've read).

 

[brianandbeth]

I built my 7 saum on defiance long action. Running 24" 1-8.4 twist proof barrel. I throated it out .370" and am running 175 bergers. 60.1 gr of 7828 sets it right around 2990 - 2995. Super fun round for hunting.

 

[KH_Outdoors]

Great cartridge option! Known for its efficiency & inherent accuracy. My current 7 saum is on a Lone Peak Fuzion Ti Medium, with a 22" Benchmark Carbon. Short or medium actions are fine. I prefer it suppressed, but otherwise a small brake. My accuracy loads with 175/180's regardless of powder seemed to always come in at 2800-2850, accuracy dropped off above that even with RL26/N560 types. My personal favorite loads are with the 143 gr McGuire mono's & N560 going 3100 suppressed (I call that combo the cheat code in a 7 saum). Good luck man, and if you need some brass I was just considering listing some I have extra.