Shorty 7SAUM

[Bater]

I have an 18” suppressed 7SAUM being put together for elk/muley backpack hunts. It’ll be a long bolt stop and mag T3x sitting in a MDT HNT26 folder. Load work up will focus on 160 class Eldx, Eldm, Bergers and TGK’s. Would also consider 180 Eldm/Hybrids if I thought I’d have enough steam to push em. Only interested in temp stable powders.

For those that have done a shorter SAUM, what did you run? What speeds were you able to push the 160s?

 

[codym]

I don’t know if it’s considered all that short but I have a long action origin with a 22’ bartlien cut with a longer freebore. 180 Berger hybrid, ADG brass, 64 gns of h1k 2900 fps. Primers look good no visual signs of pressure. Shoots clover leafs. 7 saum with 180 hybrids on the left 6.5 prc with 156 eol on the right

 

[Bater]

Nice looking set up! The one thing keeping me away from a 22” barrel is my plan to use a suppressor. Have you found that set up too long? This will be open country deer/elk.

 

[codym]

I definitely wouldn’t go longer. I only run suppressed. I feel like it’s still plenty handy with my tbac dominus. I’m doing range work with my Magnus RR. I definitely think 4’ vs 100 fps is worth the trade off but I hunt out west and not out of a blind or thick cover.

 

[uglymud]

Have a PBB 18" 7 SAUM, SAAMI spec chamber, with 62gr of N560 I'm moving 168 VLDH at around 2850.

I'm just passing 100rnds and hope it speeds up a bit. Also not seeing any pressure signs so I could probably push more, but this makes nice groups

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[waspocrew]

20” Gunwerks Magnus here. Tried the 160 Accubond and RL-23, accuracy was fine but the 145 LRX was way more consistent at 3040 with H4831.

 

[Bater]

Have a PBB 18" 7 SAUM, SAAMI spec chamber, with 62gr of N560 I'm moving 168 VLDH at around 2850.

I'm just passing 100rnds and hope it speeds up a bit. Also not seeing any pressure signs so I could probably push more, but this makes nice groups

Sent from my SM-S908U using Tapatalk

That’s what I needed to see, for me 2850 would be plenty of speed with the 160 class bullets.

 

[huckfin]

I have a 16" 7rsaum, I'm pushing 150gr eldx at 2815 with H4831sc. Tried varget and h4350 and they were about 25-50fps slower.

 

[Bater]

Great info, I’ve thought about running a 150 as well.

 

[wind gypsy]

22" long action Tikka and i've really only shot 175-180s in it but low 2800s over H4831 or H1000. Also, 145 CEB Lazers over h4350 at about 3050 FPS.

This was the first rifle I hunted with suppressed. 22" plus TBAC u7 was too long for me to want to hunt with. I've moved to mostly smaller cartridges and 18" barrels and haven't shot the 7 much in recent years. It might just become my dedicated "long range" rifle with a can now and not see action in the thick stuff. I bet it behaves nicely with some of the new cans with brakes.

 

[haydenmp]

20" with a dominus, 175 EH, 61g n560, medium action, adg @ 2840. 9.5 lbs. shoots really well in all conditions/elevations/temps. Manageable recoil for the awkward positions I find myself in.


Real happy with it, but I'm a tinkerer. Every time I think about testing different bullets or powders for it I'm reminded of profound words of Alan Garner:

 

[Bater]

22" long action Tikka and i've really only shot 175-180s in it but low 2800s over H4831 or H1000. Also, 145 CEB Lazers over h4350 at about 3050 FPS.

This was the first rifle I hunted with suppressed. 22" plus TBAC u7 was too long for me to want to hunt with. I've moved to mostly smaller cartridges and 18" barrels and haven't shot the 7 much in recent years. It might just become my dedicated "long range" rifle with a can now and not see action in the thick stuff. I bet it behaves nicely with some of the new cans with brakes.

Good info on the 22” + can. I definitely think that would be a little long for me as well, just trying to decide between 18” and 20”. The short/compact Airlock Industries 7mm Zero Gravity will work out perfectly for this build.

 

[uglymud]

Good info on the 22” + can. I definitely think that would be a little long for me as well, just trying to decide between 18” and 20”. The short/compact Airlock Industries 7mm Zero Gravity will work out perfectly for this build.

Even at 18" with an ultra 7 I get hung up in the thick stuff, I'm not sure a couple inches either way would help much.

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[Bater]

20" with a dominus, 175 EH, 61g n560, medium action, adg @ 2840. 9.5 lbs. shoots really well in all conditions/elevations/temps. Manageable recoil for the awkward positions I find myself in.


Real happy with it, but I'm a tinkerer. Every time I think about testing different bullets or powders for it I'm reminded of profound words of Alan Garner:

I just picked up a couple lbs of N560 but have no experience with it as of yet. Only complaints I’ve heard have been with temperature stability, though it seems you’ve had no glaring issues in this area. That’s good to hear. Every powder varies with temperature swings, I just don’t want to deal with extreme changes in the 60°F - 0°F of Oct/Nov in Idaho.

 

[haydenmp]

I just picked up a couple lbs of N560 but have no experience with it as of yet. Only complaints I’ve heard have been with temperature stability, though it seems you’ve had no glaring issues in this area. That’s good to hear. Every powder varies with temperature swings, I just don’t want to deal with extreme changes in the 60°F - 0°F of Oct/Nov in Idaho.

Anecdotal, so ymmv, but I don't notice it to be really any more or less sensitive to temperature than any of the other powders I have used that are in this class. I don't have any data that shows .75 fps/degree or whatever, but I haven't seen crazy unexpected numbers during chrono when its hot or cold.

 

[Kimber7man]

20" with a dominus, 175 EH, 61g n560, medium action, adg @ 2840. 9.5 lbs. shoots really well in all conditions/elevations/temps. Manageable recoil for the awkward positions I find myself in.


Real happy with it, but I'm a tinkerer. Every time I think about testing different bullets or powders for it I'm reminded of profound words of Alan Garner:

I’m at 2,880 with 22” barrel, 61.0 N560, ADG, F210M so right there with you.

59.5 R23 gave me better groups but was only 2,814 fps, but with great ES and SD.

 

[Decker9]

I’m shooting a 20” IBI on my 7 Saum, running 168 vld’s at 2930 fps with 62.5gr of H1000. Iv went up to 64.5gr of H1000 and shot well at 3000 fps, but got clickers on 2nd fired brass and 2-3 firings on ADG before loosening primer pockets. So far on 4th firings at 62.5 and haven’t had any more issue.

 

[mauiarcher]

Going through the debate myself ATM…..barrel length and action. Probably not much of a difference between 20-22 and since I already have a 22” 7prc, leaning toward short action 20”. If I want to push the heavies I can call up the prc and looks like SAUM may be able to get close to 2900 with the 168 Berger’s.

 

[rootacres]

Going through the debate myself ATM…..barrel length and action. Probably not much of a difference between 20-22 and since I already have a 22” 7prc, leaning toward short action 20”. If I want to push the heavies I can call up the prc and looks like SAUM may be able to get close to 2900 with the 168 Berger’s.

Getting to 2900 with 168 Bergers won't be an issue. I have a 21" PROOF, it sends 168s at 2950fps out of a short action. I went with a Bighorn action and on mine. I just got an anTi X and am considering having a couple more barrels for it.