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This is with a .188" freebore reamer, case OAL of 3.020". If you push the bullet in the case more, lighten up, farther out, maybe up charge.
First one start, 2nd upper end.
I shoot 180 hybrids 8 off the lands, 210M primer.
Crap, they are backwards, not redoing.
First one start, 2nd upper end.
I shoot 180 hybrids 8 off the lands, 210M primer.
Crap, they are backwards, not redoing.
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im loading 180 hybrids with n565 now. 60,7 grains, 79mm col. getting aruond 904ms on a 74 cm barrel. i tried 180 eld but it wout not gruop a bit, got pressure signs aruond 64 grains with the 180eld, and aruond 62 with the 180 hybrids.
im using norma brass and a tikka action with a lilja 1-8 barrel
im using norma brass and a tikka action with a lilja 1-8 barrel
So I finally got my PVA shouldered prefit in 7mm RSAUM on my SA nucleus and did some load development. I’ve only tried 180 eld’s, H1000 and re-26. I started by loading to mag length and shot H1000 between 63.0 and 64.2 in 0.2 gr increments. None of those groups shot less than 1 moa. Mag length was about a 0.050" jump with the eld with my throat so maybe mag length isn’t going to work for me.
I tried loading into the lands and single feeding, it got a little better, but not ideal. It was only trying 0.010" jump did I find a consistent sub moa group. The ONLY load I could find was 63.8 gr H1000 with the 180 gr eld with a 0.010" jump that shoots consistently with any accuracy. The only problem is my velocities aren’t that great. Using virgin Norma brass, 63.8 gr of H1000, my average velocity is 2894 ft/sec with an ES of 44 with a SD of 18. Target is below.
I wanted this barrel to shoot out to a mile, but those velocity spreads are going to give me some pretty bad vertical strings. Overall, I’m not very satisfied with the 7mm saum. I guess I could try to use a bullet in the 160 gr class, but the bc’s of the 180’s are important to get out to a mile.
I tried loading into the lands and single feeding, it got a little better, but not ideal. It was only trying 0.010" jump did I find a consistent sub moa group. The ONLY load I could find was 63.8 gr H1000 with the 180 gr eld with a 0.010" jump that shoots consistently with any accuracy. The only problem is my velocities aren’t that great. Using virgin Norma brass, 63.8 gr of H1000, my average velocity is 2894 ft/sec with an ES of 44 with a SD of 18. Target is below.
I wanted this barrel to shoot out to a mile, but those velocity spreads are going to give me some pretty bad vertical strings. Overall, I’m not very satisfied with the 7mm saum. I guess I could try to use a bullet in the 160 gr class, but the bc’s of the 180’s are important to get out to a mile.
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Is this a standard SAMMI chamber?
Cut or button?
Almost 2900 would be acceptable to me.
Fired brass, different primers and some more barrel mileage might improve your SD’s as well.
I’d also try more jump ranges.
I was thinking about having PVA do my 7SAUM barrel but I wanted longer than 26” so I went elsewhere.
Cut or button?
Almost 2900 would be acceptable to me.
Fired brass, different primers and some more barrel mileage might improve your SD’s as well.
I’d also try more jump ranges.
I was thinking about having PVA do my 7SAUM barrel but I wanted longer than 26” so I went elsewhere.
Here is my data for my 7saum with h1000 running 2900fps. It’s plenty with those bc’s
I’m ok with the speed and I agree that fired brass might help. It is a cut barrel. I’m thinking it should speed up with a little more mileage.
Some more data for you.
My 7 SAUM has an .040FB.
Norma brass, fed 210, H1K at 62.7.
180 ELD.
28 inch Benchmark
This is 2.920 oal...mag fit and .020 off lands.
2880 fps, sd 10... this is over about 30 rounds..
.5 moa vertical out to 1K
Hope you get your working
My rifle just got finished last week. I'm looking for a good starting point for RL 26 and the 180 ELDM. The Alliant website does not provide any data for the 7 SAUM. I have heard that folks are finding RL 26 to work really well and I already have some on hand.
The search feature on this thread also does not produce any results for RL 26.
The search feature on this thread also does not produce any results for RL 26.
I shot some 26 in mine with a 180 hybrid, so use discretion here, but you should end up between 59 - 62.5gr.
In my experience 26 is way faster than h1000. I didn't get any accuracy in mine. I shot from 60.5 up to 63. My velocities were between 2900 and 3050 with a 180 eld.
I tried both and couldn’t get a good load with 26 but my buddy did with 61.6. I did however get a load with h1000 at 63gr and it’s moving at 2900 which is fast enough for me. My buddy is running over 3k with 26.
I'm starting a 7 SAUM build and am looking for recommendations for bushing size for sizing die. I plan on using the Redding Type S Match 2 die set. What size are you using with which brand of brass? I'm only finding Norma brass in stock.
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How do you like the ADG brass? It was my first choice, but no availability until October 2019.
at 2.920 that bullet has to be way down inside the case. as much as I wanted to, I didnt have any luck with the 180eld in my short action. I assumed it was because the bullet was so far into the case. actually past the shoulder
Did you use a SAAMI reamer or custom? Looks like no issues stabilizing with a 1-8 twist barrel.
I had the reamer cut for shooting 180 VLD's in a short action. It is a .320 nk .040 FB. The FB is much shorter than SAAMI. If you would like, I can get you a copy of the print.
My loaded necks are .315 with Norma brass.
I wouldn’t mind seeing that print.
I went with a SAMMI print reamer for the barrel I ordered.
I’m trying R23 with the 168 VLD, with 57.0 I was at 2,750 in a 23.5” 700 Ti with Ultra 7 suppressor. Would love to get 2,900. Will R23 get me there or should I go to R26?
Messed around with the 7SAUM a bit more recently. Hadn't shot it in what seems like a year.
180 ELD-M
2.95 COAL (big jump, barrel is throated long),
RL26 60.0gr
210M primer
30" 8 twist heavy varmint barrel
2970 fps
Did pretty well at a mile. BC trued up to an unimpressive .348 G7 at that distance, potentially influenced by transonic performance. Shooting at a full size IPSC, slightly bladed, so about 0.2 mils wide. Good calm conditions so went 3/3 once I got elevation dialed in.
180 ELD-M
2.95 COAL (big jump, barrel is throated long),
RL26 60.0gr
210M primer
30" 8 twist heavy varmint barrel
2970 fps
Did pretty well at a mile. BC trued up to an unimpressive .348 G7 at that distance, potentially influenced by transonic performance. Shooting at a full size IPSC, slightly bladed, so about 0.2 mils wide. Good calm conditions so went 3/3 once I got elevation dialed in.
My smith said reamer is going to be there this week so my 7SAUM barrel should be here really soon.
I’m excited!
I’m excited!
ADG 7 saum brass all brand new.
ELD-m 180’s @ 2.95
H100
62=2805
62.5=2831 SD 9
63=2855
all three shot really well at 1125 yards today.
recoil was amazingly light.
ELD-m 180’s @ 2.95
H100
62=2805
62.5=2831 SD 9
63=2855
all three shot really well at 1125 yards today.
recoil was amazingly light.
I haven't measured it, but it's a LOT. Bought the barrel from someone else who had it throated to single feed F-Class in a short action. I think maybe long enough for it to keep the bullet bearing surface above neck/shoulder junction.
Wouldn't surprise me if I'm jumping 100 thou or more.
I had one that was jumping about .300 and shot better than any other chamber I've tried. So I'm always curious of everyone's chamber especially with 180 eld_m
I have to single feed my 7 SAUM in a short action Nucleus with the 180 eld. I got a shouldered prefit from PVA, but I'm not sure what chamber he uses. If I were to mag feed from an ARC magazine, I was getting a silly amount of jump and terrible accuracy, between 0.8-1.6 MOA. Single feeding with about a 0.02" jump I can get about 0.5 MOA. It's a project I put together to try my luck at a mile, so single feeding doesn't bother me.
175 ELD-X
Fed 210M
H4350
Norma brass
.005 jump 24" Proof barrel
I tried H4831 based on my 6.5-06 experiences and could not get the velocity I wanted out of a 24" barrel. Based on several "internet experts" I decided to try H1000 later since I wanted the gun up and running for hunting season. In parallel I tested what my gunsmith suggested which was H4350. Another conversation at a TBAC suppressor demo has me wanting to test RL17, but in reality H4350 is less powder, I use it in other calibers and it just works. Also it's consistent and well under an MOA if I do my part.
Fed 210M
H4350
Norma brass
.005 jump 24" Proof barrel
I tried H4831 based on my 6.5-06 experiences and could not get the velocity I wanted out of a 24" barrel. Based on several "internet experts" I decided to try H1000 later since I wanted the gun up and running for hunting season. In parallel I tested what my gunsmith suggested which was H4350. Another conversation at a TBAC suppressor demo has me wanting to test RL17, but in reality H4350 is less powder, I use it in other calibers and it just works. Also it's consistent and well under an MOA if I do my part.
Some more numbers from today
H1000
Adg brass.
180 eldm’s @2.95 it cci#200’s
63.5 2895 sd 10
64.0 2908 sd 5
64.5 2935 sd 11
All three shot within 5/8 with 5 shots.
IMR7977
63.5 2847
64.0 2884
64.5 2940
65.0 2958
these were just single shot readings.
some AK clowns showed up and I didn’t want to be around them any longer.
absolutely no pressure signs at all.
I’m going to investigate the 64 grains of H1000 load more closely.
H1000
Adg brass.
180 eldm’s @2.95 it cci#200’s
63.5 2895 sd 10
64.0 2908 sd 5
64.5 2935 sd 11
All three shot within 5/8 with 5 shots.
IMR7977
63.5 2847
64.0 2884
64.5 2940
65.0 2958
these were just single shot readings.
some AK clowns showed up and I didn’t want to be around them any longer.
absolutely no pressure signs at all.
I’m going to investigate the 64 grains of H1000 load more closely.
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Rem 700 S/A
McMillian A3
Burris Eliminator 3
Rem Brass
CCi-BR2
175 gr Eld-X(.oo5 off lands)
64.5 gr H-1000( pretty close to max @ 65.2 I had sticky extraction and tight bolt lift and primer pocket was loose)
24" Krieger 1 in 9.5"
2940-2957
Using Strelok Pro I was able to program perfect drop for Burris. Score 3 for 3 shots on gong @ 608 yards.
I hope they release an Eliminator in higher quality glass.
These really aren't target scopes and at 600 yards I find the stadia thick...so liking this group size.
3.9" @ 617 yards.
McMillian A3
Burris Eliminator 3
Rem Brass
CCi-BR2
175 gr Eld-X(.oo5 off lands)
64.5 gr H-1000( pretty close to max @ 65.2 I had sticky extraction and tight bolt lift and primer pocket was loose)
24" Krieger 1 in 9.5"
2940-2957
Using Strelok Pro I was able to program perfect drop for Burris. Score 3 for 3 shots on gong @ 608 yards.
I hope they release an Eliminator in higher quality glass.
These really aren't target scopes and at 600 yards I find the stadia thick...so liking this group size.
3.9" @ 617 yards.
Hey can anyone with Quickload run numbers for H1000 and 175 Eld-X and 180 Berger?
I noticed some of my brass at 64.5 load had some faint "smileys".
This was virgin Rem brass full length sized brass.
I am going to bump the should back and size neck with Lee Collett.
Going to back off a full grain and work up to 64.5. after 1st firing.
Primer pockets on 64.5 gr load seem just as tight as factory case.
Loads at 65 and above had stuff bolt lift and pockets were noticable loose.
I noticed some of my brass at 64.5 load had some faint "smileys".
This was virgin Rem brass full length sized brass.
I am going to bump the should back and size neck with Lee Collett.
Going to back off a full grain and work up to 64.5. after 1st firing.
Primer pockets on 64.5 gr load seem just as tight as factory case.
Loads at 65 and above had stuff bolt lift and pockets were noticable loose.
yes.
barrel sped up a lot so now to get 2900 with 180’s load is now not compressed. It just barely pushes on powder which I think is perfect.
2900ish with H1000 and 7977 really shoots well with low SD so I’m staying there.
I did get to a bit below 3000 before I had pressure starting to show.
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I got to 64.5 of H1000 loaded long.
No way I’d get it in at mag length.
Velocity was 2940 but that was well before the barrel sped up so it would be 3000ish now.
I have 700 S/A throated for 180 Berger.
Seekins WSM bottom metal allows to seat bullets out to lands and still function in magazine.
I actually found 175 gr ELDx load because I wasn't happy with feeding of Berger VLDs.
Eld-X feeds perfect except for last round.
