7mmRSAUM with Berger 180 hybrid

[BIGMAC]

Will start load work-up with my 7RSAUM has a .315 neck and 200fb.(. 1000 yds. BR)
What powder would you start with.
Have on hand H4350,H4831sc,IMR7828ssc,RL25 and H1000. Thanks for any info.

 

[trailrider121]

Will start load work-up with my 7RSAUM has a .315 neck and 200fb.(. 1000 yds. BR)
What powder would you start with.
Have on hand H4350,H4831sc,IMR7828ssc,RL25 and H1000. Thanks for any info.

I would start with H1000. High node around 65-65.5 grains. I currently use a full case of retumbo @66 grains with 180 hybrid. Must use a drop tube.

 

[RonAKA]

Of what you have, go with H1000. If you are buying, then Retumbo would be worth a pound to try.

 

[Medium rare]

H1000 works great with 195s also

 

[BIGMAC]

H1000 works great with 195s also

Will .200 fb work with the Berger 195's

 

[Medium rare]

I am not sure about the freebore on mine. Speedy is the one that chambered it and I believe his reamer is setup for the 180s. I use it for deer hunting and tried the 195s and they shot groups under 1/2" at 300 yards at 2900fps. When I get home I can measure them. I am running them 10thou jump.

 

[mac86951]

4831sc; good powder for 180s. 24" barrel

 

[nakneker]

H4831sc

 

[280man]

H4350 if your shooting Fclass. Hands down the best powder for our sport in the RSAUMs and 284s

 

[MTlager]

Will .200 fb work with the Berger 195's

Yes, it will.

 

[BOB LEE SWAGGER]

H4350 if your shooting Fclass. Hands down the best powder for our sport in the RSAUMs and 284s

For YOUR set-up. H4831sc & N165 for mine.

 

[BIGMAC]

Yes, it will.

Thanks

 

[Dubbo]

For YOUR set-up. H4831sc & N165 for mine.

How temperature sensitive is N165 in your experience?

 

[280man]

For YOUR set-up. H4831sc & N165 for mine.

I'm not the only one on the team shooting it

 

[Tahoe Shark]

I'm not the only one on the team shooting it

What kind of velocity are you getting with H4350 and 180 Hyb in the 7 RSAUM? I am using 4831 sc now but I am going to try H4350. Where did you start seeing pressure signs?

 

[280man]

What kind of velocity are you getting with H4350 and 180 Hyb in the 7 RSAUM? I am using 4831 sc now but I am going to try H4350. Where did you start seeing pressure signs?

I had great accuracy with my RSAUM at around 2925 FPS. You can push them harder but your brass won't live.

 

[Walkabout]

Hi Guys
I'm from the UK, building up a 7mm SAUM.
I was thinking of either a 24" barrel or a 28" barrel.
I will be using Berger 180 Hybrids.
Reading what you guys are saying, am I right in thinking H4831sc fo a 24" barrel but a different powder if I went for a longer barrel say 28"?

 

[RonAKA]

Reading what you guys are saying, am I right in thinking H4831sc fo a 24" barrel but a different powder if I went for a longer barrel say 28"?

My view is that you can't make up for a short barrel with powder type. The best velocity load in a 28" will also be your best velocity load in a 24". The QuickLoad users can confirm or deny that claim...

 

[moondog]

I have 2-7SAUM's one on a short action,one on a long. 180 berger's, -.020" in the long w/62.2 h1000
gives me 2950 -with single digits. 62.7 4831sc w/162 class projectiles in the short @2995

 

[dragman]

Mine reamer was very close to yours. Mine liked MRP and RL22 both really well. I was shooting the 180's around 3050fps and very happy with them and the performance.