7 SAUM. Please help

[Just4fun]

I have 4 custom 7 saums that’s I’m trying to load for and haven’t ever done load work for this caliber before.

I’m using the Berger 175 elite hunters
H4831sc
Fed 215m
Adg brass
24” proof carbon barrels

Smallest group I can get is about an inch give or take around 62ish grains about 2940fps
Right now.
And help would be awesome on speed nodes or a good coal to start with.
Thank you in advance

 

[Coyotefurharvester]

You are a couple grains, and 100 fps warmer than my 7saum H4831sc loads. I have had good luck seating Bergers 0.050-0.060 of the lands with hunting bullets. I start 20-25 thou off and move 25-30 thou jumps(similar to the Berger testing suggestions).

 

[Just4fun]

So you speed mode is around 2850ish??

 

[Lance21]

I run a 7 saum, 24 inch barrel. 190 hybrids. H1000. Adg brass. My node is 2885 fps. What brought it all together though was when I put the EC TUNER BRAKE on it. Dialed it in to around 3/8s of an inch. That brake is the easy button.

 

[whatwind?]

Less powda

 

[Ranger188]

Since you are running the elite hunter bullets, is this a hunting round?
And for what, and what distance?
What are the 4 going to be used for?

 

[rhovee]

With 24” saums on hunting rifles my nodes are almost always 2880-2900. 26” is about 2930 on my Bart. RL23 and 4831sc are very similar. I use 23, for 59.5 grains. 2925. 26” barrel. BR2’s. 180 hybrids .10 off.

 

[Just4fun]

These are going to be used for hunting 1000k
And under

 

[Just4fun]

They will be mainly for elk and deer

 

[SKWERLZ]

2950 with a 28” barrel and H4831 is a pretty happy place, you might want to load down a bit.

 

[Preacher]

Slow it down a little....

 

[Just4fun]

Yes it totally sounds like it’s going to fast.
I will slow it down a bit then I will have to find my seating depth after

 

[Just4fun]

I shot them today and slowed it way down into the high 27’s and still holding about 1” groups.
ES and SD’s are low on some charges but it’s like 1.4” groups according to the shot marker
At 100.

Will seating depth only get the group where I want it?

 

[SKWERLZ]

Seating depth can make a pretty big difference.

When I’m figuring out my powder charge I don’t even look at groups.

 

[Just4fun]

Do you pick your powder charge based on speed and low ES?
Then tune with seating depth?

 

[Coyotefurharvester]

I find a powder charge range(.4-.6 gr) where there is least amount of vertical dispersion. Like to see one bullet hole(dia) or less for hunting rifles at 100 yards. I usually run that test with about 0.025 jump in hunting rifles, since all loads will not ever touch the lands. Then test seating depth increasing jump.

 

[Willow]

Back your load off - the 7SAUM is very popular in Australia and most guys running them in F-open with 30-32" barrels are running them around 2940fps. One of the most accurate SAUMs I've seen shoot runs at 2880fps, and that particular rifle holds the X ring at 1000 yards comfortably. You're using the right powder, just back it off a bit and look for the group to shrink.

 

[Willow]

Do you pick your powder charge based on speed and low ES?
Then tune with seating depth?

This is how I do it - get your powder charge right, then test seating depth, once you're happy with both, then tweak the tuner (if you have one).

 

[SKWERLZ]

Do you pick your powder charge based on speed and low ES?
Then tune with seating dept

Yes
Get the speed and ES you want, tune with jump or jam if that’s acceptable for you then monkey with the tuner if you have one.

 

[Coyotefurharvester]

I don't think he wants to carry a tuner around the mountains, hunting.