Thanks to AR posts for the load - I've not used this powder before, but am pleased with the results.

Three-shot groups with 4 different powder charges and the 160gr Partition - not exactly a bullet known for bench-rest accuracy, but shooting like this, who am I to complain?

And the powder charges were.....?
Peter.

These were 44-47gr... in a new action.

Nice. Very efficient cartridge. Come on now don't hold back. Tell us about your new action. Really, we're interested.

Thanks,
KB

Nice shooting!

You are right: the Partition isn't generally known for match-grade accuracy. Like you, though, I have had excellent results both on paper and in the field with the Partitions -- particularly the 6.5mm, 125 grain version as of late.

In a fireforming load for the 6.5mm Bullberry Improved in a 26" MGM Contender barrel, I am getting sub-0.5 MOA -- and this is from Nosler SECONDS...not to mention a Partition...

It's a rifle I had built for myself on a titanium mauser, octagon barrel and MPI stock (for the time being.)

Here's a pic of the WIP. Weight is 7lbs as shown.

Magnificent rifle!!!!
And, H-414 is my go to powder for the 7x57. My sons and I have 7x57's and they are all fed with H-414 powder. 48 grains with 140 Nosler partitions shoot very well in each rifle.

Don

Nice rifle! Double square bridge, titanium action, octagon barrel and synthetic stock. Should be visually jarring but it works nicely.

H414 / W760 is all I use in my 7x57 too.

Nice rifle! I like H414 or WW 760 for the 7X57mm for bullets up to 150 grains. I have not tried it with 160's. Back when I used 160-grain bullets a lot in the 7X57mm, I used IMR 4350. But that powder performs similarly to H414, it just doesn't meter as well in a powder measure........

Thanks! I am actually using 40 grains of H414 with the 160 grain NPs in my 7x57R. Nice mild load, with acceptable but not outstanding accuracy. I might move up a bit in powder and see what happens. I might also work up to your loads in my 7x57.
Peter.

Peter - good luck... take it slowly and use your chronograph.

quote:

Originally posted by new_guy:
It's a rifle I had built for myself on a titanium mauser, octagon barrel and MPI stock (for the time being.)

Weight is 7lbs as shown.

WOW, that's stunning. I had no idea that such a rifle could be built.

Titanium mauser ??? Where can one get such an action? I looks like the receiver is Titanium, and the extractor maybe, but the bolt and shroud, cocking piece look steel. I can't tell about the bottom metal. What kind of trigger is that? Blackburn?

Please tell me more, here in open discussion or by PM.

EDITED:
OK, I couldn't wait, so I googled this. Now I understand.

SATTERLEE ARMS
21593 Pahkamaa Road
Deadwood, SD 57732

Stuart Satterlee.
Titanium Intermediate Length Action
Pricing: $6500.00

OK, that makes sense.

I'll read what's said here: http://www.satterleearms.com/intermediate.htm



WOW again.

KB

KB - They are pretty cool. The only parts that are steel on the action are:

> the plunger and spring for the safety shroud
> the magazine spring
> the spring inside the trigger bow for the floorplate release

Everything else (including the extractor collar) is Titaium.

The trigger is Blackburn, the rings are Talley, and the barrel is a HEYM factory contour.

The actions aren't cheap, but they are VERY unique. They provide a lightweight mauser without that "swiss-cheese" look that most steel receivers have to get them to this sort of weight.

I have wanted on for years and finally sold off enough other less desirable stuff to make this one a reality.

New_guy I tried your loads for the 160 NP and H414 today in my CZ full stock. I think I found a winner! Have to confirm with a 5 shot group.
Thanks, Peter

Excellent.

What was the velocity per charge of powder?

I did not chrono the loads as they were within the "book) which as I recollect was 42-46 grains (or something like that) for the 7x57. For the 7x57R I was already shooting 40 grains and so I just tried 41 and 42 grains figuring they were safe for the rimmed round. When I go back and confirm, I will chrono. The range was rather busy and setting up a chrono is a pain in the behind (trying to align the target, rifle and chrono) especially as the range is "formal" ie. not touching the gun while the line is cold.
Peter.

Very Very Nice Looking Rifle and Looks like a good load.

FYI - I chronographed three of these loads with the 160gr partitions.

45gr 414 = 2500 avg
46gr 414 = 2550 avg
47gr 414 = 2600 avg

quote:

Originally posted by new_guy:
FYI - I chronographed three of these loads with the 160gr partitions.

45gr 414 = 2500 avg
46gr 414 = 2550 avg
47gr 414 = 2600 avg

With such performance, it seems to me that dropping the charge of H414 to 40 grains would result in a MV not much over 2200 FPS. This would put the performance of the 7X57mm in the .30/30 class. I prefer my 160's to go somewhere between 2700-2800 FPS MV from the 7X57mm.

Primers started getting pretty flat at 48gr... what powder are you using to get 2800 with 160s?

47 grains of H414 with the 160 NP chronos at 2606 (SD=10.24) average out of my CZ (full stock) in 7x57. My accuracy load for my 7x57R is 41 grains H414 and the 160 NP.
Peter

You can use about 50 H414 with a 160 Partition for 2780 fps. Pressure trace says 64000 psi, and these are only in Win. brass in a long-throated rifle. If you are only going 2600, you can definitely step on it and get the velocity up safely.

All I have used for the last probably 20, and maybe 30 years ??????? in my long throated 7x57s has been H414 and I use more than 50 grs. with a 160 gr. bullet and I get about 13 to 14 loading with 4 or 5 trims along the way..

MY throat is very long indeed inasmuch as I can seat a 175 gr. hornady .284 into the neck and my box is slightly modified in length..My 7x57s are the 7x57 IMP for all practical purposes and will beat the sox off a factory .280 Rem and most handloads..Of course you could do the same thing with the .280 and scare a 7 mag to death!

never tried 414 in a 7x57. i shoot 51.4 grains of RL 22 with a 175 grain hornady round nose. it does well. ruger no. 1 with a looooong throat. the loaded cartridge looks like a piece of office equipment. best 3 shot group is 0.60" and it will do it with consistency. downside is horrible carbon fouling. i just love that round with the 175s.

/

By long throat, I suspect Ray is referring to the CIP chamber with its free-bore. Chambered here in the states, they typically have no free-bore. Comparatively speaking, the CIP chamber would be "long-throated."

Anyway, I had a chance to shoot it today at a friend's range.

Here are 3 shots at his 350-yard steel target with the 160 Nosler Partitions.

/

Update.
I just took a new 7x57 out to test some loads using H-414, and I had to stop testing at 47 grains of powder with 140 grain Nosler Partitions. The primers were flattening at 48 grains, so I won't be using that much powder in this rifle.

What would you all say is max for a 7 x 57R with 175 grs Hornady RN IL´s?

H 414 or other powders?

Thanks in advance, Hermann