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#12255996 - 09/07/17 Powders for 7x57 Mauser  
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tzone Online content
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First, thanks to all that have helped so far on all my reloading questions!

Next, what powders should I be looking at for loading my Mauser? I have IMR 4350 and understand it may be temp sensitive. I also have Varget on hand. From what I'm reading on here and in articles, this may not be the best for the 7x57?

It looks like W760 should be on my short list.

What others and why?

Thanks again.

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#12256045 - 09/07/17 Re: Powders for 7x57 Mauser [Re: tzone]  
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H4350, Ramshot Big Game and RL17 are worth considering especially with 140gn & 150gn bullets

#12256118 - 09/07/17 Re: Powders for 7x57 Mauser [Re: tzone]  
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Add IMR4451 to that list.


John

"Gunwriters, as you know, aren't as informed as their readers are and if it wasn't for the readers, there would be no need for writers..."--Shrapnel, May 2015
#12256122 - 09/07/17 Re: Powders for 7x57 Mauser [Re: tzone]  
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If temp sensitivity is an issue then skip the W760/H414.

#12256129 - 09/07/17 Re: Powders for 7x57 Mauser [Re: tzone]  
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The 7x57 is at a case capacity to bore size ratio where the optimum class of powders will shift with bullet weight.

#12256192 - 09/07/17 Re: Powders for 7x57 Mauser [Re: mathman]  
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Originally Posted by mathman
If temp sensitivity is an issue then skip the W760/H414.


Well, I'm not positive it is. I've just been loading with imr 4350 because that's what I have. And almost all the reloading data shows it in their manuals. That's the reason I got it to start with.

#12256193 - 09/07/17 Re: Powders for 7x57 Mauser [Re: Mule Deer]  
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Originally Posted by Mule Deer
Add IMR4451 to that list.


Sounds good. Any particular reason or you've just had good results?

#12256197 - 09/07/17 Re: Powders for 7x57 Mauser [Re: dingo]  
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Originally Posted by dingo


H4350, Ramshot Big Game and RL17 are worth considering especially with 140gn & 150gn bullets


It seems to like 139/140gr pretty well so far.

#12256286 - 09/07/17 Re: Powders for 7x57 Mauser [Re: tzone]  
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IMR4451 and H4350 are temperature insensitive powders suitable for IMR4350 friendly applications. Both go through a powder measure better than the IMR version.

#12256299 - 09/07/17 Re: Powders for 7x57 Mauser [Re: tzone]  
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How about RL19? I see that listed quite often as well.

#12256327 - 09/07/17 Re: Powders for 7x57 Mauser [Re: tzone]  
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Bad temp sensitivity reputation.

#12256348 - 09/07/17 Re: Powders for 7x57 Mauser [Re: mathman]  
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Originally Posted by mathman
IMR4451 and H4350 are temperature insensitive powders suitable for IMR4350 friendly applications. Both go through a powder measure better than the IMR version.


Any non-industry tests on IMR4451 that show it is in fact temperature insensitive?


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#12256360 - 09/07/17 Re: Powders for 7x57 Mauser [Re: roundoak]  
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I don't have any tests. Is the claim suspect?

#12256401 - 09/07/17 Re: Powders for 7x57 Mauser [Re: tzone]  
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If your google fu is strong you can find a couple on the web comparing the two. Those I have read indicate that 4451 is not as insensitive as H4350, but not too far off and certainly better than, say, IMR4350. BUT those I have read are flawed in that they only chill the ammunition, not the rifle.


Tzone, as I mentioned in the other thread, try H4831 with heavy bullets.


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Some of it's tragic,
But I had a good life all the way."
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#12256415 - 09/07/17 Re: Powders for 7x57 Mauser [Re: mathman]  
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Originally Posted by mathman
The 7x57 is at a case capacity to bore size ratio where the optimum class of powders will shift with bullet weight.



I had to read that twice,but it's true,I think. grin

#12256417 - 09/07/17 Re: Powders for 7x57 Mauser [Re: tzone]  
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I won't use Winchester powders in general -- bad temp sensitivity. Exception for me is 296 AKA H110 -- I use in 44 mag.

IMR4350 is less temp sensitive than 760, I believe. H4350 is probably better yet. IMR4451 is also good.


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#12256431 - 09/07/17 Re: Powders for 7x57 Mauser [Re: tzone]  
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Thanks guys! I really appreciate it!

#12256445 - 09/07/17 Re: Powders for 7x57 Mauser [Re: ruraldoc]  
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Originally Posted by ruraldoc
Originally Posted by mathman
The 7x57 is at a case capacity to bore size ratio where the optimum class of powders will shift with bullet weight.



I had to read that twice,but it's true,I think. grin


For example, you'll see a bigger shift in optimum powder moving from 120 to 175 grain bullets in 7x57 than you will moving from 125 to 180 grain bullets in 308 Winchester.

#12256517 - 09/07/17 Re: Powders for 7x57 Mauser [Re: tzone]  
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I've had good success with 140 to 150 gr bullets and a case full of R19. Never did any serious testing for temperature sensitivity, but shot deer, antelope and elk under all sorts of conditions with no problems. Had a great 120 gr load with IMR 4007, alas it is gone. My 2 rifles are not very sensitive and shoot well with a variety of powders. H4350 is tough to beat for an all around powder. H4831 is also useful.

#12256540 - 09/07/17 Re: Powders for 7x57 Mauser [Re: mathman]  
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Originally Posted by mathman
I don't have any tests. Is the claim suspect?


Just skeptical of manufacture advertising hype. Would like to see hard data.

I purchased 4451 to try in my 7x57s because ran out of my H4350 supply. It did not approach the accuracy of H4350 in three bullet weights, 140 150 and 160. IMR 4350 was better with 140 and 150 grs but not as good with 160 gr.


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#12256551 - 09/07/17 Re: Powders for 7x57 Mauser [Re: tzone]  
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I haven't messed around much with Big Game yet, but Hunter seems to perform well with 160- and 175-gr bullets. I expect it will do well with 154-grain Interlocks as well, which I plan to test once Hurricane Irma gets through with us. As for temp sensitivity, most of my shooting is in temps in the upper 80s and low 90s, down to maybe the mid 40s. Someone else can speak to this, but I don't think that's enough of a spread to matter much.


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#12259577 - 09/08/17 Re: Powders for 7x57 Mauser [Re: tzone]  
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RevMike

What is the loading range (start/max) for 160-175 bullets with Hunter?


Ed

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#12260101 - 09/09/17 Re: Powders for 7x57 Mauser [Re: Prwlr]  
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Originally Posted by Prwlr
RevMike

What is the loading range (start/max) for 160-175 bullets with Hunter?


Good morning from breezy Florida.

I posted this a while back on the "Good 7x57 Loads" thread, but below is Ramshot data for both Big Game and Hunter. At this point I haven't done much of anything with 154-grain bullets - I'll get around to it - but the 160s at an estimated 2550-2600 fps, and the 175s at about 2350-2400 shoot very well in both my Montana ASR and M98. These velocities are estimates since I haven't run them through a chronograph yet - I'm waiting for a bit of cooler weather - but they ought to be close in 24 inch barrels. The 160s are Speer Deep Curl (n.b. I use the Deep Curl data on Speer's site just to be on the safe side), Grand Slams, and Partitions. The 175s are Deep Curl and Grand Slam. All shoot right around an inch at 100 yards off the bench. They might do better, but the reticles on the scopes are German 4s, and both are thick enough to cover a one inch target dot at 100 yards. So I'm not getting "target precision" even if I was good enough. But it's good enough for my hunting purposes. Once the 175s are gone, I don't expect to replace them, and will probably stick with the 160s and 154s at about 2600. Again, most of my shooting is at game, so those bullets at those velocities should do anything I need them too. Our deer aren't very big, and even though I've taken some really big porkers, most of the ones I shoot are table size - way less than 100 pounds - all generally within 75 yards, and all either CNS shots or not shot at all.

Anyway, that's all reaching around my butt to scratch my elbow. Here's the data I think you're looking for.

Originally Posted by RevMike
I ran across this last night. I looks as if Ramshot is providing some updated/modern reloading data.

-------------------------

Since we do not have any specific lab tested data on this caliber, we can provide you with some guideline, based on calculations and information from other sources.

Caliber: 7x57 Mauser.
Barrel length: 24”
Pressure spec: <56565 Psi/3900 Bar (CIP) original


Powder: Ramshot – BIG GAME®. (1st Choice)

Bullet weight: 100-110 grains.
Start load: 47.7 grains (2975 - 3075 Fps)
Maximum load: 53.0 grains (3275 – 3375 Fps).

Bullet weight: 120 grains.
Start load: 45.0 grains (2700 - 2800 Fps)
Maximum load: 50.0 grains (3000 – 3100 Fps).

Bullet weight: 130 grains.
Start load: 43.7 grains (2575 - 2675 Fps)
Maximum load: 48.5 grains (2875 – 2975 Fps).

Bullet weight: 139/140 grains.
Start load: 42.0 grains (ca 2550 Fps)
Maximum load: 47.0 grains (ca 2900 Fps).

Bullet weight: 150-154 grains.
Start load: 40.8 grains (ca 2450 Fps)
Maximum load: 46.0 grains (ca 2800 Fps).

Bullet weight: 160 grains.
Start load: 40.5 grains (2350 – 2450 Fps)
Maximum load: 45.0 grains (2600 – 2700 Fps).

Bullet weight: 175 grains.
Start load: 39.6 grains (2300 – 2400 Fps)
Maximum load: 44.0 grains (2500 – 2600 Fps).


Powder: Ramshot – HUNTER®.

Bullet weight: 120 grains.
Start load: 48.6 grains (ca 2780 Fps).
Maximum load: 54.0 grains (ca 3140 Fps). LD ca 106%

Bullet weight: 140 grains.
Start load: 46.8 grains (ca 2600 Fps)
Maximum load: 52.0 grains (ca 2950 Fps). LD ca 102%

Bullet weight: 150-154 grains.
Start load: 43.7 grains (ca 2450 Fps)
Maximum load: 49.5 grains (ca 2750 Fps).

Bullet weight: 160 grains.
Start load: 43.7 grains (ca 2375 Fps)
Maximum load: 48.50 grains (ca 2675 Fps).

Bullet weight: 175 grains
Start load: 42.0 grains (ca 2300 Fps)
Maximum load: 47.0 grains (ca 2650 Fps).LD ca 99%


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#12260324 - 09/09/17 Re: Powders for 7x57 Mauser [Re: tzone]  
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IMO, H4350 is where to start with the 7x57, and especially with the 140-150gr bullets. When it comes to temperature sensitivity and IMR 4350 (and actually most powders), I usually ignore that notion. As long as you develop a load that's safe in the summer, it will be fine in the winter. And, it will hunt just fine too. In my personal 30/06, I use IMR 4350 with 165s. I try to avoid shooting in the middle of the summer, but even early fall where I shoot it's often over 90 degrees in the morning. Last buck I shot with that load was on a 16 degree morning, and at 200 yards that bullet landed exactly where I intended. Your mileage may vary, but I doubt it. Getting back to the 7x57, if 4350 doesn't work in your rifle, W760 with something in the 150-160gr class of bullets works well. If you are a max load type of shooter, I FOR SURE would develop a load in the heat of the summer with that powder. It will be safe in the winter, but not always the other way around.

One more note about the 7x57 - don't ignore the "in-between" bullets. People tend to shoot 140gr or 160gr in 7mm, and sometimes 150gr. I had a finicky 7x57 that shot all those bullets decently, but dropping a 145gr Speer produced clover leafs. Same with the 154gr Hornday - not quite clover leafs, but more consistent that the 150 below and 160 above. Good luck!

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