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#12255996 - 09/07/17 Powders for 7x57 Mauser  
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tzone Offline
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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.

CMG 300 BP

#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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Mule Deer Online content
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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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mathman Online content
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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.

Alpha

#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.

Bravo

#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?


You're Welcome At My Fire Anytime



#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."
(Jimmy Buffet)

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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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tzone Offline
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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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