IMR Load for 8mm Mauser

[Timberline]

I own a mint condition 8mm Mauser (.323). I have seen references to a Nosler load for a 200 grain Partition with 52 grains of IMR4350 at a mv of 2698 fps on the internet. That is the fastest load I have seen listed for a 200 grain bullet in 8mm mauser. Is that info correct?

That load is not listed in the reloading section of this site.

 

[TBASTIAN]

Nosler's new Reloading Guide No. 6 shows the following for IMR 4350. Hope this helps!

8mm Mauser
200 Grain Partition or AccuBond
IMR 4350

52.0* grains - 2,698 FPS
50.0 grains - 2,583 FPS
48.0 grains - 2,468 FPS

 

[Timberline]

Thanks for the confirmation and the quick response!

 

[JD338]

Nosler's new Reloading Guide No. 6 shows the following for IMR 4350. Hope this helps!

8mm Mauser
200 Grain Partition or AccuBond
IMR 4350

52.0* grains - 2,698 FPS
50.0 grains - 2,583 FPS
48.0 grains - 2,468 FPS

That is one potent load! Should be a dandy for NA game.

JD338

 

[FOTIS]

I own a mint condition 8mm Mauser (.323). I have seen references to a Nosler load for a 200 grain Partition with 52 grains of IMR4350 at a mv of 2698 fps on the internet. That is the fastest load I have seen listed for a 200 grain bullet in 8mm mauser. Is that info correct?

That load is not listed in the reloading section of this site.

Cartridge : 8 x 57 mm Mauser (SAAMI)
Bullet : .323, 200, Nosler PART SP 35277
Cartridge O.A.L. L6: 3.250 inch or 82.55 mm
Barrel Length : 22.0 inch or 558.8 mm
Powder : IMR 4350

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-20.0 81 41.60 1911 1621 24074 6372 77.0 1.648
-18.0 83 42.64 1958 1703 25549 6616 78.4 1.607
-16.0 85 43.68 2006 1788 27116 6860 79.8 1.567
-14.0 87 44.72 2055 1875 28781 7102 81.1 1.528
-12.0 89 45.76 2103 1964 30550 7343 82.4 1.489 ! Near Maximum !
-10.0 91 46.80 2152 2057 32431 7582 83.6 1.452 ! Near Maximum !
-08.0 93 47.84 2201 2152 34432 7818 84.9 1.416 !DANGEROUS LOAD-DO NOT USE!
-06.0 95 48.88 2251 2250 36562 8051 86.1 1.380 !DANGEROUS LOAD-DO NOT USE!
-04.0 97 49.92 2301 2351 38831 8279 87.2 1.342 !DANGEROUS LOAD-DO NOT USE!
-02.0 99 50.96 2351 2454 41248 8504 88.3 1.304 !DANGEROUS LOAD-DO NOT USE!
+00.0 101 52.00 2401 2560 43829 8723 89.4 1.268 !DANGEROUS LOAD-DO NOT USE!
+02.0 103 53.04 2452 2669 46579 8936 90.5 1.233 !DANGEROUS LOAD-DO NOT USE!
+04.0 105 54.08 2502 2781 49523 9143 91.4 1.199 !DANGEROUS LOAD-DO NOT USE!
+06.0 107 55.12 2553 2895 52670 9342 92.4 1.166 !DANGEROUS LOAD-DO NOT USE!
+08.0 109 56.16 2604 3012 56031 9533 93.3 1.134 !DANGEROUS LOAD-DO NOT USE!
+10.0 111 57.20 2656 3132 59653 9716 94.1 1.103 !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 101 52.00 2544 2875 52326 9109 95.7 1.173 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 101 52.00 2230 2208 36105 8003 80.4 1.384 !DANGEROUS LOAD-DO NOT USE!

 

[honkeetonkin]

Always thought the 8X57 would be potent in an encore pistol, but still having fun with the 204 , maybe someday.

 

[JD338]

Always thought the 8X57 would be potent in an encore pistol, but still having fun with the 204 , maybe someday.

You bet! That would be a thumper in an Encore. :grin:

JD338

 

[Timberline]

Thanks for the warning Pop! I know the US (SAAMI) lists the max pressure at around 35,000 P.S.I. due to the .318 rifles out there. I have a Remington Classic.

Accurate Powders uses European specs in their data and they say a newer .323 rifle can be loaded 58,200 P.S.I. So I should be ok looking at your data, but your velocity in the table is curiously lower for some reason.

Here is Accurate's explaination below:

"Because of shooter requests for 8x57mm Mauser loads that are the equivalent of ammunition currently loaded in Europe, the Accurate technical staff has developed the following data.

The European pressure limit for the 8x57mm is approximately 97% of the loading limit for the .30-06. This equates to a working pressure limit of about 58,200 P.S.I. The performance of the 8mm Mauser is excellent when loaded to its full potential. This data should only be used
in rifles that have been determined to be safe by a competent gunsmith and that are known to have “JS” bore dimensions (.323" groove diameter)."

 

[FOTIS]

If you have a rem classic then I would use the 30-06 max. Seems fair. Pending on powder it will do 2700 with the 200 grain bullet.

So what ever the 30-06 will do with a 180 the 8mil will do with a 200.....more or less.

Here you go but use at own risk.



Cartridge : 8 x 57 mm Mauser (SAAMI)
Bullet : .323, 200, Nosler PART SP 35277
Cartridge O.A.L. L6: 3.250 inch or 82.55 mm
Barrel Length : 24.0 inch or 609.6 mm
Powder : IMR 4350

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-20.0 88 45.44 2137 2028 29995 6648 83.2 1.580
-18.0 91 46.58 2191 2132 32016 6881 84.5 1.537
-16.0 93 47.71 2245 2238 34179 7109 85.8 1.495
-14.0 95 48.85 2300 2348 36494 7334 87.1 1.454
-12.0 97 49.98 2354 2462 38975 7554 88.3 1.411
-10.0 100 51.12 2409 2578 41633 7768 89.5 1.369
-08.0 102 52.26 2465 2698 44484 7976 90.6 1.328
-06.0 104 53.39 2520 2820 47555 8177 91.7 1.288
-04.0 106 54.53 2576 2946 50854 8370 92.7 1.250 ! Near Maximum !
-02.0 108 55.66 2632 3076 54404 8554 93.7 1.213 ! Near Maximum !
+00.0 111 56.80 2688 3208 58233 8729 94.6 1.178 !DANGEROUS LOAD-DO NOT USE!
+02.0 113 57.94 2744 3343 62358 8894 95.4 1.143 !DANGEROUS LOAD-DO NOT USE!
+04.0 115 59.07 2800 3482 66790 9047 96.2 1.110 !DANGEROUS LOAD-DO NOT USE!
+06.0 117 60.21 2857 3624 71580 9189 96.9 1.077 !DANGEROUS LOAD-DO NOT USE!
+08.0 119 61.34 2913 3769 76769 9317 97.5 1.046 !DANGEROUS LOAD-DO NOT USE!
+10.0 122 62.48 2970 3917 82403 9433 98.1 1.016 !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 111 56.80 2826 3546 69480 8824 98.9 1.094 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 111 56.80 2513 2804 47648 8252 86.9 1.285

 

[Timberline]

Thanks POP. I will approach the top end slowly.

If you are still out there, could you run one more load through your program? I am interested in seeing where this powder will max out (58,200 psi):

Powder : IMR 4064
Grains: 46
Velocity: 2638 fps
Cartridge : 8 x 57 mm Mauser (SAAMI)
Bullet : .323, 200, Nosler PART SP 35277
Cartridge O.A.L. L6: 3.250 inch or 82.55 mm
Barrel Length : 24.0 inch or 609.6 mm

Thanks for your help.

 

[Guest]

I've got the same rifle - 8x57 Remington 700 Classic - and I'm getting in the 2725-2750fps range with 185gr, but they're flat base, and have a fairly long bearing surface. If you contact Western Powders, the ballistician there will give you data from Accurate and Ramshot. So far, he is right on the money with what he says they will do. I think the Nosler #5 lists 2698fps or so with one load for the 200gr Partition, but I'm not looking at the book, and can't remember which powder. Funny thing is, it's actually higher (velocity) than the fastest max load with the 180gr BT! I'm still playing with my 8x57, but I have found a couple of loads that shoot close to 1", and so I'm hunting with those. I found a load that will put three into .5", but it is dismally slow (2418fps average), so I forego that in favor of a little more reach. If you find something that's going 2700 with a 200gr, please post your results, as I'm about to start into a box of 200gr after deer season is over.

 

[Timberline]

Sure Dubyam. I will let you know what I find. That IMR 4064 load may be a possibility, depending on pressures.

Thanks for the info.

 

[FOTIS]

Thanks POP. I will approach the top end slowly.

If you are still out there, could you run one more load through your program? I am interested in seeing where this powder will max out (58,200 psi):

Powder : IMR 4064
Grains: 46
Velocity: 2638 fps
Cartridge : 8 x 57 mm Mauser (SAAMI)
Bullet : .323, 200, Nosler PART SP 35277
Cartridge O.A.L. L6: 3.250 inch or 82.55 mm
Barrel Length : 24.0 inch or 609.6 mm

Thanks for your help.

Cartridge : 8 x 57 mm Mauser (SAAMI)
Bullet : .323, 200, Nosler AccuBond 54374
Cartridge O.A.L. L6: 3.250 inch or 82.55 mm
Barrel Length : 24.0 inch or 609.6 mm
Powder : IMR 4064

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% of nominal charge.
CAUTION: Figures exceed maximum and minimum recommended loads !

Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time
% % Grains fps ft.lbs psi psi % ms

-20.0 76 36.80 2041 1850 27923 5791 91.5 1.642
-18.0 78 37.72 2087 1935 29584 5962 92.5 1.604
-16.0 80 38.64 2133 2021 31339 6129 93.4 1.567
-14.0 82 39.56 2179 2109 33194 6291 94.3 1.531
-12.0 84 40.48 2225 2199 35154 6447 95.1 1.496
-10.0 86 41.40 2271 2291 37225 6598 95.9 1.462
-08.0 88 42.32 2317 2383 39412 6743 96.6 1.424
-06.0 90 43.24 2362 2478 41723 6880 97.2 1.388
-04.0 92 44.16 2407 2573 44165 7011 97.8 1.351
-02.0 94 45.08 2452 2670 46746 7135 98.3 1.317
+00.0 95 46.00 2497 2769 49475 7250 98.7 1.284 ! Near Maximum !
+02.0 97 46.92 2541 2868 52362 7358 99.1 1.252 ! Near Maximum !
+04.0 99 47.84 2586 2969 55417 7457 99.4 1.221 !DANGEROUS LOAD-DO NOT USE!
+06.0 101 48.76 2629 3070 58652 7547 99.6 1.191 !DANGEROUS LOAD-DO NOT USE!
+08.0 103 49.68 2673 3173 62079 7628 99.8 1.163 !DANGEROUS LOAD-DO NOT USE!
+10.0 105 50.60 2716 3277 65713 7699 99.9 1.135 !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 10% relative to nominal value:
+Ba 95 46.00 2596 2994 58074 7059 100.0 1.201 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 95 46.00 2361 2475 41108 7113 93.7 1.392

 

[Timberline]

Thanks POP.

If I am reading things correctly, and I use the advertised velocities and your pressures, it should look like this:

Grains Vel Density Press Comments
46.0 2638 89.0 49475 Near Maximum
46.5 2662 90.3 51900 Near Maximum
47.0 2686 91.5 52500 Near Maximum
47.5 2709 92.3 55100 Near Maximum
48.0 2733 93.0 55600 DANGEROUS
48.5 2757 93.7 58400 DANGEROUS

So on paper, there is a possibility of hitting 2709 fps with IMR4064, but it really pushing the pressure ceiling.

I do not want anyone getting hurt, so anyone with a military Mauser, please understand that these loads above may not be safe for those rifles.

 

[FOTIS]

Correct. Again only a prediction.

 

[Timberline]

Cartridge : 8 x 57 mm Mauser (SAAMI)
Bullet : .323, 200, Nosler PART SP 35277
Cartridge O.A.L. L6: 3.250 inch or 82.55 mm
Barrel Length : 22.0 inch or 558.8 mm
Powder : IMR 4350


The highest velocity I got for this load was 2665 fps. It was averaging around 2625 fps.

 

[Timberline]

I had some 196 grain bullets available, so I made up some loads with IMR 4064.

I was able to get 47.5 grains to average 2569 fps.

I tried 48 grains and got 2597 fps, but that was really pushing the pressure ceiling in my rifle. I would not recomend that load.

I have noticed that the load data for the 30-06 in 200 grain bullets is a pretty good indicator of what will happen with the 200 grain bullets in 8mm Mauser. The limiting factor is case capacity, so you will need to look at powders with a load density of roughly 85% or less. Of course, this all assumes you are shooting a .323 with strong action. Work up slowly.