Norma MRP

[gerry]

At one time I compared MRP to RL 22 and they were a different color for whatever that's worth. At that time people were saying the same thing about the two but I could never quite duplicate the results of MRP with RL 22.

 

[Guest]

How would MRP do in the 300 RUM with 200 AB?

Don

 

[truck driver]

This has turned into a great debate anyone have some loads for 200gr. bullets they would like to share and compare?

 

[bullet]

I have no idea

 

[DrMike]

Cartridge : .300 Rem Ultra Mag
Bullet : .308, 200, Nosler AccuBond 54618
Useable Case Capaci: 98.799 grain H2O = 6.415 cm³
Cartridge O.A.L. L6: 3.598 inch = 91.39 mm
Barrel Length : 26.0 inch = 660.4 mm
Powder : Norma MRP

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 72 68.00 2455 2677 33843 10656 98.3 1.756
-18.0 73 69.70 2512 2802 36138 10888 98.9 1.715
-16.0 75 71.40 2568 2928 38572 11098 99.4 1.665
-14.0 77 73.10 2623 3056 41151 11285 99.8 1.615
-12.0 79 74.80 2678 3185 43885 11447 99.9 1.567
-10.0 80 76.50 2732 3315 46781 11584 100.0 1.521
-08.0 82 78.20 2786 3446 49849 11709 100.0 1.477
-06.0 84 79.90 2838 3577 53099 11832 100.0 1.435
-04.0 86 81.60 2890 3708 56542 11952 100.0 1.395 ! Near Maximum !
-02.0 88 83.30 2941 3841 60190 12068 100.0 1.356 ! Near Maximum !
+00.0 89 85.00 2991 3973 64057 12182 100.0 1.318 ! Near Maximum !
+02.0 91 86.70 3041 4107 68157 12293 100.0 1.282 !DANGEROUS LOAD-DO NOT USE!
+04.0 93 88.40 3091 4242 72506 12400 100.0 1.248 !DANGEROUS LOAD-DO NOT USE!
+06.0 95 90.10 3139 4377 77121 12504 100.0 1.214 !DANGEROUS LOAD-DO NOT USE!
+08.0 97 91.80 3188 4514 82022 12605 100.0 1.182 !DANGEROUS LOAD-DO NOT USE!
+10.0 98 93.50 3236 4651 87229 12702 100.0 1.151 !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 89 85.00 3086 4229 76280 11822 100.0 1.224 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 89 85.00 2848 3601 51753 12672 99.8 1.446

There are better powders, I would expect.

Cartridge : .300 Rem Ultra Mag
Bullet : .308, 200, Nosler AccuBond 54618
Useable Case Capaci: 98.799 grain H2O = 6.415 cm³
Cartridge O.A.L. L6: 3.598 inch = 91.39 mm
Barrel Length : 26.0 inch = 660.4 mm

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 56854 psi, or 392 MPa
or a maximum loading ratio or filling of 110 %
These calculations refer to your specified settings in QuickLOAD 'Cartridge Dimensions' window.
C A U T I O N : any load listed can result in a powder charge that falls below minimum suggested
loads or exceeds maximum suggested loads as presented in current handloading manuals. Understand
that all of the listed powders can be unsuitable for the given combination of cartridge, bullet
and gun. Actual load order can vary, depending upon lot-to-lot powder and component variations.
USE ONLY FOR COMPARISON !

66 loads produced a Loading Ratio below user-defined minimum of 90%. These powders have been skipped.
Powder type Filling/Loading Ratio Charge Charge Vel. Prop.Burnt P max P muzz B_Time
% Grains Gramm fps % psi psi ms
--------------------------------- -----------------------------------------------------------------
ADI AR 2218 100.3 97.3 6.31 3008 99.4 56855 14366 1.358 ! Near Maximum !
Vihtavuori N570 95.8 92.0 5.96 2968 98.9 56855 13992 1.389 ! Near Maximum !
Alliant Reloder-33 95.7 95.7 6.20 2950 99.3 56855 13721 1.395 ! Near Maximum !
Alliant Reloder-50 101.9 100.4 6.50 2944 98.8 56855 14073 1.425 ! Near Maximum !
Hodgdon H870 101.8 95.7 6.20 2942 99.7 56855 13422 1.397 ! Near Maximum !
ADI AR 2225 99.3 90.9 5.89 2927 100.0 56855 12130 1.380 ! Near Maximum !
Hodgdon Retumbo 99.3 90.9 5.89 2927 100.0 56855 12130 1.380 ! Near Maximum !
Norma MRP 2 95.0 86.5 5.60 2904 100.0 56855 12408 1.398 ! Near Maximum !
Bofors RP30 95.0 86.5 5.60 2904 100.0 56855 12408 1.398 ! Near Maximum !
PB Clermont PCL 517 90.6 88.1 5.71 2903 100.0 56855 12227 1.386 ! Near Maximum !
IMR 7828 91.9 81.4 5.27 2902 100.0 56855 12132 1.369 ! Near Maximum !
SNPE Vectan SP 12 90.5 88.0 5.70 2902 100.0 56855 12198 1.386 ! Near Maximum !
Accurate 8700 106.6 101.3 6.57 2894 98.7 56855 12768 1.385 ! Near Maximum !
ADI AP 2214 91.9 86.9 5.63 2893 100.0 56855 11870 1.367 ! Near Maximum !
ADI AR 2217 96.7 87.1 5.64 2890 100.0 56855 11838 1.367 ! Near Maximum !
Hodgdon H1000 96.7 87.1 5.64 2890 100.0 56855 11838 1.367 ! Near Maximum !
Vihtavuori 20N29 106.6 104.4 6.77 2886 97.1 56855 13159 1.405 ! Near Maximum !
Vihtavuori 24N41 99.1 96.2 6.23 2885 94.8 56855 13001 1.374 ! Near Maximum !
Bofors 12,7mmRA NC1214 Lot20115087 102.4 98.6 6.39 2885 92.8 56855 13698 1.430 ! Near Maximum !
Alliant Reloder-25 92.8 84.1 5.45 2884 100.0 56855 11509 1.386 ! Near Maximum !
Hodgdon 50BMG 104.3 96.5 6.25 2883 91.3 56855 13316 1.384 ! Near Maximum !
Bofors RP15 90.5 81.5 5.28 2880 100.0 56855 11922 1.386 ! Near Maximum !
Winchester WXR 90.5 81.5 5.28 2880 100.0 56855 11922 1.386 ! Near Maximum !
PB Clermont PCL 513/520/9520 107.8 100.3 6.50 2872 97.6 56855 12795 1.401 ! Near Maximum !
Hodgdon US 869 104.0 100.9 6.54 2872 94.9 56855 13012 1.392 ! Near Maximum !
Bofors RP5 NT ~approximation 91.7 85.1 5.52 2872 99.5 56855 12096 1.365 ! Near Maximum !
SNPE Vectan SP 13 105.9 98.6 6.39 2870 98.4 56855 12661 1.402 ! Near Maximum !
Hodgdon H4831 90.9 80.4 5.21 2841 99.9 56855 11501 1.371 ! Near Maximum !
Vihtavuori N170 99.5 89.6 5.81 2835 97.8 56855 12109 1.399 ! Near Maximum !
Lovex D100 97.0 95.1 6.16 2817 95.3 56855 12021 1.391 ! Near Maximum !
Vihtavuori N160 91.2 79.6 5.16 2801 100.0 56855 10854 1.374 ! Near Maximum !
Vihtavuori N165 90.7 81.7 5.30 2799 100.0 56855 10648 1.389 ! Near Maximum !
Lovex S071 93.6 80.6 5.22 2787 100.0 56855 10500 1.420 ! Near Maximum

 

[bullet]

Man, MRP is one versatile powder, would have like to have known the guy who came up the formula for MRP Way back in the late 60's or early 70's, sure new what he was doing.

 

[SJB358]

This has turned into a great debate anyone have some loads for 200gr. bullets they would like to share and compare?

Here is where I would start...

RL22

Cartridge : .300 Weath. Mag.
Bullet : .308, 200, Nosler AccuBond 54618
Useable Case Capaci: 84.977 grain H2O = 5.517 cm³
Cartridge O.A.L. L6: 3.560 inch = 90.42 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Alliant Reloder-22

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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

-10.0 88 69.84 2669 3164 45101 12395 98.1 1.407
-09.0 89 70.62 2699 3234 46587 12520 98.4 1.385
-08.0 90 71.39 2728 3305 48120 12638 98.7 1.364
-07.0 91 72.17 2757 3376 49702 12752 98.9 1.343
-06.0 92 72.94 2786 3448 51335 12860 99.2 1.323
-05.0 93 73.72 2815 3520 53019 12963 99.4 1.303
-04.0 94 74.50 2844 3593 54758 13060 99.5 1.284
-03.0 95 75.27 2873 3666 56553 13151 99.7 1.264 ! Near Maximum !
-02.0 96 76.05 2902 3740 58407 13236 99.8 1.246 ! Near Maximum !
-01.0 97 76.82 2931 3814 60320 13315 99.9 1.227 ! Near Maximum !
+00.0 98 77.60 2959 3889 62297 13388 100.0 1.209 ! Near Maximum !
+01.0 99 78.38 2988 3964 64338 13454 100.0 1.191 !DANGEROUS LOAD-DO NOT USE!
+02.0 100 79.15 3016 4039 66447 13514 100.0 1.174 !DANGEROUS LOAD-DO NOT USE!
+03.0 101 79.93 3044 4115 68626 13572 100.0 1.157 !DANGEROUS LOAD-DO NOT USE!
+04.0 102 80.70 3072 4191 70878 13628 100.0 1.140 !DANGEROUS LOAD-DO NOT USE!
+05.0 103 81.48 3100 4268 73206 13684 100.0 1.124 !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 98 77.60 3078 4206 74722 12896 100.0 1.119 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 98 77.60 2785 3445 50057 13422 96.5 1.329

RL25

Cartridge : .300 Weath. Mag.
Bullet : .308, 200, Nosler AccuBond 54618
Useable Case Capaci: 84.977 grain H2O = 5.517 cm³
Cartridge O.A.L. L6: 3.560 inch = 90.42 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Alliant Reloder-25

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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

-10.0 94 72.92 2703 3245 44756 12373 100.0 1.398
-09.0 95 73.73 2733 3316 46307 12446 100.0 1.376
-08.0 96 74.54 2762 3388 47913 12513 100.0 1.354
-07.0 97 75.35 2791 3460 49579 12577 100.0 1.332
-06.0 98 76.16 2820 3532 51306 12641 100.0 1.312
-05.0 99 76.97 2849 3605 53096 12705 100.0 1.291
-04.0 100 77.78 2878 3678 54957 12767 100.0 1.271
-03.0 101 78.59 2906 3751 56887 12828 100.0 1.251 ! Near Maximum !
-02.0 102 79.40 2935 3825 58889 12888 100.0 1.232 ! Near Maximum !
-01.0 103 80.21 2963 3899 60968 12947 100.0 1.213 ! Near Maximum !
+00.0 104 81.02 2991 3973 63128 13005 100.0 1.194 ! Near Maximum !
+01.0 105 81.83 3019 4048 65372 13062 100.0 1.176 !DANGEROUS LOAD-DO NOT USE!
+02.0 106 82.64 3047 4123 67702 13118 100.0 1.158 !DANGEROUS LOAD-DO NOT USE!
+03.0 107 83.45 3075 4199 70115 13173 100.0 1.140 !DANGEROUS LOAD-DO NOT USE!
+04.0 108 84.26 3103 4275 72610 13227 100.0 1.123 !DANGEROUS LOAD-DO NOT USE!
+05.0 109 85.07 3130 4352 75196 13279 100.0 1.106 !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 104 81.02 3099 4265 77569 12548 100.0 1.102 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 104 81.02 2825 3544 50092 13571 99.4 1.316

I will run any combo you need Rodger. Let me know.

 

[bullet]

A friend of mine on dangerous game uses a 180gr Swift he says big game just fold up and drop, they don't go anywhere.

180gr Swift
Reloder-22
90.0grs
3165fps
4005energy
60800 psi
26.0 barrel length
3.600 COL

 

[truck driver]

Thanks Scotty
That's a neat program. It varifies what I thought all along that when you reach near max powder charges the less you gain in velocity while increasing the powder charge. At least it seems to hold true with RL 22.

 

[SJB358]

Yeah, the Swift's are some awesome bullets as well. I have recently started trying them out a little. Pretty good so far.

 

[Wincheringen]

If you're loading Alliant Reloder series powders you're already using Norma powders. They are all made by Nammo in Sweden.

Yes they are all made in Sweden, but MRP is not quiet the Same as RL-22 even though they are made in Sweden. Example Q/L has the near max load for 60,000psi with MRP using 62.2grs and RL-22 using 60.3 for near max loads. I know some think they are the exact same powder but they are not and there are many other examples of them not being the same charge for other cartridges and bullets. Nothing is just like MRP, been using it for 30 years now and it is kind of in a class all its own, an outstanding versatile powder and lot to lot is so consistent, not like some lots of RL-22

Hmm, I'm not sure where I said they were the same, or where I said MRP was identical to RL22.

 

[bullet]

If you're loading Alliant Reloder series powders you're already using Norma powders. They are all made by Nammo in Sweden.

Yes they are all made in Sweden, but MRP is not quiet the Same as RL-22 even though they are made in Sweden. Example Q/L has the near max load for 60,000psi with MRP using 62.2grs and RL-22 using 60.3 for near max loads. I know some think they are the exact same powder but they are not and there are many other examples of them not being the same charge for other cartridges and bullets. Nothing is just like MRP, been using it for 30 years now and it is kind of in a class all its own, an outstanding versatile powder and lot to lot is so consistent, not like some lots of RL-22

Hmm, I'm not sure where I said they were the same, or where I said MRP was identical to RL22.

You didn't! I was making comment about how some believe they are the same, your comments just reminded of how some think that.

 

[Guest]

Dr. Mike,
Thanks for the quick load on MRP. Think I'll stay with my RL-25 Powder. :mrgreen:

Don

 

[DrMike]

I would call that a sound choice, Don.

 

[Guest]

Dr Mike,
I think so too. Happy Easter!!!

Don

 

[DrMike]

And a blessed day of remember the Resurrection for you, Don.

 

[RiverRider]

Somewhere, I read that MRP and Re22 are the same powder. I wish I could remember where I read it but I am doing well to remember which two powders.

 

[bullet]

Norma is suppose to get back with me soon on the question I asked them concerning MRP and RL-22. I ask, "Is MRP and RL-22 the exact (not similar but exact in specifications and type) being in essence the same powder?" Will know in the next day or two.