R33 or R26...which is best for 7 Rem Mag?

[preacher]

For top loads in the 7 RM with 160, 168, 175s, it seems there is some overlap between these two. Can I really get enough R33 in a 7 RM to make it worth it over the R26? I love R22, but it seems these two are doing a bit better, anyone know?

 

[DrMike]

At this rate, you could be singing a full concert!

Cartridge : 7 mm Rem. Mag.(SAAMI)
Bullet : .284, 160, Nosler PART SP 16327
Useable Case Capaci: 74.309 grain H2O = 4.825 cm³
Cartridge O.A.L. L6: 3.290 inch = 83.57 mm
Barrel Length : 26.0 inch = 660.4 mm
Powder : Alliant Reloder-33

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 85 64.32 2402 2050 27773 10516 82.4 1.749
-18.0 88 65.93 2475 2176 29889 10959 84.3 1.701
-16.0 90 67.54 2549 2308 32177 11393 86.2 1.653
-14.0 92 69.14 2624 2446 34680 11814 88.1 1.606
-12.0 94 70.75 2700 2590 37402 12220 89.8 1.558
-10.0 96 72.36 2777 2739 40372 12607 91.4 1.501
-08.0 98 73.97 2854 2895 43618 12973 92.9 1.446
-06.0 100 75.58 2933 3056 47175 13314 94.3 1.394
-04.0 103 77.18 3012 3222 51078 13628 95.5 1.342
-02.0 105 78.79 3091 3394 55369 13911 96.6 1.293 ! Near Maximum !
+00.0 107 80.40 3171 3572 60100 14161 97.6 1.245 ! Near Maximum !
+02.0 109 82.01 3251 3754 65325 14374 98.4 1.199 !DANGEROUS LOAD-DO NOT USE!
+04.0 111 83.62 3331 3942 71123 14548 99.0 1.154 !DANGEROUS LOAD-DO NOT USE!
+06.0 113 85.22 3411 4135 77563 14680 99.5 1.111 !DANGEROUS LOAD-DO NOT USE!
+08.0 115 86.83 3492 4332 84728 14767 99.8 1.069 !DANGEROUS LOAD-DO NOT USE!
+10.0 117 88.44 3573 4534 92689 14806 100.0 1.028 !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 107 80.40 3370 4034 76461 13863 100.0 1.129 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 107 80.40 2901 2990 46653 13388 89.0 1.394


Cartridge : 7 mm Rem. Mag.(SAAMI)
Bullet : .284, 160, Nosler PART SP 16327
Useable Case Capaci: 74.309 grain H2O = 4.825 cm³
Cartridge O.A.L. L6: 3.290 inch = 83.57 mm
Barrel Length : 26.0 inch = 660.4 mm
Powder : Alliant Reloder-26

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 55.60 2501 2223 29781 10619 97.2 1.711
-18.0 77 56.99 2566 2338 31920 10887 98.1 1.668
-16.0 79 58.38 2630 2457 34224 11130 98.8 1.626
-14.0 81 59.77 2693 2577 36702 11344 99.4 1.585
-12.0 83 61.16 2756 2699 39384 11530 99.8 1.533
-10.0 85 62.55 2819 2823 42271 11684 100.0 1.484
-08.0 87 63.94 2881 2949 45385 11809 100.0 1.437
-06.0 89 65.33 2942 3075 48703 11924 100.0 1.391
-04.0 91 66.72 3002 3202 52244 12035 100.0 1.347 ! Near Maximum !
-02.0 92 68.11 3062 3331 56038 12143 100.0 1.305 ! Near Maximum !
+00.0 94 69.50 3121 3461 60103 12247 100.0 1.265 ! Near Maximum !
+02.0 96 70.89 3180 3592 64464 12347 100.0 1.226 !DANGEROUS LOAD-DO NOT USE!
+04.0 98 72.28 3238 3724 69145 12443 100.0 1.189 !DANGEROUS LOAD-DO NOT USE!
+06.0 100 73.67 3296 3859 74175 12534 100.0 1.153 !DANGEROUS LOAD-DO NOT USE!
+08.0 102 75.06 3353 3994 79585 12621 100.0 1.118 !DANGEROUS LOAD-DO NOT USE!
+10.0 104 76.45 3410 4132 85413 12703 100.0 1.085 !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 94 69.50 3241 3731 74566 11787 100.0 1.161 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 94 69.50 2936 3062 46281 12816 99.4 1.407

 

[lanman]

For top loads in the 7 RM with 160, 168, 175s, it seems there is some overlap between these two. Can I really get enough R33 in a 7 RM to make it worth it over the R26? I love R22, but it seems these two are doing a bit better, anyone know?

I think you will see the most benefit from the RL33 as the bullets get heavier.. 168's and 175's..
If you ever plan to use lighter than a 160, you can't stuff enough 33 in the case to load it full house.

 

[preacher]

Thanks guys! I just plan on using R33 for 168 and heavier.

 

[SJB358]

For top loads in the 7 RM with 160, 168, 175s, it seems there is some overlap between these two. Can I really get enough R33 in a 7 RM to make it worth it over the R26? I love R22, but it seems these two are doing a bit better, anyone know?

I think you will see the most benefit from the RL33 as the bullets get heavier.. 168's and 175's..
If you ever plan to use lighter than a 160, you can't stuff enough 33 in the case to load it full house.

I figured your ears were ringing when this was posted.... :lol:

 

[preacher]

Well...God loves a joyful "noise"! ha Thanks guys.

 

[preacher]

I'll be able to see for myself before long, just ordered some R26 and R33 and rounded up some 175PTs. Now all I need is for the rifle to get ready, ha.

 

[jmad_81]

I have a buddy that is running 68 gr of RL26 our of a 24" barreled 7 mag with the 168 ABLR. He is getting decent groups, and running just a hair over 3,000 fps. I do not believe that this load is compressed.

Might be worth a shot.

 

[preacher]

Thanks pard! Per my posts on this bullet in the .280, I got 2750fps BUT +1@100 = spot on at 200! so, If I can get anywhere over 3000, its gotta be one flat scooter!