Need R22 in 7mm Weatherby / Mashburn with 150's Nosler PT

[Leslil]

I'm actually loading a 7mm Mashburn but weatherby data works. But I need real world data.
Hornady list max with a 154gr & R22 at 75.8gr. @ 3300
Nosler list max with 150gr. & R22 at 72gr. @3253
Does it really take 3.5grs of powder to make a 4gr. Bullet 47fps faster.

My chrono should be here next week so I'm just going to load up a few starting at 68gr. and go up to 74gr in .5gr. steps and wait on my chrono. But I'd still like to hear what you all have found with R22 and the big 7's.

 

[Dwh7271]

No personal knowledge but here are a couple QLs. Used a 24" barrel.

Just an observation, the difference between the two bullets is going to have more variables than just weight. Bearing surface of the bullet, BT vs flat, etc. That could partially account for the difference.
You also have two different companies manuals in the mix. Some load a little more aggressively others not.
Just my opinions though. YMMV.

Cartridge : 7 mm Weath. Mag.
Bullet : .284, 154, Hornady SST InterLock 28302
Useable Case Capaci: 78.782 grain H2O = 5.115 cm³
Cartridge O.A.L. L6: 3.360 inch = 85.34 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 0.297% 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

-03.0 95 69.80 3055 3192 57633 13921 99.6 1.214 ! Near Maximum !
-02.7 95 70.02 3065 3211 58192 13949 99.7 1.208 ! Near Maximum !
-02.4 96 70.23 3074 3231 58756 13977 99.7 1.203 ! Near Maximum !
-02.1 96 70.44 3083 3250 59326 14003 99.7 1.197 ! Near Maximum !
-01.8 96 70.66 3092 3269 59901 14029 99.8 1.192 ! Near Maximum !
-01.5 97 70.87 3101 3289 60481 14054 99.8 1.187 ! Near Maximum !
-01.2 97 71.09 3110 3308 61067 14079 99.8 1.182 ! Near Maximum !
-00.9 97 71.30 3119 3327 61659 14104 99.9 1.176 ! Near Maximum !
-00.6 97 71.51 3128 3347 62256 14127 99.9 1.171 ! Near Maximum !
-00.3 98 71.73 3138 3366 62860 14150 99.9 1.166 ! Near Maximum !
+00.0 98 71.94 3147 3386 63469 14172 99.9 1.161 !DANGEROUS LOAD-DO NOT USE!
+00.3 98 72.15 3156 3405 64084 14194 99.9 1.155 !DANGEROUS LOAD-DO NOT USE!
+00.6 99 72.37 3165 3425 64705 14215 100.0 1.150 !DANGEROUS LOAD-DO NOT USE!
+00.9 99 72.58 3174 3445 65332 14236 100.0 1.145 !DANGEROUS LOAD-DO NOT USE!
+01.2 99 72.79 3183 3464 65965 14256 100.0 1.140 !DANGEROUS LOAD-DO NOT USE!
+01.5 99 73.01 3192 3484 66604 14275 100.0 1.135 !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba 98 71.94 3217 3540 69740 13905 100.0 1.114 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba 98 71.94 3061 3203 57245 14283 98.8 1.215 ! Near Maximum !

Here's the Nosler, I used an ABLR 150.

Cartridge : 7 mm Weath. Mag.
Bullet : .284, 150, Nosler AccuBond LR 58734 G7
Useable Case Capaci: 78.616 grain H2O = 5.104 cm³
Cartridge O.A.L. L6: 3.360 inch = 85.34 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 0.297% 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

-03.0 95 69.80 3075 3149 56653 13843 99.4 1.211 ! Near Maximum !
-02.7 96 70.02 3084 3169 57205 13872 99.4 1.205 ! Near Maximum !
-02.4 96 70.23 3094 3188 57762 13901 99.5 1.200 ! Near Maximum !
-02.1 96 70.44 3103 3207 58325 13929 99.5 1.194 ! Near Maximum !
-01.8 96 70.66 3112 3226 58893 13957 99.6 1.189 ! Near Maximum !
-01.5 97 70.87 3122 3246 59466 13984 99.6 1.183 ! Near Maximum !
-01.2 97 71.09 3131 3265 60045 14010 99.7 1.178 ! Near Maximum !
-00.9 97 71.30 3140 3284 60630 14036 99.7 1.173 ! Near Maximum !
-00.6 98 71.51 3150 3304 61220 14061 99.8 1.168 ! Near Maximum !
-00.3 98 71.73 3159 3323 61816 14086 99.8 1.162 ! Near Maximum !
+00.0 98 71.94 3168 3343 62418 14110 99.8 1.157 ! Near Maximum !
+00.3 98 72.15 3177 3362 63026 14134 99.9 1.152 ! Near Maximum !
+00.6 99 72.37 3187 3382 63640 14156 99.9 1.147 !DANGEROUS LOAD-DO NOT USE!
+00.9 99 72.58 3196 3402 64259 14179 99.9 1.142 !DANGEROUS LOAD-DO NOT USE!
+01.2 99 72.79 3205 3421 64885 14200 99.9 1.137 !DANGEROUS LOAD-DO NOT USE!
+01.5 100 73.01 3214 3441 65517 14221 99.9 1.132 !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba 98 71.94 3242 3500 68647 13857 100.0 1.110 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba 98 71.94 3079 3157 56245 14177 98.5 1.212 ! Near Maximum !

 

[Leslil]

Thanks a lot.
I hate to ask but could you increase the oal to 3.42" and see what we get on QL with a 150gr. Nosler Partition?

 

[Dwh7271]

Cartridge : 7 mm Weath. Mag.
Bullet : .284, 150, Nosler PART SP 16326
Useable Case Capaci: 81.420 grain H2O = 5.287 cm³
Cartridge O.A.L. L6: 3.420 inch = 86.87 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 0.287% 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

-02.9 95 72.22 3116 3233 58871 14375 99.7 1.189 ! Near Maximum !
-02.6 95 72.44 3125 3252 59424 14402 99.7 1.183 ! Near Maximum !
-02.3 96 72.65 3134 3271 59982 14428 99.7 1.178 ! Near Maximum !
-02.0 96 72.86 3143 3290 60545 14454 99.8 1.173 ! Near Maximum !
-01.7 96 73.08 3152 3309 61114 14479 99.8 1.168 ! Near Maximum !
-01.4 97 73.29 3161 3328 61688 14504 99.8 1.163 ! Near Maximum !
-01.1 97 73.51 3170 3347 62267 14528 99.9 1.158 ! Near Maximum !
-00.9 97 73.72 3179 3366 62852 14552 99.9 1.153 ! Near Maximum !
-00.6 97 73.93 3188 3385 63442 14575 99.9 1.148 !DANGEROUS LOAD-DO NOT USE!
-00.3 98 74.15 3197 3404 64037 14597 99.9 1.143 !DANGEROUS LOAD-DO NOT USE!
+00.0 98 74.36 3206 3423 64638 14619 100.0 1.138 !DANGEROUS LOAD-DO NOT USE!
+00.3 98 74.57 3215 3442 65245 14640 100.0 1.133 !DANGEROUS LOAD-DO NOT USE!
+00.6 99 74.79 3224 3461 65858 14660 100.0 1.128 !DANGEROUS LOAD-DO NOT USE!
+00.9 99 75.00 3232 3480 66476 14680 100.0 1.124 !DANGEROUS LOAD-DO NOT USE!
+01.1 99 75.21 3241 3499 67100 14699 100.0 1.119 !DANGEROUS LOAD-DO NOT USE!
+01.4 99 75.43 3250 3519 67730 14718 100.0 1.114 !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba 98 74.36 3277 3577 70973 14345 100.0 1.092 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba 98 74.36 3119 3239 58343 14740 98.9 1.191 ! Near Maximum !

 

[Leslil]

Thank you so much Sir!!

 

[Dwh7271]

You are welcome