7 mag Quickload request please - Results..

[ReloadKy]

i hate to ask and I know it is not ideal for the 7mag but my rifle really likes Reloader 17.
Rifle Tikka 7 mag with a 24 inch barrel
Powder Reloader 17
Bullet 140 gr Barnes TTSX
Primer CCI Large rifle magnum
I would like to try and work up a good load for this bullet and I cannot find any load data. Any help is appreciated.

 

[JD338]

I think RL17 may be a tad too fast a burn rate for the 7 mm Rem Mag. I've had excellent speed and accuracy with 140 gr bullets and RL22.

JD338

 

[DrMike]

Cartridge          : 7 mm Rem. Mag.(SAAMI)
Bullet             : .284, 140, Barnes 'TTSX'BT 30300
Useable Case Capaci: 73.085 grain H2O = 4.745 cm³
Cartridge O.A.L. L6: 3.290 inch = 83.57 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Alliant Reloder-17 *T

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   80    56.25   2876    2571   42937  11400    100.0    1.320
-09.0   80    56.88   2905    2623   44311  11473    100.0    1.301
-08.0   81    57.50   2933    2675   45730  11540    100.0    1.282
-07.0   82    58.13   2962    2727   47194  11605    100.0    1.264
-06.0   83    58.75   2990    2779   48704  11669    100.0    1.246
-05.0   84    59.38   3018    2832   50262  11733    100.0    1.228
-04.0   85    60.00   3046    2884   51867  11796    100.0    1.211  ! Near Maximum !
-03.0   86    60.63   3074    2937   53513  11858    100.0    1.194  ! Near Maximum !
-02.0   87    61.25   3101    2990   55203  11920    100.0    1.177  ! Near Maximum !
-01.0   88    61.88   3129    3043   56941  11981    100.0    1.161  ! Near Maximum !
+00.0   88    62.50   3156    3096   58730  12041    100.0    1.145  ! Near Maximum !
+01.0   89    63.13   3183    3150   60572  12100    100.0    1.129  !DANGEROUS LOAD-DO NOT USE!
+02.0   90    63.75   3210    3203   62469  12159    100.0    1.114  !DANGEROUS LOAD-DO NOT USE!
+03.0   91    64.38   3237    3257   64423  12217    100.0    1.099  !DANGEROUS LOAD-DO NOT USE!
+04.0   92    65.00   3264    3311   66435  12274    100.0    1.084  !DANGEROUS LOAD-DO NOT USE!
+05.0   93    65.63   3290    3365   68507  12330    100.0    1.069  !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     88    62.50   3214    3210   64634  11834    100.0    1.101  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba     88    62.50   3085    2958   52820  12292    100.0    1.196  ! Near Maximum !

 

[RL338]

I try RL-17 and Berger 140gr VLD in my 7mm RM and as Jim noted it’s a bit to fast. RL-22

 

[ReloadKy]

Thank you Dr. Mike

 

[Aussie Wanderer]

I was using RL22 with the 150 Nosler ballistic tip in my 7RM. A fantastic bullet and has never let me down. RL22 on the other hand is as rare as hens teeth in Australia now...as are all alliant powders.

 

[michsteve]

I was using RL22 with the 150 Nosler ballistic tip in my 7RM. A fantastic bullet and has never let me down. RL22 on the other hand is as rare as hens teeth in Australia now...as are all alliant powders.

Can you get Norma? Norma MRP is basically RL22. I have 4 lbs of the Norma and 6 of RL22, I have used the MRP not the RL22 yet. Norma seems to have stopped importing their powders into US so the Norma I have is likely the last I will ever be able to use. I have URP that is like 4350 and 203B that is like RL15.

 

[Aussie Wanderer]

No we can't get Norma or any of the Winchester powders either. I believe we are even struggling to maintain supply of our own homegrown shotgun powders. Bit dire eh ;-)

 

[SJB358]

I'd give 17 a try. Same burn rate as 4350 with some extra FPS, especially with 120-140's it should scoot pretty well. 17 is one of my favorites.

 

[ReloadKy]

Got around to shooting this weekend. I stayed a little uner max with Reloader 17 and my 4 shot average was 3040 fps, sub moa and produced an SD of 5. My rifle like Reloader 17 and I know I can get more velocity with different powders, heck I have done it myself. But, for KY whitetails I think 3040 fps with a 140gr Barnes TTSX will be very deadly.

 

[Guy Miner]

Nice! And you've got to love that tight SD figure...

Guy

 

[salmonchaser]

Low SD is where it’s at. That load will work well I should think.

 

[JD338]

Nothing wrong with that load.
Nice work!

JD338

 

[SJB358]

Sounds like a great load to me.