7mm Remington mag.

[salmonchaser]

Im loading for a friend, he has an old 7mm Remington mag. I have Rl. 26 and H1000 available, with 160 grain tsx, bullets. Hoping for a quickload to find a perfect load.
Thanks in advance.

 

[TackDriver284]

Used a 24 inch barrel length, if you have any H20, OAL , etc info, I could crunch it further for you.

Cartridge          : 7 mm Rem. Mag.(SAAMI)
Bullet             : .284, 160, Barnes 'TSX' 30291
Useable Case Capaci: 72.196 grain H2O = 4.688 cm³
Cartridge O.A.L. L6: 3.290 inch = 83.57 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Hodgdon H1000 *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   96    63.00   2648    2492   40502  11817     94.7    1.421
-09.0   97    63.70   2681    2555   41942  11967     95.3    1.397
-08.0   98    64.40   2715    2618   43439  12111     95.9    1.374
-07.0   99    65.10   2748    2683   44994  12249     96.4    1.351
-06.0  100    65.80   2782    2749   46609  12382     96.9    1.328
-05.0  101    66.50   2815    2815   48296  12507     97.3    1.306
-04.0  102    67.20   2849    2883   50050  12626     97.7    1.284
-03.0  103    67.90   2882    2951   51875  12739     98.1    1.263  ! Near Maximum !
-02.0  104    68.60   2916    3020   53776  12844     98.5    1.241  ! Near Maximum !
-01.0  105    69.30   2949    3090   55757  12941     98.8    1.221  ! Near Maximum !
+00.0  106    70.00   2983    3160   57822  13031     99.1    1.200  ! Near Maximum !
+01.0  107    70.70   3016    3232   59977  13113     99.3    1.180  ! Near Maximum !
+02.0  108    71.40   3050    3304   62223  13187     99.5    1.161  !DANGEROUS LOAD-DO NOT USE!
+03.0  110    72.10   3083    3377   64572  13252     99.7    1.141  !DANGEROUS LOAD-DO NOT USE!
+04.0  111    72.80   3116    3450   67023  13309     99.8    1.122  !DANGEROUS LOAD-DO NOT USE!
+05.0  112    73.50   3150    3524   69586  13357     99.9    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    106    70.00   3135    3493   70678  12567    100.0    1.104  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    106    70.00   2768    2722   46761  12635     92.6    1.324

 

[TackDriver284]

Cartridge          : 7 mm Rem. Mag.(SAAMI)
Bullet             : .284, 160, Barnes 'TSX' 30291
Useable Case Capaci: 72.196 grain H2O = 4.688 cm³
Cartridge O.A.L. L6: 3.290 inch = 83.57 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Alliant Reloder-26 *C

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   86    61.20   2737    2661   41473  12544     99.7    1.434
-09.0   86    61.88   2768    2722   42967  12635     99.8    1.410
-08.0   87    62.56   2799    2784   44519  12717     99.9    1.387
-07.0   88    63.24   2830    2846   46138  12791    100.0    1.364
-06.0   89    63.92   2861    2909   47817  12855    100.0    1.342
-05.0   90    64.60   2892    2972   49549  12916    100.0    1.320
-04.0   91    65.28   2923    3035   51337  12975    100.0    1.299
-03.0   92    65.96   2953    3098   53185  13033    100.0    1.278  ! Near Maximum !
-02.0   93    66.64   2983    3162   55100  13091    100.0    1.258  ! Near Maximum !
-01.0   94    67.32   3013    3226   57083  13147    100.0    1.238  ! Near Maximum !
+00.0   95    68.00   3043    3291   59138  13202    100.0    1.218  ! Near Maximum !
+01.0   96    68.68   3073    3355   61267  13256    100.0    1.199  !DANGEROUS LOAD-DO NOT USE!
+02.0   97    69.36   3103    3421   63474  13309    100.0    1.180  !DANGEROUS LOAD-DO NOT USE!
+03.0   98    70.04   3132    3486   65762  13361    100.0    1.161  !DANGEROUS LOAD-DO NOT USE!
+04.0   99    70.72   3162    3552   68134  13412    100.0    1.143  !DANGEROUS LOAD-DO NOT USE!
+05.0  100    71.40   3191    3618   70595  13462    100.0    1.125  !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    68.00   3169    3569   73640  12690    100.0    1.115  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     95    68.00   2848    2882   45503  13694     98.7    1.358

 

[salmonchaser]

Thank you, 24 inch is perfect.

 

[TackDriver284]

Thank you, 24 inch is perfect.

You are welcome.

 

[JD338]

SC,
RL22 is a fantastic powder in the 7mm Rem Mag

JD338

 

[Guy Miner]

SC,
RL22 is a fantastic powder in the 7mm Rem Mag

JD338

I grumbled when I finally ran out of RL-22 last year.

It was excellent in the 7mm Rem Mag and the 6mm Remington as well. Good velocity and accuracy.

Guy

 

[Bruce Mc]

H-1000 was specifically designed for 1000 yd match shooting with the magnum cartridges. It is temperature stable and gives excellent accuracy in the 7 rem mag. It doesn't yield top velocity compared to Re-26. My 7mm Rem load is 160 Nosler AB and H-1000 and have shot several 1/4" and several smaller three shot groups

 

[salmonchaser]

I've used Rl22 in several 7mm, I agree it's just about perfect. But I'm out. I have a good supply of 1000 and 26, and like both of those equally in my 338 Jarrett. I think I'm just flipping a coin

 

[DrMike]

H1000 was one of the go-to propellants when loading commercially. It was most dependable in the 7RM, always producing reasonable velocities and fine accuracy in a variety of rifles.

 

[Aussie Wanderer]

I grumbled when I finally ran out of RL-22 last year.

It was excellent in the 7mm Rem Mag and the 6mm Remington as well. Good velocity and accuracy.

Guy

Agreed, in the 6mm Rem with 95 and 100 grain bullets it is lethal, and very accurate in my rifle.