Hodgedon vs Barnes data 7mm RM,

I have found 7mm data to be pretty hit and miss. I have carefully exceeded published data with most powders and most bullet weights and it's usually quite a ways over Max listed loads when I get pressure signs and the velocity I'm after. That's in my rifle anyways and I'm not saying start higher than usual but that's just my experience.
 
7mm Rem Mag data is typically very conservative, for whatever reason. I would not be surprised if you could work up to something in the 3075 fps range, in the 65.0grs IMR 4831 ballpark.

Code: 
Cartridge          : 7 mm Rem Mag
Bullet             : .284, 150, Barnes 'TSX' BT 30293
Useable Case Capaci: 77.521 grain H2O = 5.033 cm³
Cartridge O.A.L. L6: 3.290 inch = 83.57 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : IMR 4831

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   85    58.50   2812    2634   47890  11293    100.0    1.327
-09.0   86    59.15   2839    2684   49285  11365    100.0    1.313
-08.0   87    59.80   2865    2734   50719  11433    100.0    1.299
-07.0   88    60.45   2892    2785   52192  11501    100.0    1.283
-06.0   89    61.10   2918    2835   53706  11568    100.0    1.265
-05.0   90    61.75   2944    2886   55262  11634    100.0    1.248  ! Near Maximum !
-04.0   91    62.40   2969    2937   56861  11700    100.0    1.232  ! Near Maximum !
-03.0   92    63.05   2995    2988   58503  11765    100.0    1.215  ! Near Maximum !
-02.0   93    63.70   3021    3039   60192  11829    100.0    1.198  ! Near Maximum !
-01.0   94    64.35   3046    3090   61927  11893    100.0    1.183  ! Near Maximum !
+00.0   95    65.00   3071    3142   63711  11955    100.0    1.167  ! Near Maximum !
+01.0   96    65.65   3096    3193   65545  12017    100.0    1.152  !DANGEROUS LOAD-DO NOT USE!

There are quite a few powers out there too that will provide more velocity than IMR 4831 too, in this application

Code: 
Cartridge          : 7 mm Rem Mag
Bullet             : .284, 150, Barnes 'TSX' BT 30293
Useable Case Capaci: 77.521 grain H2O = 5.033 cm³
Cartridge O.A.L. L6: 3.290 inch = 83.57 mm
Barrel Length      : 24.0 inch = 609.6 mm

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 62000 psi, or 427 MPa
or a maximum loading ratio or filling of 103 %
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 !

28 loads produced a Loading Ratio below user-defined minimum of 85%. 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
---------------------------------  -----------------------------------------------------------------
Alliant RL26                        94.0     72.2     4.68    3179   100.0    62000   13740   1.176  ! Near Maximum !
Alliant RL25                       102.9     73.1     4.74    3169   100.0    62000   13417   1.157  ! Near Maximum !
IMR 7828ssc                         96.0     70.5     4.57    3162    99.2    62000   14003   1.149  ! Near Maximum !
IMR 7828                           101.5     70.5     4.57    3162    99.2    62000   14003   1.149  ! Near Maximum !
AA MagPro                           97.3     73.9     4.79    3157    97.9    62000   14535   1.168  ! Near Maximum !
Alliant RL22                        97.3     70.3     4.55    3141    99.7    62000   13821   1.166  ! Near Maximum !
Ramshot Magnum                      97.2     75.7     4.90    3122   100.0    62000   13221   1.163  ! Near Maximum !
Alliant RL19                        94.6     67.6     4.38    3103    99.7    62000   13216   1.159  ! Near Maximum !
Alliant RL17                        85.3     64.0     4.14    3102   100.0    62000   12319   1.166  ! Near Maximum !
Alliant RL23                        99.4     69.5     4.50    3097   100.0    62000   12404   1.176  ! Near Maximum !
Hodgdon H414                        85.2     64.4     4.17    3092   100.0    62000   12783   1.167  ! Near Maximum !
Winchester 760                      85.2     64.4     4.17    3092   100.0    62000   12783   1.167  ! Near Maximum !
Ramshot Hunter                      90.2     66.5     4.31    3091   100.0    62000   12689   1.167  ! Near Maximum !
Hodgdon H4831sc                     95.9     69.3     4.49    3083    98.6    62000   13127   1.156  ! Near Maximum !
Hodgdon H4831                       99.8     69.3     4.49    3083    98.6    62000   13127   1.156  ! Near Maximum !
IMR 4831                            94.1     64.4     4.17    3047   100.0    62000   11895   1.182  ! Near Maximum !
Hodgdon H4350                       92.5     64.7     4.19    3044    99.9    62000   12202   1.161  ! Near Maximum !
IMR 4350                            90.8     64.5     4.18    3044    99.9    62000   12173   1.161  ! Near Maximum !
 
OldDude,, the Hodgedon data is for the TTSX bullet specifically. Barnes manual says the TTSX and TSX use the same data

http://www.hodgdonreloading.com/data/rifle

To see specific bullets, select cartridge 7mm RM, manufacturer IMR, leave bullet weight set at "any", then select powder 4831. Then scroll through different bullets available.

Thanks for all the input guys. I guess the plan is to start low and work up.
 
Leatherstocking said:
OldDude,, the Hodgedon data is for the TTSX bullet specifically. Barnes manual says the TTSX and TSX use the same data

http://www.hodgdonreloading.com/data/rifle

To see specific bullets, select cartridge 7mm RM, manufacturer IMR, leave bullet weight set at "any", then select powder 4831. Then scroll through different bullets available.

Thanks for all the input guys. I guess the plan is to start low and work up.
Click to expand...

Barnes says the TTSX and TSX data can be interchanged - but remember they are specifically referring ONLY to their own data, not anybody else's data.

The TTSX is longer because of the polymer tip. The different length won't make a big difference - IF you are using Barnes data - because the Barnes data is obviously very conservative as you have just seen. If you start pushing it to higher pressure levels then there will likely come a point at which the reduced case capacity in the TTSX loaded cartridge will increase pressure faster than it would for the TSX bullet, if they are loaded with the same powder weight and COL. Just something to keep in mind.
 
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