QL for 7mm weatherby mag

[hhunter23]

im looking for some more variety of powders to use for my 7mm weatherby. can someone run the QL for some 168 LRAB's with a bunch of different powders. thanks for the help

 

[DrMike]

Cartridge          : 7 mm Weath. Mag.
Bullet             : .284, 168, Nosler Accubond LR 58623
Useable Case Capaci: 76.858 grain H2O = 4.990 cm³
Cartridge O.A.L. L6: 3.360 inch = 85.34 mm
Barrel Length      : 26.0 inch = 660.4 mm

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 63000 psi, or 434 MPa
or a maximum loading ratio or filling of 110 %
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 !

45 loads produced a Loading Ratio below user-defined minimum of 90%. 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
---------------------------------  -----------------------------------------------------------------
ADI AR 2218                        108.9     82.2     5.33    3205    98.8    63000   15019   1.230  ! Near Maximum !
Vihtavuori N570                    105.0     78.4     5.08    3181    98.5    63000   14688   1.255  ! Near Maximum !
ReloadSwiss RS 80                  108.1     83.1     5.38    3176    99.2    63000   14447   1.251  ! Near Maximum !
Alliant Reloder-33                 105.4     82.1     5.32    3168    98.7    63000   14509   1.256  ! Near Maximum !
ADI AR 2225                        108.8     77.5     5.02    3140   100.0    63000   12766   1.248  ! Near Maximum !
Hodgdon Retumbo                    108.8     77.5     5.02    3140   100.0    63000   12766   1.248  ! Near Maximum !
Hodgdon H870                       110.0     80.5     5.21    3112    99.2    59929   14035   1.287  ! Near Maximum !
Alliant Reloder-50                 110.0     84.3     5.46    3110    97.8    59375   14670   1.315  ! Near Maximum !
Norma MRP 2                        104.1     73.7     4.78    3108   100.0    63000   13049   1.269  ! Near Maximum !
Bofors RP30                        104.1     73.7     4.78    3108   100.0    63000   13049   1.269  ! Near Maximum !
PB Clermont PCL 517                 99.0     74.9     4.85    3107   100.0    63000   12824   1.255  ! Near Maximum !
Vihtavuori N560                     96.2     69.7     4.51    3107    99.8    63000   13130   1.258  ! Near Maximum !
Norma 217                          110.0     76.8     4.97    3106   100.0    60278   13089   1.295  ! Near Maximum !
SNPE Vectan SP 12                   98.9     74.8     4.84    3105   100.0    63000   12792   1.255  ! Near Maximum !
Accurate MAGPRO                     96.5     72.7     4.71    3102    99.4    63000   13322   1.265  ! Near Maximum !
IMR 7828                           100.6     69.3     4.49    3096   100.0    63000   12681   1.248  ! Near Maximum !
IMR 7828 SSC                        95.2     69.3     4.49    3096   100.0    63000   12681   1.248  ! Near Maximum !
Norma MRP                           94.4     69.8     4.52    3094   100.0    63000   12556   1.267  ! Near Maximum !
Alliant Reloder-25                 101.9     71.8     4.65    3088   100.0    63000   12085   1.259  ! Near Maximum !
ADI AP 2214                        100.2     73.7     4.78    3088   100.0    63000   12416   1.242  ! Near Maximum !
Hodgdon H1000                      105.4     73.9     4.79    3085   100.0    63000   12382   1.242  ! Near Maximum !
ADI AR 2217                        105.4     73.9     4.79    3085   100.0    63000   12382   1.242  ! Near Maximum !
ADI AR 2213                         96.3     69.0     4.47    3085    99.9    63000   12611   1.244  ! Near Maximum !
Alliant Reloder-22                  96.5     69.1     4.48    3075   100.0    63000   12475   1.264  ! Near Maximum !
Raufoss RA15                        96.5     69.1     4.48    3075   100.0    63000   12475   1.264  ! Near Maximum !
Bofors RP5/NP ~approximation        96.5     69.1     4.48    3075   100.0    63000   12475   1.264  ! Near Maximum !
Winchester WXR                      99.1     69.5     4.50    3075   100.0    63000   12503   1.265  ! Near Maximum !
Bofors RP15                         99.1     69.5     4.50    3075   100.0    63000   12503   1.265  ! Near Maximum !
Vihtavuori 24N41                   107.6     81.2     5.26    3074    93.7    63000   13467   1.246  ! Near Maximum !
Bofors RP5 NT ~approximation       100.0     72.3     4.68    3061    99.2    63000   12638   1.245  ! Near Maximum !
Ramshot Magnum                      96.4     74.4     4.82    3053   100.0    63000   11887   1.264  ! Near Maximum !
Rottweil R905                       97.9     68.8     4.46    3052    99.8    63000   12355   1.263  ! Near Maximum !
ADI AR 2209                         93.4     65.8     4.26    3039   100.0    63000   11888   1.251  ! Near Maximum !
Alliant Reloder-19                  93.9     66.5     4.31    3037   100.0    63000   11942   1.258  ! Near Maximum !
Bofors RP14 ~approximation          94.6     67.0     4.34    3030   100.0    63000   11863   1.258  ! Near Maximum !
Bofors 12,7mmRA NC1214 Lot20115087 110.0     82.4     5.34    3028    90.8    59590   14024   1.329  ! Near Maximum !
Hodgdon H4831 SC                    95.2     68.2     4.42    3023    99.7    63000   11980   1.255  ! Near Maximum !
Hodgdon H4831                       99.1     68.2     4.42    3023    99.7    63000   11980   1.255  ! Near Maximum !
Vihtavuori N170                    108.2     75.9     4.92    3019    97.2    63000   12597   1.275  ! Near Maximum !
Bofors RP4 ~approximation           92.1     65.3     4.23    3016   100.0    63000   11678   1.257  ! Near Maximum !
Raufoss RA4                         92.1     65.3     4.23    3016   100.0    63000   11678   1.257  ! Near Maximum !
Lovex D100                         105.2     80.2     5.20    2997    94.3    63000   12426   1.265  ! Near Maximum !
Somchem S385                        94.0     67.3     4.36    2994   100.0    63000   11339   1.279  ! Near Maximum !
Rottweil R904                       93.1     65.0     4.21    2994    99.9    63000   11502   1.257  ! Near Maximum !
Winchester Supreme 780              92.8     69.3     4.49    2992   100.0    63000   11387   1.265  ! Near Maximum !
Vihtavuori N165                     99.0     69.4     4.50    2981   100.0    63000   11113   1.271  ! Near Maximum !
Vihtavuori N160                     99.4     67.5     4.38    2977    99.9    63000   11302   1.261  ! Near Maximum !
Somchem S365                        90.4     63.7     4.13    2976   100.0    63000   10609   1.285  ! Near Maximum !
Hodgdon H4350                       91.8     63.7     4.13    2974   100.0    63000   10979   1.260  ! Near Maximum !
IMR 4350                            90.1     63.5     4.12    2973   100.0    63000   10951   1.260  ! Near Maximum !
Accurate 3100                       96.7     68.5     4.44    2971   100.0    63000   10957   1.297  ! Near Maximum !
Lovex S071                         102.3     68.5     4.44    2971   100.0    63000   10957   1.297  ! Near Maximum !
IMR 4831                            93.4     63.4     4.11    2968   100.0    63000   10714   1.283  ! Near Maximum !
Somchem S361                        92.2     69.6     4.51    2966    99.7    63000   11350   1.269  ! Near Maximum !
Hodgdon US 869                     110.0     83.0     5.38    2963    92.1    56358   13117   1.324  ! Near Maximum !
Hodgdon 50BMG                      110.0     79.1     5.13    2959    88.1    56130   13249   1.323  ! Near Maximum !
Hodgdon Hybrid 100V                 91.4     62.7     4.06    2936   100.0    63000   10124   1.277  ! Near Maximum !

 

[JD338]

Oh man, that is some impressive speeds for the 168 gr ABLR.
She is going to shoot flatter than road kill.

JD338

 

[DrMike]

Almost makes me want to build a 7mm Weatherby. Hmmmmm.

 

[hhunter23]

thanks a million! this is going to be a shooter!

 

[SJB358]

Oh man, that is some impressive speeds for the 168 gr ABLR.
She is going to shoot flatter than road kill.

JD338

Jim, check out the other thread where Mike ran the numbers on the 7mm WSM and 168 ABLR's.... It is very impressive with the 168's. I know mine is humping the 168's along at 3100 and I thought my chrono was monkied up.

 

[Dr. Vette]

OK, as the other 7mm Wby guy around here I have a couple of questions.

First, on a previous version of the ABLR web page they recommend a faster twist than 1 in 10. However, I've heard that speed can make up for twist, so can the 7mm Wby really stabliize a 168gr ABLR bullet?

Second, as I look at the QL data the really fast, sexy loads are all compressed. Is there any harm to jamming 77.5gr of Retumbo in there and smashing it down? I get the smallest bit of compression with what I currently load, and can often get rid of that if I tap the case several times before seating the bullet. Jamming in 8.8% more powder seems like a lot to me, so I thought I'd ask.

Patrick

 

[DrMike]

Patrick,

So long as you are not actually crushing the granules, there is no degradation of performance in a compressed load. The deterrent should not be significantly crushed. Effectively, this means that for many stick powders, 110% case fill is easily obtainable without degradation of burn rates.

 

[Dr. Vette]

Mike,

Another silly question - how do you know if they are being crushed? It is obvious?
It seems to me that if you're compressing them you're going to be crushing them, but...

 

[DrMike]

Patrick,

I count crushing as when I can hear the "crunching" of the granules and when I can feel the crushing. My rough calculation is that a 114% case fill is a severely compressed load. Generally, a 110% case fill is compressed, but not crush. These figures generally hold for stick powders; ball powders change the equation due to their shape. To compress without crushing, I use a long drop tube to fill the case. If it is severely compressed, I will leave the drop tube or funnel in place and gently tap the side of the case with a glass rod to settle the granules. A brass rod or a silver spoon will work equally well for this purpose. This is only to eliminate any possibility of sparking. Alternatively, I sometimes place the bullet in the top to block the case and tap the side. The point is to settle the granules without spilling what has been weighed out.

 

[Dr. Vette]

OK, sounds like your techniques are similar to what I do. I'll have to see if I get around to trying the 168; I'd have to find some first.

Any thoughts on the twist rate?

Patrick

 

[SJB358]

I run the 1-9.5 and have done well with the 168's Patrick, sorry I can't help with the 168's but no way to find out other than trying a few. Shoot me long and see if they hold up. Are Weatherby 7mms 1-10"?

 

[Dr. Vette]

Yes, Weatherbys are 1 in 10. Yet, they stabilize the 175 grain factory loads just fine.
However, at the cost/rarity of the 168 ABLR I don't really want to waste them if they won't work anyway.

 

[SJB358]

Yeah, the 168's are long pills. You might do just fine though. Wished I was at home to measure them for you. It might give you an idea if it's even worth the shot.