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#6520758 - 10/31/16 08:29 PM Faster Burning Powder for Short Barrel?
Gone to Texas Online   content
Veteran Tracker

Registered: 07/05/13
Posts: 2361
Loc: Hurst
I read a guys post on another forum about loading for a 18" 7mm-08.

He said with faster burning powders like Hodgdon Benchmark he was able to get a 140gr round to average 2740 fps.

I'm curious to know if anyone else has experience with this. Does the quicker burning powder work better with shorter barrels?

What powder would you use in a short barrel 7mm-08?
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#6520799 - 10/31/16 08:49 PM Re: Faster Burning Powder for Short Barrel? [Re: Gone to Texas]
FiremanJG Offline
THF Celebrity

Registered: 12/16/08
Posts: 17893
Loc: Wolfe City, TX
Chad educated me on IMR 8208, and I am thankful for it.
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#6520826 - 10/31/16 09:04 PM Re: Faster Burning Powder for Short Barrel? [Re: Gone to Texas]
RiverRider Offline
THF Trophy Hunter

Registered: 11/11/07
Posts: 6226
Loc: Wise Co.
Code:
Cartridge          : 7 mm-08 Rem.
Bullet             : .284, 140, Nosler BalTip 28140
Useable Case Capaci: 47.343 grain H2O = 3.074 cm³
Cartridge O.A.L. L6: 2.800 inch = 71.12 mm
Barrel Length      : 18.0 inch = 457.2 mm

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 60250 psi, or 415 MPa
or a maximum loading ratio or filling of 105 %
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 !

59 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
---------------------------------  -----------------------------------------------------------------
Alliant Reloder-17                 104.3     47.7     3.09    2811    99.3    60250   13161   0.929  
Winchester 760                     103.2     47.6     3.09    2755    94.9    60250   12835   0.939  
Hodgdon H414                       103.2     47.6     3.09    2755    94.9    60250   12835   0.939  
Hodgdon CFE223                      92.9     45.2     2.93    2741    99.1    60250   12195   0.944  
Ramshot Big Game                    98.4     45.7     2.96    2739    98.7    60250   12193   0.943  
Vihtavuori N550                    105.0     46.8     3.03    2734    97.3    58928   12684   0.957  
IMR 4895                            97.9     42.7     2.77    2731    98.9    60250   12196   0.953  
Hodgdon BL-C2                       93.4     44.5     2.88    2722    99.5    60250   11964   0.955  
Winchester 748                      90.8     42.7     2.76    2721    99.9    60250   11623   0.948  
Norma 203B                          99.2     43.3     2.80    2721    98.9    60250   12052   0.954  
Alliant Reloder-15                  98.7     43.1     2.79    2720    98.5    60250   12091   0.953  
Norma 203 old                      100.9     44.5     2.88    2720    99.4    60250   11978   0.963  
IMR 3031                            98.5     40.2     2.60    2715   100.0    60250   11028   0.953  
IMR 4320                           100.6     43.2     2.80    2708    98.8    60250   11673   0.938  
Hodgdon H4895                       95.1     41.5     2.69    2707    99.2    60250   11786   0.954  
Ramshot Wild Boar                   93.6     43.6     2.83    2706    98.8    60250   11827   0.949  
Hodgdon H380                        99.9     44.6     2.89    2705    97.3    60250   12070   0.956  
Accurate 4064                      100.8     43.0     2.79    2701   100.0    60250   11325   0.983  
Accurate 2520                       93.5     43.0     2.79    2700   100.0    60250   11322   0.966  
Vihtavuori N530                     91.7     40.2     2.61    2684    99.6    60250   11310   0.952  
Accurate 2495                       94.9     40.5     2.62    2683   100.0    60250   10858   0.988  
Hodgdon VARGET                     101.1     42.7     2.76    2682    98.3    60250   11548   0.946  
Vihtavuori N540                     98.2     43.3     2.81    2679   100.0    60250   11110   0.957  
Norma 202                           95.9     41.2     2.67    2678   100.0    60250   10960   0.959  
IMR 4064                           101.8     42.0     2.72    2678    98.5    60250   11395   0.950  
IMR 8208 XBR                        93.7     40.9     2.65    2676    99.6    60250   11203   0.952  
Ramshot TAC                         93.2     43.9     2.84    2674    96.7    60250   11670   0.952  
Norma 201                           96.5     41.2     2.67    2674    99.6    60250   11303   0.966  
Hodgdon H322                        91.6     38.8     2.52    2673   100.0    60250   10635   0.950  
Alliant AR-Comp                     93.6     39.5     2.56    2671   100.0    60250   10184   0.958  
IMR 4007 SSC                       101.3     44.8     2.91    2665    94.1    60250   11730   0.956  
Ramshot X-Terminator                90.9     42.3     2.74    2660    98.8    60250   11211   0.955  
Vihtavuori N135                    104.6     41.4     2.68    2658   100.0    60250   10321   0.963  
Vihtavuori N140                     98.0     41.9     2.72    2656   100.0    60250   10544   0.957  
Accurate 4350                      105.0     45.8     2.97    2655    96.5    53364   12346   1.009  
Norma URP                          105.0     45.3     2.94    2649    96.3    53023   12234   0.998  
Alliant Reloder-12                  91.5     40.7     2.64    2645   100.0    60250   10361   0.955  
Norma 204                          105.0     47.3     3.07    2641    90.7    55342   12075   0.973  
Ramshot Hunter                     105.0     47.3     3.07    2640    93.9    52470   12380   0.998  
Hodgdon Benchmark                   92.7     39.8     2.58    2639    99.8    60250   10652   0.954  
Accurate 2015                       91.7     38.3     2.48    2622   100.0    60250    9911   0.972  
Accurate 2700                      101.1     46.0     2.98    2619    93.8    60250   11031   0.959 
_________________________


Originally Posted By: Cleric
God I am hating caliber threads more and more

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#6520841 - 10/31/16 09:12 PM Re: Faster Burning Powder for Short Barrel? [Re: Gone to Texas]
RiverRider Offline
THF Trophy Hunter

Registered: 11/11/07
Posts: 6226
Loc: Wise Co.
The powder that yields the highest velocity out of a long barrel generally will yield the highest velocity out of a short barrel.

2740 seems a bit high based on what QL is saying here, but there are variables that could make that velocity possible...and maybe even safe.

QL is not perfect, but it usually provides a pretty reliable picture. If I wanted to get the highest velocity out of the 7-08 with a 140, I'd probably go with H4895, but that's because of certain things I look for when choosing a powder. I don't think there's any doubt whatsoever that higher velocities can be achieved with powders other than Benchmark. Accuracy is much more difficult to predict than velocity, though.
_________________________


Originally Posted By: Cleric
God I am hating caliber threads more and more

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#6520846 - 10/31/16 09:14 PM Re: Faster Burning Powder for Short Barrel? [Re: Gone to Texas]
RiverRider Offline
THF Trophy Hunter

Registered: 11/11/07
Posts: 6226
Loc: Wise Co.
I think 8208 looks pretty darned good, too. That powder has a lot going for it.
_________________________


Originally Posted By: Cleric
God I am hating caliber threads more and more

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#6520877 - 10/31/16 09:28 PM Re: Faster Burning Powder for Short Barrel? [Re: RiverRider]
Gone to Texas Online   content
Veteran Tracker

Registered: 07/05/13
Posts: 2361
Loc: Hurst
Thanks!
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#6520899 - 10/31/16 09:41 PM Re: Faster Burning Powder for Short Barrel? [Re: Gone to Texas]
RiverRider Offline
THF Trophy Hunter

Registered: 11/11/07
Posts: 6226
Loc: Wise Co.
Nosler's load data shows what they've found to be the most accurate powder tested, and many say that their suggestions are often spot on. I took a moment to look, and they say Ramshot Big Game is the berries. QL likes the velocity potential, too.
_________________________


Originally Posted By: Cleric
God I am hating caliber threads more and more

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#6525565 - 11/03/16 11:48 AM Re: Faster Burning Powder for Short Barrel? [Re: Gone to Texas]
ckat Offline
Pro Tracker

Registered: 12/02/09
Posts: 1072
Loc: Lubbock Area
I've got a couple of inches on you grin... at 20". 140 grain/RL-15 combo is at 2734 FPS average a little under Red River's QL max charge.

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#6525746 - 11/03/16 01:33 PM Re: Faster Burning Powder for Short Barrel? [Re: ckat]
Gone to Texas Online   content
Veteran Tracker

Registered: 07/05/13
Posts: 2361
Loc: Hurst
Nice! I have some RL-17 sitting on the shelf. Maybe when I get my 7mm-08 set up I will test it.

Just need to find someone to meet at the range who owns a chronograph!
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