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 Faster Burning Powder for Short Barrel?
#6520758
11/01/16 01:29 AM
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Joined: Jul 2013
Posts: 2,778
Gone to Texas
OP
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OP
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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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Re: Faster Burning Powder for Short Barrel?
[Re: Gone to Texas]
#6520799
11/01/16 01:49 AM
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Joined: Dec 2008
Posts: 41,171
J.G.
THF Celebrity
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THF Celebrity
Joined: Dec 2008
Posts: 41,171 |
Chad educated me on IMR 8208, and I am thankful for it.
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Re: Faster Burning Powder for Short Barrel?
[Re: Gone to Texas]
#6520826
11/01/16 02:04 AM
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Joined: Nov 2007
Posts: 9,520
RiverRider
THF Trophy Hunter
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THF Trophy Hunter
Joined: Nov 2007
Posts: 9,520 |
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
![[Linked Image]](https://i.imgur.com/Kqs020H.jpg) "Arguing with you always makes me thirsty." -Augustus McRae
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Re: Faster Burning Powder for Short Barrel?
[Re: Gone to Texas]
#6520841
11/01/16 02:12 AM
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Joined: Nov 2007
Posts: 9,520
RiverRider
THF Trophy Hunter
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THF Trophy Hunter
Joined: Nov 2007
Posts: 9,520 |
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.
"Arguing with you always makes me thirsty." -Augustus McRae
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Re: Faster Burning Powder for Short Barrel?
[Re: Gone to Texas]
#6520846
11/01/16 02:14 AM
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Joined: Nov 2007
Posts: 9,520
RiverRider
THF Trophy Hunter
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THF Trophy Hunter
Joined: Nov 2007
Posts: 9,520 |
I think 8208 looks pretty darned good, too. That powder has a lot going for it.
"Arguing with you always makes me thirsty." -Augustus McRae
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Re: Faster Burning Powder for Short Barrel?
[Re: RiverRider]
#6520877
11/01/16 02:28 AM
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Joined: Jul 2013
Posts: 2,778
Gone to Texas
OP
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OP
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Re: Faster Burning Powder for Short Barrel?
[Re: Gone to Texas]
#6520899
11/01/16 02:41 AM
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Joined: Nov 2007
Posts: 9,520
RiverRider
THF Trophy Hunter
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THF Trophy Hunter
Joined: Nov 2007
Posts: 9,520 |
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.
"Arguing with you always makes me thirsty." -Augustus McRae
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Re: Faster Burning Powder for Short Barrel?
[Re: Gone to Texas]
#6525565
11/03/16 04:48 PM
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Joined: Dec 2009
Posts: 1,586
ckat
Pro Tracker
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Pro Tracker
Joined: Dec 2009
Posts: 1,586 |
I've got a couple of inches on you  ... 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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Re: Faster Burning Powder for Short Barrel?
[Re: ckat]
#6525746
11/03/16 06:33 PM
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Joined: Jul 2013
Posts: 2,778
Gone to Texas
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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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