pharmseller
Handloader
- Feb 13, 2012
- 554
- 90
Can someone run the calculation for a T3 7mm-08 (22 7/16" barrel), 120 TTSX, WLRM, 2.805" using CFE223?
Thanks,
P
Thanks,
P
Quickload help, 7mm-08
- Thread starter pharmseller
- Start date
http://www.barnesbullets.com/files/2014 ... gtonV6.pdf
QL works best if you include actual internal capacity of a fired case in grains of H20.
QL works best if you include actual internal capacity of a fired case in grains of H20.
- Thread starter
- #3
pharmseller
Handloader
- Feb 13, 2012
- 554
- 90
I'm using Remington brass.
Any quickloaders out there?
Thanks,
P
Any quickloaders out there?
Thanks,
P
Gunner46
Handloader
- Jan 12, 2015
- 483
- 4
Looking through my reloading data book, I found RL-15 got some hole touching groups and at published velocities. Those were with R-P Brass, but with Win standard primers. Never tried CFE. I tend to stick to my three go to's in a 308 based cartridge. Varget, RL-15, or 4064.
My Quickload program is a version or two old and doesn't have cfe223 in there. This is a hillbilly cross reference but I see in my latest Hornady manual they say you can go up to 50 grains with Mr 2000. And I see barnes stops at 47 grains. The Hornady manual does not have cfe223 in there. Either the Barnes bullet is sticky which I doubt or they're just a hair conservative. If it were me I might dabble moving up a little bit from Barnes max load of cfe223 if I didn't hit the velocity I thought I should have. I see Hogdon Online is calling for 49.5 CFE 223.
I've got a new Lyman manual coming to my doorstep and a new Hodgdon manual if they show some CFE loads I'll list them.
I've got a new Lyman manual coming to my doorstep and a new Hodgdon manual if they show some CFE loads I'll list them.
DrMike
Ballistician
- Nov 8, 2006
- 37,532
- 6,585
Cartridge : 7 mm-08 Rem.
Bullet : .284, 120, Barnes 'TTSX'BT 30298
Useable Case Capaci: 48.043 grain H2O = 3.119 cm³
Cartridge O.A.L. L6: 2.805 inch = 71.25 mm
Barrel Length : 22.4 inch = 569.9 mm
Powder : Hodgdon CFE223
Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% 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
-20.0 75 37.20 2465 1619 31268 7530 90.3 1.310
-18.0 77 38.13 2524 1698 33252 7764 91.5 1.278
-16.0 79 39.06 2584 1779 35372 7991 92.6 1.267
-14.0 81 39.99 2643 1861 37636 8210 93.7 1.233
-12.0 83 40.92 2702 1946 40057 8421 94.6 1.201
-10.0 85 41.85 2762 2033 42644 8621 95.6 1.170
-08.0 87 42.78 2822 2121 45415 8810 96.4 1.139
-06.0 89 43.71 2881 2212 48383 8988 97.1 1.110
-04.0 90 44.64 2941 2304 51563 9153 97.8 1.080 ! Near Maximum !
-02.0 92 45.57 3000 2398 54979 9305 98.4 1.050 ! Near Maximum !
+00.0 94 46.50 3059 2494 58647 9442 98.9 1.020 ! Near Maximum !
+02.0 96 47.43 3118 2591 62593 9565 99.3 0.991 !DANGEROUS LOAD-DO NOT USE!
+04.0 98 48.36 3177 2689 66835 9671 99.6 0.964 !DANGEROUS LOAD-DO NOT USE!
+06.0 100 49.29 3236 2790 71425 9761 99.8 0.937 !DANGEROUS LOAD-DO NOT USE!
+08.0 102 50.22 3294 2891 76354 9833 100.0 0.911 !DANGEROUS LOAD-DO NOT USE!
+10.0 104 51.15 3352 2994 81642 9888 100.0 0.886 !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 94 46.50 3194 2718 70415 9157 100.0 0.948 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 94 46.50 2874 2200 47930 9233 93.4 1.110
Bullet : .284, 120, Barnes 'TTSX'BT 30298
Useable Case Capaci: 48.043 grain H2O = 3.119 cm³
Cartridge O.A.L. L6: 2.805 inch = 71.25 mm
Barrel Length : 22.4 inch = 569.9 mm
Powder : Hodgdon CFE223
Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.0% 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
-20.0 75 37.20 2465 1619 31268 7530 90.3 1.310
-18.0 77 38.13 2524 1698 33252 7764 91.5 1.278
-16.0 79 39.06 2584 1779 35372 7991 92.6 1.267
-14.0 81 39.99 2643 1861 37636 8210 93.7 1.233
-12.0 83 40.92 2702 1946 40057 8421 94.6 1.201
-10.0 85 41.85 2762 2033 42644 8621 95.6 1.170
-08.0 87 42.78 2822 2121 45415 8810 96.4 1.139
-06.0 89 43.71 2881 2212 48383 8988 97.1 1.110
-04.0 90 44.64 2941 2304 51563 9153 97.8 1.080 ! Near Maximum !
-02.0 92 45.57 3000 2398 54979 9305 98.4 1.050 ! Near Maximum !
+00.0 94 46.50 3059 2494 58647 9442 98.9 1.020 ! Near Maximum !
+02.0 96 47.43 3118 2591 62593 9565 99.3 0.991 !DANGEROUS LOAD-DO NOT USE!
+04.0 98 48.36 3177 2689 66835 9671 99.6 0.964 !DANGEROUS LOAD-DO NOT USE!
+06.0 100 49.29 3236 2790 71425 9761 99.8 0.937 !DANGEROUS LOAD-DO NOT USE!
+08.0 102 50.22 3294 2891 76354 9833 100.0 0.911 !DANGEROUS LOAD-DO NOT USE!
+10.0 104 51.15 3352 2994 81642 9888 100.0 0.886 !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 94 46.50 3194 2718 70415 9157 100.0 0.948 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 94 46.50 2874 2200 47930 9233 93.4 1.110
Well...geez.... about a year ago I picked up a new Thompson venture in 7 mm 08. When it came I didn't have any brass and couldn't find any locally so I necked up some 243 Winchester. I made up about 7 or 8 test batches of about 4-5 rounds each and headed to the range. That was a year ago so I didn't remember what all I did. I just went down and checked my load data and found I had actually run a 120 ballistic tip w/46.0 CFE233. My notes say I used a WLR primer and velocity was 2935 and it was terrifically accurate.
Here's more hillbilly extrapolation... there is some internet fodder that cfe223 is actually a modified version of bLC 2. Whenever I shot cfe223 in other cartridges it matched up real well on quick load with BLC 2. Like I said earlier my version of quick load doesn't have cfe223 but I just ran it with 46 grains of BLC 2 and it said I would do 2934 fps at 51 k pressure. It was a perfectly dead on match for what happened in my gun.
Using the step-up chart in quick load I should be able to move up to 48.9 grains doing 3112 fps @ 62 k pressure with the same layout. Whether or not the BT is going to make significantly more or less pressure than the TTSX is a crap shoot. My venture doesn't have much free bore..... most tikkas do allowing them to use a little more powder... but I'm guessing a Winchester case verses rem case might be worth about 1 grain to.
Bottom line if I were you I would go to the range with 46 grains under that 120 TTSX and cronograph it and then we can modify quick load the see where you can go from there.
Here's more hillbilly extrapolation... there is some internet fodder that cfe223 is actually a modified version of bLC 2. Whenever I shot cfe223 in other cartridges it matched up real well on quick load with BLC 2. Like I said earlier my version of quick load doesn't have cfe223 but I just ran it with 46 grains of BLC 2 and it said I would do 2934 fps at 51 k pressure. It was a perfectly dead on match for what happened in my gun.
Using the step-up chart in quick load I should be able to move up to 48.9 grains doing 3112 fps @ 62 k pressure with the same layout. Whether or not the BT is going to make significantly more or less pressure than the TTSX is a crap shoot. My venture doesn't have much free bore..... most tikkas do allowing them to use a little more powder... but I'm guessing a Winchester case verses rem case might be worth about 1 grain to.
Bottom line if I were you I would go to the range with 46 grains under that 120 TTSX and cronograph it and then we can modify quick load the see where you can go from there.
pharmseller":383r9xjk said:
Brand of brass is not what is needed. Case capacity is.
Weigh a fired case.
Fill with H20
Weigh it again and subtract, that is your case capacity in grains of H20.
QL has a default capacity for all listed cartridges, sometimes it is spot on, sometimes not. It's best (more accurate) if we plug in actual case capacity.
