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Joined: Jun 2004
Posts: 34,268 Likes: 4
Campfire 'Bwana
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OP
Campfire 'Bwana
Joined: Jun 2004
Posts: 34,268 Likes: 4 |
Holy Crap, I must be doing something wrong! I plugged data in for 10mm Auto and what a shock. I compared QL to published load data and they are not even close.
For example Hornady #7 lists 14.9gr of AA #9 with their 180gr bullets. Quickloads puts this charge at 112,671 PSI.
Here is my QL data. What am I doing wrong?
Cartridge : 10 mm Auto (CIP)
Bullet : .400, 180, Hornady HP/XTP 40040
Cartridge O.A.L. L6: 1.260 inch or 32.00 mm
Barrel Length : 5.0 inch or 127.0 mm
Powder : Accurate No.9
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
-20.0 104 11.92 1235 609 39315 5172 76.0 0.480 !DANGEROUS LOAD-DO NOT USE!
-18.0 107 12.22 1272 647 43139 5364 77.6 0.462 !DANGEROUS LOAD-DO NOT USE!
-16.0 110 12.52 1310 686 47423 5553 79.2 0.443 !DANGEROUS LOAD-DO NOT USE!
-14.0 112 12.81 1349 727 52242 5738 80.7 0.426 !DANGEROUS LOAD-DO NOT USE!
-12.0 115 13.11 1388 770 57684 5918 82.2 0.409 !DANGEROUS LOAD-DO NOT USE!
-10.0 117 13.41 1429 816 63847 6091 83.7 0.393 !DANGEROUS LOAD-DO NOT USE!
-08.0 120 13.71 1470 863 70893 6256 85.2 0.377 !DANGEROUS LOAD-DO NOT USE!
-06.0 123 14.01 1512 914 79010 6412 86.6 0.362 !DANGEROUS LOAD-DO NOT USE!
-04.0 125 14.30 1555 967 88442 6557 88.0 0.347 !DANGEROUS LOAD-DO NOT USE!
-02.0 128 14.60 1600 1023 99515 6689 89.3 0.333 !DANGEROUS LOAD-DO NOT USE!
+00.0 130 14.90 1645 1082 112671 6806 90.6 0.318 !DANGEROUS LOAD-DO NOT USE!
+02.0 133 15.20 1693 1145 128529 6905 91.9 0.305 !DANGEROUS LOAD-DO NOT USE!
+04.0 136 15.50 1742 1213 147978 6983 93.1 0.291 !DANGEROUS LOAD-DO NOT USE!
+06.0 138 15.79 1793 1285 172348 7033 94.3 0.278 !DANGEROUS LOAD-DO NOT USE!
+08.0 141 16.09 1847 1364 203716 7052 95.4 0.264 !DANGEROUS LOAD-DO NOT USE!
+10.0 143 16.39 1904 1450 245524 7031 96.4 0.251 !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 130 14.90 1735 1204 136485 6974 96.3 0.296 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 130 14.90 1534 941 90369 6378 82.2 0.347 !DANGEROUS LOAD-DO NOT USE!
Give a man a fish and he eats for a day. Give a man a welfare check, a forty ounce malt liquor, a crack pipe, an Obama phone, free health insurance. and some Air Jordan's and he votes Democrat for a lifetime.
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Joined: Dec 2000
Posts: 29,348
Campfire Ranger
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Campfire Ranger
Joined: Dec 2000
Posts: 29,348 |
Impossible to guess without knowing all your inputs.
"Good enough" isn't.
Always take your responsibilities seriously but never yourself.
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Joined: Aug 2006
Posts: 99
Campfire Greenhorn
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Campfire Greenhorn
Joined: Aug 2006
Posts: 99 |
You should check the case capacity of your cases. My samples here are really small (Norma brass 24.1 grs water) and probably yours may have a greater case capacity. Some cases I found may hold 26.5 grains of water. For such cases Accurate shows a max load of 13.5 grains AA#9 in their loading book for that Hornady bullet. Because of the case capacity issues the CIP has lowered the maximum pressure to 33000 psi vs SAAMI 37000 psi.
"A stupid man's report of what a clever man says can never be accurate, because he unconsciously translates what he hears into something he can understand." Bertrand Russell
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Joined: Jun 2004
Posts: 34,268 Likes: 4
Campfire 'Bwana
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OP
Campfire 'Bwana
Joined: Jun 2004
Posts: 34,268 Likes: 4 |
Impossible to guess without knowing all your inputs. My inputs are as follows. 10mm Auto 5 Inch Barrel COAL 1.260 case length .990 Bullet weight 180gr Max Case Capacity Overflow 24.00 Powder AA #9 14.9gr Bullet Hornady XTP 40040 Everything else is default program data.
Give a man a fish and he eats for a day. Give a man a welfare check, a forty ounce malt liquor, a crack pipe, an Obama phone, free health insurance. and some Air Jordan's and he votes Democrat for a lifetime.
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Joined: Aug 2003
Posts: 273
Campfire Member
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Campfire Member
Joined: Aug 2003
Posts: 273 |
Straight wall case hot loads not predicted well by QL, as some unburned powder may blow out the muzzle.
The QL instructions state that.
I have incrementally worked up overloads, just to see what gives first, the brass or the gun:
19 Bagder
.223,
6mmBR
.243,
25acp,
257 Roberts AI,
270,
32acp,
32sw,
32S&WLong,
32-20,
7.62x25mm,
7.62x39mm ,
308,
7.62x54R,
8x57mm,
.380,
9x19mm,
9x23mm,
357 Sig,
38 sp,
357 mag,
38sw,
40sw,
10mm,
10.4mm,
45acp,
45Colt,
.410,
45/70
and my personal wild cats
Quickload thinks that many of my straight wall handgun overloads are over 1,000,000 psi and 2200 fps.
But they do not even piercer the primer.
And they certainly do not get 2200 fps on the chrono.
The answer is, they made a big fireball, and QL went the conservative route and estimated what the pressure and velocity would be if the powder burned in the barrel.
The max load for 10mm 180 gr AA#9 is 13.5 gr.
I have shot 15 gr in a stock Glock barrel [with poor case support] and got a feed ramp bulge.
Ramshot Enforcer = AA#9 = H108 = WC820
I have shot 15.5 gr with a 200 gr bullet [all that will fit] in a Barsto barrel with better case support. That load was un eventful.
If you want lots of power out of 10mm, get 800X or Power Pistol, and a well supported barrel.
Better still, get a 40sw barrel with good case support for a 10mm pistol, and take advantage of the stronger 40sw case with small primer pocket.
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