CAUTION: The following post (or a page linked to) includes or discusses loading data not covered by currently published sources of tested data for this cartridge (QuickLOAD or Gordon's Reloading Tool data is not professionally tested). USE AT YOUR OWN RISK. Neither the writer, The Firing Line, nor the staff of TFL assumes any liability for any damage or injury resulting from the use of this information.
P Flados said:
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Note that I would not expect good results with plated bullets pushed too fast. Otherwise, they should work fine for plinking use.
I did not see a barrel length. I guessed 20" for a lever gun & asked Quickload to give me a table of charges vs. velocity. Note also I used a cast bullet as QL does not have the bullets used by the OP.
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Cartridge : .35 Rem.
Bullet : .358, 125, LEE 358-125-RF
Useable Case Capaci: 46.258 grain H2O = 3.003 cm³
Cartridge O.A.L. L6: 2.250 inch = 57.15 mm
Barrel Length : 20.0 inch = 508.0 mm
Powder : IMR TrailBoss
Predicted data by increasing and decreasing the given charge,
incremented in steps of 4.167% of a 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
[COLOR="Red"]-41.7 49 7.00 1187 391 7767 864 100.0 2.118
-37.5 52 7.50 1234 423 8649 918 100.0 2.030
-33.3 56 8.00 1280 455 9571 972 100.0 1.950
-29.2 59 8.50 1323 486 10533 1025 100.0 1.878
-25.0 63 9.00 1366 518 11532 1079 100.0 1.812
-20.8 66 9.50 1407 549 12570 1132 100.0 1.745[/COLOR]
-16.7 70 10.00 1447 581 13645 1184 100.0 1.681
-12.5 73 10.50 1486 613 14756 1237 100.0 1.623
-08.3 77 11.00 1524 644 15904 1289 100.0 1.570
-04.2 80 11.50 1561 676 17088 1340 100.0 1.521
+00.0 84 12.00 1597 708 18307 1391 100.0 1.476
+04.2 87 12.50 1633 740 19563 1442 100.0 1.434
+08.3 90 13.00 1667 772 20855 1493 100.0 1.395
+12.5 94 13.50 1702 804 22183 1543 100.0 1.359
+16.7 97 14.00 1735 836 23547 1593 100.0 1.325
[COLOR="red"]+20.8 101 14.50 1768 868 24948 1642 100.0 1.293[/COLOR]
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 84 12.00 1607 717 19878 1379 100.0 1.437
Data for burning rate decreased by 10% relative to nominal value:
-Ba 84 12.00 1584 696 16511 1408 100.0 1.528
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Note that some of those go outside the range Hodgdon specifies for TrailBoss rifle loads. Nothing below 70% loading density and nothing above 100% loading density. The instructions are in the paragraphs before the table
here. So, 10 grains to 14.3 grains, assuming QuickLOAD's bulk density matches the lot you buy.
Please note that we now require the standard warning to be inserted when posting QuickLOAD or Gordon's Reloading Tool results. Those low loads and the slightly compressed one, which Hodgdon says should not be used with this powder, are examples of why. I have put the warning into the original post.
I would not get excited about exceeding recommended velocities. They are specific to the bullet's most common applications, which, for a 125-grain 0.357" bullet will be 38 and .357 revolvers with barrels in the 4 to 6-inch range. What actually causes trouble for a soft bullet is too much pressure. The maker should, IMHO, give a maximum peak pressure but know most people can't measure that, so they don't. But they could give you a barrel length associated with the velocity limit they recommend, so you can figure out what is typical for it.
The late Richard Lee went into some detail documenting the effect of deformation levels of pressure on rifle accuracy (Lee's Modern Reloading, Second edition, Chapter 10, pp 129-139), and his system of choosing an appropriate pressure (less a 10% safety margin) practically speaking, boils down to multiplying the bullet BHN by 1280 to get a maximum pressure to load to.
Within limits, the velocity produced by a load will increase with barrel length. The fact the resulting velocity exceeds the one the manufacturer provides for the bullet doesn't mean the bullet can't take it. It just means you aren't using it in its commonly expected firearm type.