JimGnitecki
Member
- Joined
- Mar 28, 2010
- Messages
- 1,258
Jim, With the low percent fill of your specific combination the pressure will not go up that much.
Code:Cartridge : .357 Magnum (SAAMI) Bullet : .358, 158, Hornady SWC 10408 Barrel Length : 6.5 inch = 165.1 mm Powder : Hodgdon TiteGroup Cartridge O.A.L. L6: 1.580 inch = 40.13 mm Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time % % Grains fps ft.lbs psi psi % ms +00.0 34 4.00 896 281 16651 2157 100.0 0.890 +25.0 43 5.00 1022 367 24635 2622 100.0 0.744 Cartridge O.A.L. L6: 1.517 inch = 38.53 mm Step Fill. Charge Vel. Energy Pmax Pmuz Prop.Burnt B_Time % % Grains fps ft.lbs psi psi % ms +00.0 38 4.00 917 295 18869 2097 100.0 0.850 +25.0 48 5.00 1046 384 28182 2544 100.0 0.711
Wow, that IS a very modest peak pressure increase, from 16651 psi to 18869 psi (only 13% increase), which is still far short of the psi a REAL 357 Magnum cartridge develops.
This is also something i could try while waiting for my larger diameter powder station expander funnel and the Lee Factory Crimp die.
Another potential advantage is that it will likely raise the muzzle velocity a bit, which gives me a new additional data point to supplement the recent ladder test.
Thank-you, P Flados!
Note that the muzzle velocity in the above Quick Load simulation dony P Flados for my benefit is far higher than my actual. This simulation says that at 4.0g of TiteGroup, with a 6.5" barrel, QL says I would get 896 fps. But with my 4.75" barrel, admittedly sorter, I actually consistently get an average of 770 fps. QL also says that the muzzle velocity will increase only from 896 to 917 fps. So, no danger of driving that swaged bullet too fast and encountering leading.
Jim G