.45/70 Reloading with Trailboss

[pbrazendale]

Hi all,

New Henry chambered in .45/70 arriving Wednesday, looking at loading up some rounds using Trail boss for indoor gallery use.

I’ve got GM 405gr bullets and starline brass cases, using large rifle primers does anyone have any recommended loads with Trail Boss?

It’s not listed in my Lyman 50th so thought I’d ask for recommendations, also as it’s being used in a lever gun is it a good idea to factory crimp like I do for my .357?

Thanks all


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[dromia]

I would look up IMR's own data as a starting point, it is on the netty.

[Sim G]

What's your indoor ranges safety specs? Most, if ratified by the NSRA, will have a ME limit decreed at 475ft/lbs maximum. A very modest sub sonic load of 900fps with a 405gn bullet will give almost 730ft/lbs....

[TomH]

Yes, crimp your rounds as per your 357 and don't use pointy bullets in a tubular magazine.

[pbrazendale]

Sim, maximum MV for all powders is 1706 ft/s and maximum ME for all powders is 1045 ft/lbs so as long as I’m within that then no issues.


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[pbrazendale]

I’ve had a look on the IMR website but .45/70 isn’t listed under Trail Boss loads it goes to a max calibre of .416 Rem Mag.


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[Laurie]

Go to the Hodgdon Reloading Center menu driven website

http://www.hodgdonreloading.com

Use the drop down cartridge menu and select 45-70 and click Hodgdon powders and your bullet weight. (Specify 'Hodgdon' propellants, not 'IMR' for some reason.)

The 'Trapdoor Springfield' dataset for a 405gn cast LFP and Trail Boss is starting load 12.0gn for 971 fps, maximum 13.0gn for 1,007 fps from a 24-inch barrel. Both loads' MEs are under 1,000 ft/lb.

If you like TB, get a supply in quick - there will be no more imported after early 2018 thanks to REACH.

[dromia]

.45-70 Government (IMR Rifle Trail Boss Data)
.45-70 Government (IMR Rifle Trail Boss Data)
Warning! Notes: case: Winchester; twist: 1:20"; barrel: 24" trim: 2.100"; primer: CCI 200; dia.: .458"; COL: 2.465"; DO NOT USE ANY FILLER MATERIAL WITH THESE LOADS, as fillers can alter pressure and velocities decidedly; never exceed loads listed
Be Alert: Publisher cannot be responsible for errors in published load data.
Wt. Bullet Powder Manufacturer Powder Charge Velocity (FPS) Favorite?
300 cast LFP IMR Trail Boss 14.0 1,199
Remarks: starting load; 14,400 cup
300 cast LFP IMR Trail Boss 16.5 1,285
Remarks: maximum load; 20,900 cup
405 LRNFP IMR Trail Boss 12.0 971
Remarks: starting load; 24,500 cup
405 LRNFP IMR Trail Boss 13.0 1,007
Remarks: maximum load; 25,600 cup


IMR data from Load Data

[pbrazendale]

Thanks guys


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[Pesty]

I use 13 grains of trail boss from memory for a nice easy shooting load with magnum primers.