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  #1  
Old 02-22-2017, 06:47 PM
Dusty31 Dusty31 is offline
 
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Default Reduced 45-70 loads for trapdoor

Anyone have data for 300 gr. cast bullets using Red Dot, Unique or 2400? Specifically, Trapdoor-safe data.
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  #2  
Old 02-22-2017, 10:07 PM
rcolarco rcolarco is offline
 
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These powders are too fast for the cavernous .45-70 case. By the time you have enough powder in the case for consistent ignition, pressures will be through the roof. Trail Boss makes good low-pressure loads, as do RL-7 and 4198 and 3031.
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  #3  
Old 02-23-2017, 08:22 AM
Dusty31 Dusty31 is offline
 
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Thanks for the feedback, I'm considering Trail Boss.

I found published data for Unique in the 11-14 grain neighborhood, and 2400 in the 21-30 range, but few with pressures around 16000.
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  #4  
Old 02-23-2017, 08:44 AM
jay hall jay hall is offline
 
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look on line and you will find lots data. 5744 is best trail boss looks too hot to me.
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  #5  
Old 02-23-2017, 01:52 PM
Slapshot Slapshot is offline
 
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From an old Lyman reloading handbook (44th Edition), they say 24.0 (1426 fps) to 30.0 (1715 fps) grains of 2400 for use with a 300 grain short jacket bullet. Should be perfectly fine for use with your cast boolit.
Using the same reloading manual, I've used 11 grains (this was their starting load) of Unique with 405 gr. cast boolits with good results.
Per the handbook, these loads are specifically for use with the 1873 Trapdoor.

Last edited by Slapshot; 02-23-2017 at 01:57 PM.
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  #6  
Old 02-25-2017, 07:57 AM
Dusty31 Dusty31 is offline
 
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Quote:
Originally Posted by Slapshot View Post
From an old Lyman reloading handbook (44th Edition), they say 24.0 (1426 fps) to 30.0 (1715 fps) grains of 2400 for use with a 300 grain short jacket bullet. Should be perfectly fine for use with your cast boolit.
Using the same reloading manual, I've used 11 grains (this was their starting load) of Unique with 405 gr. cast boolits with good results.
Per the handbook, these loads are specifically for use with the 1873 Trapdoor.
Slapshot, thanks for the info. Is a filler recommended for those? - Dusty
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  #7  
Old 02-26-2017, 09:36 AM
Slapshot Slapshot is offline
 
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Quote:
Originally Posted by Dusty31 View Post
Slapshot, thanks for the info. Is a filler recommended for those? - Dusty
The reloading handbook never mentions fillers and I've never used fillers in any of my cast boolit loads.
Here is the page from the source:


Last edited by Slapshot; 02-26-2017 at 09:53 AM.
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  #8  
Old 02-26-2017, 08:25 PM
Dusty31 Dusty31 is offline
 
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Thanks!
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  #9  
Old 02-27-2017, 11:20 AM
bigbird bigbird is offline
 
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I use IMR4227 in my 1884 Trapdoor.
IMR4227.......28 grains
405 lead projectile
This load doesn't flatten the primer.
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  #10  
Old 03-06-2017, 09:44 PM
sandhills writer sandhills writer is offline
 
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5744 is probably your best bet. I have talked to the factory reps several times about different 45-70 loads. They can give you a ton of info, and are great to work with
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