SIGforum
Reloading powder for .45-70 and .303 British

This topic can be found at:
https://sigforum.com/eve/forums/a/tpc/f/630601935/m/3980056094

March 26, 2022, 08:41 AM
PCWyoming
Reloading powder for .45-70 and .303 British
What powder(s) are you using for your .45-70 (I assume cast bullets)?


What powder(s) are you using for your .303 British?

PC
March 26, 2022, 08:46 AM
Jimbo54
There is a reloading sub-forum here. Ask there.

Jim


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March 26, 2022, 01:57 PM
Black92LX
https://sigforum.com/eve/forum...0601935/m/8860070884


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March 26, 2022, 06:03 PM
357fuzz
If you are using cast in either caliber Accurate 5744. Excellent powder for .45-70 it started life out as a black powder substitute. If you want cast light mouse fart loads in either caliber that are accurate use Unique. Red Dot is a super light load in cast bullets in .303 that is accurate. I don’t know w/ confidence if you can use Red Dot or IMR4227 in a .45-70. In a modern rifle it would probably work safely but, do your own checking. Unique and 5744 are for to go in a Trapdoor.

The same powder in both calibers using jacketed bullets I don’t have an answer for you, sorry.
March 26, 2022, 10:38 PM
mod29
IMR4198 for 45-70
March 27, 2022, 08:59 AM
IndianaBoy
You best option in the time of this powder shortage is to go to the powder manufacturers website, pull up their data for each of those cartridges.


Make a list of the powders that they recommend, and then go shopping to see what you can find in stock.

It is likely that you will be forced to use an acceptable powder, and not an optimal powder, because of the current shortage of reloading components.
March 27, 2022, 03:08 PM
tacfoley
quote:
Originally posted by mod29:
IMR4198 for 45-70


I shoot 34gr of IMR4198 and a 405gr HC bullet in my Uberti long-range High Wall replica. A few people I know at our club do more or less the same for their Sharps rifles.
March 28, 2022, 11:56 AM
Anubismp
I've done IMR4064 with acme coated 405grn and that's worked for my 45/70 needs. I typically try to replicate the old cavalry load though my guns can take the lever loads.
April 01, 2022, 06:58 PM
Gustofer
quote:
Originally posted by mod29:
IMR4198 for 45-70

Same here. In a pinch I'll use Unique, but I prefer the former.


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