Large Rifle Magnum primers in 45/70?

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Jayhawkhuntclub

Buckeye
Joined
Aug 28, 2007
Messages
1,085
I assume there is no issue with me using LRM primers with Unique or Trailboss in 45/70 (marlin). The load does not call for a magnum primer. I know I've done this with 44 mags and never had an issue.
 

drew76

Bearcat
Joined
May 15, 2009
Messages
78
I've done it and had no issues. They shot fine. Of course, like any change of component calls for, start low and work your way up. Your pressures will be higher with with the mag primers than the standard ones so be aware of that.
 

Old Judge Creek

Single-Sixer
Joined
Nov 1, 2001
Messages
320
I wouldn't put a cartridge with either of those powder combos over a magnum primer in one of my rifles and I've been reloading since the mid 1950s - but that's just me.

My life long rule has been: If I can''t find the load documented in a book, I don't need to press my luck.

There're plenty enough loads and components tried and tested as safe for me to be gambling that I know more than the guys that load and scientifically test load combinations for a living.
 

redsouthpaw

Bearcat
Joined
Dec 20, 2007
Messages
66
I've used them with 4895 with good results.
When loading with unique I use large pistol primers. The pistol powders burn too fast to need a magnum primer.
 

Bucks Owin

Hunter
Joined
Mar 22, 2004
Messages
3,190
Why would you want to? Availability? It's certainly not needed...Just curious, Dennis
 

Jayhawkhuntclub

Buckeye
Joined
Aug 28, 2007
Messages
1,085
Bucks Owin":9u9ny814 said:
Why would you want to? Availability? It's certainly not needed...Just curious, Dennis

Because I sold my 300 Win mag and I want to use the primers. Actually, I already loaed some up. I ended up with 4198 instead of the powders I mentioned.
 

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