Loads for 45-70 MAUSER (strong action), help please?

[cpileri]

Loads for 45-70 Mauser

Warning: these loads are for strong actions, Ruger No 1's Mauser actions etc and far exceed safe loads in other 45-70 chambered guns.

Dear Sirs and Ma'ams,
I am working on loads for a 45-70 Mauser, and wouldlike your advice, suggestions, analysis, etc on one that eludes me.

I am trying to achieve 2100fps from a 350gr load (barnes TSX, FWIW) and have some published data in the 40Kpsi range that gets to ~1950fps. Might seem plenty but i am attempting a ballistic match to a +/-3 inch battle sight zero (BSZ) out to abt 150yds. So I need 2100fps, approximately.

I have published loads for a 500gr jacketed bullet (Hornady DG) that gets to 1900fps, and am wondering if these powders will get me to 2100fps w the 350gr.
For example:

45-70 Mauser, 350gr TSX
Powder: IMR SR 4759: 35gr= 1900fps, and 37gr= 1969fps
IMR 4227: 40.5gr= 1964fps

vs.
45-70 Mauser, 500gr DG
IMR -4198: 48gr= 1818fps
IMR 3031: 57gr= 1877fps

Would Quickload give me a psi and velocity number using the 500gr powder and charge, without changes, but seating the 350gr bullet? Of note, the 57gr 3031 charge is compressed w the 500gr bullet, but wont be w the 350gr. usually that makes me feel safer, but i woudl like some learned analysis.

many thanks!
C-

 

[ArchAngelCD]

Hodgdon lists 45-70 load data in 3 different pressure limits. They supply Trapdoor load data, Levergun load data and loads listed for Modern Rifles. Those loads claim 2143 fps to 2300 fps. I'm sure you can find a load that is accurate and generates the velocity you're looking for what a 350gr bullet. There are even 4 loads in the Levergun data which exceed 2100 fps.
http://www.hodgdonreloading.com/data/rifle
I would give H4198 a try or even IMR3031 which I also sometimes use with jacketed bullets.

Please keep up updated on your progress...

 

[cpileri]

thanks for the link;
here's something I can use (my shoulder hurts thinking about it!)


350gr bullet Hodgdon H322 52.0gr 1,898fps 25,800 CUP
350gr bullet Hodgdon H322 57.0grC 2,143fps 41,100 CUP

350gr bullet Hodgdon H4198 50.5gr 2,104fps 35,100 CUP
350gr bullet Hodgdon H4198 56.0gr 2,300fps 50,000 CUP

Wow!
C-

 

[ArchAngelCD]

I think you will get better results with H4198 than H322 but you never know in your gun until you try. Don't beat yourself up, start low and stop when you achieve the velocity you're looking for. I have a feeling that will happen before you reach the shoulder break pressures! lol (I hope you have access to a Chrono because the published velocities are rarely correct in real life shooting)

 

[bfoosh006]

H322 is very accurate in my Browning 1886.

Just sayin'.

 

[Kurastduuks]

2100 fps doesnt seem very outlandish or difficult what so ever with a 350gr projectile. When I first began handloading I was pushing a 405 at near that out of a lever gun with 4064, even took a nice bear with that very misguided and painful load...still have the flinch to prove it.

 

[AbitNutz]

I have a Siamese Mauser in 45/70 and you can load it really, really close to a 458 magnum. Why, I'm not sure but you can. The only way I was able to make sure things were where they were supposed to be was by using a chronograph. Buy, borrow or beg one otherwise you'll never really know. My Siamese Mauser has an 18" barrel so it's a little low on speed. It seems most data assumes it has a 22 or better barrel which makes a big difference with slow burning powder.

 

[greenmtnguy]

My long range deer hunting load for my Marlin 1895 uses the 300 grain Hornady bullet with 55.8 grains of H322. It is very accurate and 2100 FPS MV from my rifle's 22" barrel. It will also get your attention when you shoot it..