45-70 350Grain load data???

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Cameron300

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Hello
I’m looking to get load data for 45-70 350 grain RNFP BB bullets from the bullet barn
I have a marlin 1895 if that matters
I can’t find any data for lead bullets in my books
I have Hornady and Winchester cases
Any info or links would be great
Thanks
 
You can use jacketed bullet data with cast. Also you can look at the trapdoor loads on hodgson website aswell that will have cast bullets listed. If you use jacketed bullet data with cast, you get a little lower pressure and a little higher fps. If its microgrove barrel, dont push cast to hard.
Just start at min and work you way up.
 
The Hodgdon Reloading site will serve as a useful guide. Go to the section on 'Trapdoor Springfield' 45-70 reload data. Refer to the minimum loads for 385 grain lead bullets, to start. This data should be plenty close enough for your needs. Personally, I prefer IMR 3031. But, IMR 4198 is always a good choice. Others may have their own preferences. Your rifle may prefer others, too. If you have access to a chronograph, all the better. Then work up your loads to suit your rifle/accuracy/velocity goals.
 
Evanguy said:
You can use jacketed bullet data with cast. Also you can look at the trapdoor loads on hodgson website aswell that will have cast bullets listed. If you use jacketed bullet data with cast, you get a little lower pressure and a little higher fps. If its microgrove barrel, dont push cast to hard.
Just start at min and work you way up.
Click to expand...

using jacketed data for cast is a good way to get leading
 
From Lyman 49 for Marlin 1895

I personally love RL7 for cast bullet loads for the 45-70 These loads are for the 330 grain cast bullet but will work with a 350 if you start at the starting load.


330_cast _45-70.jpg
 

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Go on this forum castboolits.com lots of knowledgeable guys on there. With Marlins and micro-groove rifling, bullets need to be harder and a couple thousands of an inch over groove dia or you will not get decent accuracy.Micro-groove can shoot cast it's just a little particular.
 
antiqueguy said:
using jacketed data for cast is a good way to get leading
Click to expand...

Its possible, but proper bullet fitment goes along way. Also the min loads listed for the jacketed data is normaly pretty close to the max load for the cast. And thats not due to pressure reasons its the velocity. Keep it under 2k fps and you should be good with bigbore plane base bullets

Also if you know the powder or its something like imr3031, h4895, 5744 you can use 10% below min and work up.
 
Ken Waters Pet loads 393gr Ohaus cast so this data is safe with a 350gr bullet and you can scooch up a grain or two and check for signs of pressure/accuracy[31gr IMR4198/fine load in Marlin 1895 and 38.5gr of IMR 3031 good load in Marlin 1895]
 
Myself I find anything approaching a stiff handload 45-70 with any of the IMR "4" powders starting to get a bit uncomfortable in recoil energy versus and incremental gains in velocity.

I found IMR-3031 much more accurate without abuse. And Reloader 7 best for velocity gains without punishment.

my two bits only
 
If you ever decide to go jacketed in your Marlin I get .504" 3 shot groups at 100 yards with a Hornady 350grFN /44gr of IMR 4198 and .536" with a Hornady 300gr HP and 54gr of IMR 3031.4x Leupold scoped due to eyesight.
 
I shoot single shot buffalo style rifles using a 350 grain lead bullet, driven by 15.5 grains of Trail Boss and find it pleasant to shoot.
Varget gives sharper recoil for me.
 
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