This is my first attempt at loading the 45-70.
The rifle is a Winchester/Miroku 1886.
My question is are they supposed to have rifling marks after being chambered? I have heard these rifles have a short lead. Guess it's true. Question is...is it safe to shoot?
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As long as the boolit is NOT pulled from the case when you cycle the action, you're fine. The cartridges are safe to shoot as they are.
Listen! Do you hear it. The roar of cannons, the screams of the dying! Ahh! Music to my ears!
Thank you Sir. They are in there nice and firm. Never seen this before when reloading for rifles, but, this is my first straight wall case rifle too.
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By having the bullet engaging the lands will most times increase the accuracy when using cast lead boolits. There will be a slight raise in pressure, but that should be ok unless you loaded up some super duper high velocity loads that are max or over max.
Nothing max here! According to Lyman's 49th, these are 1873 Springfield to low end 1886 Winchester loads.
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Brownings have no throat to speak of. At least the several I have dont
if you are not at max, and you aren't ... these should work just fine..
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http://castboolits.gunloads.com/show....php?p=1412368
Chili, what bullet is that. I agree, that should be safe.
Bird, the bullets are from Georgia Arms. They are supposed to 405grs, but weights are from 401 to 406. Instead of several small lybe grooves, these have one big groove.
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As others stated, should be ok with cast boolit. A red flag with copper jacket boolit. And it might be that other boolit designs won't touch. If it bothers you, trim cases a few thousandth shorter.
What lengths did you trim the cases to?
****....I forgot to trim them!Originally Posted by buckshotshoey
Well...when I actually trim cases, they are done to minimum length.
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Just curious, are you at the recommended OAL for that particular bullet? Not trying to give any advice here, just trying to learn something.
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I see they bleeped out in my previous post
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Last edited by runfiverun; 02-21-2017 at 04:02 PM.
These measured 2.514 inches. HSM loads with a comparable bullet are 2.547 inches.
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Yea. The forum algorithm does it automatically. Lol. Off the top of my head, I think the trim to length is 2.095, and max length is 2.105.
I thought it was funny that word got bleeped. I'll check my books when I get home for the COL.
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Cool. Just remember when loading a straight wall cartridge that uses a roll crimp... equal and consistent trim- to length becomes more important for shot to shot consistency.
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FWIW, the max OAL for cycling a cartridge in a Miroku/Winchester 1886/86 is around 2.65/2.66", w/o modification - and they have NO throat, and so are sensitive to boolit profile/design.
Although they can be modified to cycle a cartridge 2.88" long, they will then not cycle shorter cartridges reliably.
IIRC, the SAAMI C.O.L. for the .45-70 is 2.50".
.
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That all y'all for the info. Lyman shows COL to be 2.550. Pietro is darn near spot on! I guess I'll ensure the bext batch is trimmed to 2.105 or 2.100 to see if that eliminates the rifling marks.
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Chili before you change anything, shoot those you have loaded for accuracy test. You might get lucky and end up staying with what you have now. My Marlin 1895 LTD-5 will shoot my 350 gr. cast bullets into a 1 inch group and the load is only about 10 thousands off the lands. You may get lucky with that 1886.
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