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Author Topic: 45/70 same bullet  (Read 1056 times)

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Offline jro45

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45/70 same bullet
« on: October 29, 2008, 02:11:47 AM »
doesn't the 45/70 shoot the same DIA. bullet that the 458 shoots or is it different?
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Offline bilmac

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Re: 45/70 same bullet
« Reply #1 on: October 29, 2008, 02:54:43 AM »
45 rifles all use 458s as far as I know. Handguns get more complicated, some using 451s and others 454s but I think that modern guns are becoming more standardized.
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Offline Larry Gibson

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Re: 45/70 same bullet
« Reply #2 on: October 29, 2008, 06:09:57 AM »
Commercial barrel groove diameter has always been .457/.458 for the 45-70. However original trapdoor barrel groove diameters ran from .459 to .465 (some reported as larger) with most being in the .460 to .462 range. 

Larry Gibson
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Offline BUFFALOW red

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Re: 45/70 same bullet
« Reply #3 on: November 02, 2008, 02:29:13 PM »
my H&R trap door little big horn edition slugs at .459
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Offline efremtags

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Re: 45/70 same bullet
« Reply #4 on: November 02, 2008, 02:37:59 PM »
It's the same nominal diameter, but bullets tend to not be interchangeable as jacket thickness for 458WM is heavier, and will not deform at 45/70 velocity, vice versa, 45/70 bullets will frag at 458WM velocity.
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