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Rifles, Reloading, Optics, Equipment
Reloading
.45-70 Question
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<blockquote data-quote="300RUM LNGRNGE" data-source="post: 1170707" data-attributes="member: 38737"><p>I know this is a old thread, and I apologize for but it seems that this would be the place to have my questions answered.</p><p>I have a sharps 45-70 . 32 inch 1:18 twist. Want to shoot BP and have been doing a lot of research on the subject.</p><p>What I don't understand is that with a 500 gr bullet and a .060 cardboard wad, there is a need to compress the powder.</p><p>My understanding is that the only difference between FFg powder and FFFg powder is granule size. </p><p>Everything I read on load data is compressed FFg run down through a 24 inch drop tube. Upon compressing FFg , are we not smashing granule size?</p><p>In loading 70ish grains of FFFg powder, this will also need to be slightly compressed, but not as much since it settles in the casing lower. </p><p>In compressing FFg so far, is it not getting compressed into FFFg and tighter?</p><p>Why then is everyone using FFg?</p><p>I have heard that FFFg will have higher pressure, but black powder is black powder. So wouldn't 70 grain of either by weight, not by volume, produce the same pressure especially when compressed to the same volume?</p><p>I am not trying to say that everyone else is wrong, nor am I trying to re-invent the wheel, just trying to wrap my brain around this.</p></blockquote><p></p>
[QUOTE="300RUM LNGRNGE, post: 1170707, member: 38737"] I know this is a old thread, and I apologize for but it seems that this would be the place to have my questions answered. I have a sharps 45-70 . 32 inch 1:18 twist. Want to shoot BP and have been doing a lot of research on the subject. What I don't understand is that with a 500 gr bullet and a .060 cardboard wad, there is a need to compress the powder. My understanding is that the only difference between FFg powder and FFFg powder is granule size. Everything I read on load data is compressed FFg run down through a 24 inch drop tube. Upon compressing FFg , are we not smashing granule size? In loading 70ish grains of FFFg powder, this will also need to be slightly compressed, but not as much since it settles in the casing lower. In compressing FFg so far, is it not getting compressed into FFFg and tighter? Why then is everyone using FFg? I have heard that FFFg will have higher pressure, but black powder is black powder. So wouldn't 70 grain of either by weight, not by volume, produce the same pressure especially when compressed to the same volume? I am not trying to say that everyone else is wrong, nor am I trying to re-invent the wheel, just trying to wrap my brain around this. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
.45-70 Question
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