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Rifles, Reloading, Optics, Equipment
Reloading
45-70 Bullets Keyholing
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<blockquote data-quote="Lefty7mmstw" data-source="post: 768846" data-attributes="member: 48043"><p>The above advice is very sound. </p><p>I'll toss something else into the pie here, though. With cast bullet shooting you do not shoot for velocity at all, but for the pressure that gets your bullet to perform properly in your rifle bore. You want full obduration without destroying the alloy and causing leading. The harder the alloy, the faster it can go as it can take more pressure, to a point. You want to go from an extremely mild load and push the load until the accuracy comes in and then goes away. Back the load down until you have accuracy and you have your charge. Do not change your alloy without re-working the load.</p><p> </p><p>You may get as little as 1400 fps accurately with some alloys, and you may get 2000 fps as I do with my 375. I am not quite sure where I am landing yet with my 405 and lead, but I'm aiming for somewhere in the 2000-2200 fps range at 2 moa or less from its blade sights.</p><p> </p><p>As far as the rifle in question, clean it with hoppes and a good bronze brush. Then after making sure your diameters are compatible with the bullet about a .001" bigger than the bore, start from a charge that'll give 1000 fps or so and work up. You may need to work with more than one powder (the preferred powder for cast in my 405 is 4895- my rifle shoots shotgun patterns with it- I had to go to rl7 to get ithe rifle to start grouping). Also, never use a swaged bullet in a rifle; they just aren't tough enough. Hard cast is the way to go unless you are using very mild loads.</p></blockquote><p></p>
[QUOTE="Lefty7mmstw, post: 768846, member: 48043"] The above advice is very sound. I'll toss something else into the pie here, though. With cast bullet shooting you do not shoot for velocity at all, but for the pressure that gets your bullet to perform properly in your rifle bore. You want full obduration without destroying the alloy and causing leading. The harder the alloy, the faster it can go as it can take more pressure, to a point. You want to go from an extremely mild load and push the load until the accuracy comes in and then goes away. Back the load down until you have accuracy and you have your charge. Do not change your alloy without re-working the load. You may get as little as 1400 fps accurately with some alloys, and you may get 2000 fps as I do with my 375. I am not quite sure where I am landing yet with my 405 and lead, but I'm aiming for somewhere in the 2000-2200 fps range at 2 moa or less from its blade sights. As far as the rifle in question, clean it with hoppes and a good bronze brush. Then after making sure your diameters are compatible with the bullet about a .001" bigger than the bore, start from a charge that'll give 1000 fps or so and work up. You may need to work with more than one powder (the preferred powder for cast in my 405 is 4895- my rifle shoots shotgun patterns with it- I had to go to rl7 to get ithe rifle to start grouping). Also, never use a swaged bullet in a rifle; they just aren't tough enough. Hard cast is the way to go unless you are using very mild loads. [/QUOTE]
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45-70 Bullets Keyholing
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