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Rifles, Reloading, Optics, Equipment
Reloading
To slug or not for Cast bullets
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<blockquote data-quote="Lefty7mmstw" data-source="post: 911403" data-attributes="member: 48043"><p>A couple of things that haven't been covered here. Most cast bullets require you to load to a certain pressure level to get the bullet to obturate; ie. swell to bore diameter and fill the bore. </p><p>Bullets shot too slow or fast will lead much more than bullets loaded at correct velocity for the powder/ bullet combo. If you need to change your projectile speed, change to either a faster or slower powder depending on your needs. Faster powders will build to higher pressures at slower delivered speed and slower powders will give you more speed before you get to pressure. </p><p>You need to run your loads from just above squib and go up until you find/surpass the sweet spot and then settle on a safe charge within the sweet spot. This is much more critical in my rifles running cast pills where I want to get to 1-1.5 moa at worst, but I run the loads up in a pistol too.</p><p>Reloading for an auto pistol with lead bullets also has another issue that hasn't been touched on and is rather singular to autos. You need to keep your bullet within .001" or so of factory bullet diameter in an auto as your chamber likely won't allow chambering of oversized rounds. It headspaces on the lip of the case mouth, so they don't make that part of the chamber oversized. Try for more than a thou. over and you'll likely be jamming partially chambered rounds at worst and getting poor cycling and wacking the tail of the slide to seat the round at best.</p></blockquote><p></p>
[QUOTE="Lefty7mmstw, post: 911403, member: 48043"] A couple of things that haven't been covered here. Most cast bullets require you to load to a certain pressure level to get the bullet to obturate; ie. swell to bore diameter and fill the bore. Bullets shot too slow or fast will lead much more than bullets loaded at correct velocity for the powder/ bullet combo. If you need to change your projectile speed, change to either a faster or slower powder depending on your needs. Faster powders will build to higher pressures at slower delivered speed and slower powders will give you more speed before you get to pressure. You need to run your loads from just above squib and go up until you find/surpass the sweet spot and then settle on a safe charge within the sweet spot. This is much more critical in my rifles running cast pills where I want to get to 1-1.5 moa at worst, but I run the loads up in a pistol too. Reloading for an auto pistol with lead bullets also has another issue that hasn't been touched on and is rather singular to autos. You need to keep your bullet within .001" or so of factory bullet diameter in an auto as your chamber likely won't allow chambering of oversized rounds. It headspaces on the lip of the case mouth, so they don't make that part of the chamber oversized. Try for more than a thou. over and you'll likely be jamming partially chambered rounds at worst and getting poor cycling and wacking the tail of the slide to seat the round at best. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
To slug or not for Cast bullets
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