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Tennessee Gun Owners Forums
Muzzleloader
Bullet not stabilizing
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<blockquote data-quote="jlanecr500" data-source="post: 5758380" data-attributes="member: 16430"><p>The #1 cause of tumbling is the lack of stabilization. In sabotless sml's it is usually due to lack of rifling engagement. Engagement is achieved by obturation ( swelling of the bullet when the charge goes off). Light loads typically used in single shot conversions do not obturate as well as hotter loads for more substantial barrel diameters. This is where a dry wool wad comes into play. The wad tends to seal the pressure, delivering the kick in the pants to the entire rear surface of the bullet, prevents leakage around the bullet, and helps keep powder dry. I advise using a wad in any sabotless sml that is used in hunting.</p><p></p><p>A choked barrel ( tight at the muzzle and loose at the breech) can do the same thing. You want your bullet to have 5 to 10 pounds of resistance when seating on the powder. To check, use an analog bathroom scale. Zero the scale with the gun and ramrod on it. Then load a bullet and watch the scale as you push it down the barrel. At least 5 pounds of pressure needed to push the bullet onto the powder.</p><p></p><p>I used to have a Savage rifle action with an EABCO Savage accuracy barrel in 450 marlin (same bore as 45-70). It was a 1-14 twist. WGK has it now and it loves Barnes 275 xpb's with a wad and a load of n120.</p></blockquote><p></p>
[QUOTE="jlanecr500, post: 5758380, member: 16430"] The #1 cause of tumbling is the lack of stabilization. In sabotless sml's it is usually due to lack of rifling engagement. Engagement is achieved by obturation ( swelling of the bullet when the charge goes off). Light loads typically used in single shot conversions do not obturate as well as hotter loads for more substantial barrel diameters. This is where a dry wool wad comes into play. The wad tends to seal the pressure, delivering the kick in the pants to the entire rear surface of the bullet, prevents leakage around the bullet, and helps keep powder dry. I advise using a wad in any sabotless sml that is used in hunting. A choked barrel ( tight at the muzzle and loose at the breech) can do the same thing. You want your bullet to have 5 to 10 pounds of resistance when seating on the powder. To check, use an analog bathroom scale. Zero the scale with the gun and ramrod on it. Then load a bullet and watch the scale as you push it down the barrel. At least 5 pounds of pressure needed to push the bullet onto the powder. I used to have a Savage rifle action with an EABCO Savage accuracy barrel in 450 marlin (same bore as 45-70). It was a 1-14 twist. WGK has it now and it loves Barnes 275 xpb's with a wad and a load of n120. [/QUOTE]
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Tennessee Gun Owners Forums
Muzzleloader
Bullet not stabilizing
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