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Rifles, Reloading, Optics, Equipment
Gunsmithing
any fans of the 22-6mm?
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<blockquote data-quote="J E Custom" data-source="post: 760499" data-attributes="member: 2736"><p>Another indication of velocity and twist rate combinations- A while back I wanted a super fast</p><p>cartrige and did the research before I started the project.</p><p></p><p>My findings were interesting to say the least. The guys that had tried it with the fast twist barrels</p><p>had problems at the higher velocities. I had a long barrel 7 STW that shot 140 grain bullets past </p><p>3800 ft/sec. The problem was after I exceeded 3700 ft/sec accuracy went out the window in the </p><p>1 in 9 twist barrel. I switched to 160s that would just barely exceed 3500 ft/sec and accuracy</p><p>returned.</p><p></p><p>After recovering a few of the bullets and ending up with mutable holes in paper with one shot</p><p>I deducted that the bullets were sheding the jackets and separating the jacket from the core</p><p>when the bullet impacted the rifling at the throat.</p><p></p><p>Armed with my experances and other peoples experance I decided to go to the other extreem. </p><p>The rifle Is a 22WSSM and the barrel is a 3 grove Lilja with a 1 in 15 twist (I had thought </p><p>about a gain twist).</p><p></p><p>To date I have exceeded 4600 ft/sec with good accuracy and no problems using the 40 grain</p><p>Ballistic tip. I have also tried 55 and 60 grain bullets and they worked good. I intend to try 70 </p><p>and 80 grain bullets next to see if they will work.(This is an on going experiment).</p><p></p><p>I have loaded some 35 grain bullets but have not fired them through a chronograph .</p><p></p><p>I am just trying to find out just how I can push a 22 cal bullet.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 760499, member: 2736"] Another indication of velocity and twist rate combinations- A while back I wanted a super fast cartrige and did the research before I started the project. My findings were interesting to say the least. The guys that had tried it with the fast twist barrels had problems at the higher velocities. I had a long barrel 7 STW that shot 140 grain bullets past 3800 ft/sec. The problem was after I exceeded 3700 ft/sec accuracy went out the window in the 1 in 9 twist barrel. I switched to 160s that would just barely exceed 3500 ft/sec and accuracy returned. After recovering a few of the bullets and ending up with mutable holes in paper with one shot I deducted that the bullets were sheding the jackets and separating the jacket from the core when the bullet impacted the rifling at the throat. Armed with my experances and other peoples experance I decided to go to the other extreem. The rifle Is a 22WSSM and the barrel is a 3 grove Lilja with a 1 in 15 twist (I had thought about a gain twist). To date I have exceeded 4600 ft/sec with good accuracy and no problems using the 40 grain Ballistic tip. I have also tried 55 and 60 grain bullets and they worked good. I intend to try 70 and 80 grain bullets next to see if they will work.(This is an on going experiment). I have loaded some 35 grain bullets but have not fired them through a chronograph . I am just trying to find out just how I can push a 22 cal bullet. J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
any fans of the 22-6mm?
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