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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
I need a refresher on load development.
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<blockquote data-quote="Brent" data-source="post: 24967" data-attributes="member: 99"><p>I finally have "some" results with the 220gr SMK over RL25. First trip to the range was with 88.5 - 93gr in .5gr steps at 3.75" oal. Well guess what... 88.5 was 67,000 psi already! So much for that starting load. I had them seated into the lands .005" while I broke in some new brass. </p><p></p><p>I fired the 89 and 89.5gr loads too and was up to 71k psi that fast. No psi signs besides primers spreading out some. My factory ammo tested normal psi so I headed home. </p><p></p><p>When I got home I loaded some back up at 86.5 - 89.5, begining slightly lower, just in case psi was still high, seating them and the unfired remaining loads deeper to .050" off the lands just to see if psi would come down some. </p><p></p><p>Next, I loaded up some at a little lower range, 84 - 88.5 seated into the lands .005" like the first ones.</p><p></p><p>Just for kicks and giggles I loaded up some at 86.5 - 93 seated .105" off the lands that would fit in the magazine. As you can see, I didn't want to come home with a cold barrel again. <img src="http://images/icons/grin.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /> </p><p></p><p>Stay tuned... I'll post results when I wake up in the mornin. I'm beat. <img src="http://images/icons/wink.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="Brent, post: 24967, member: 99"] I finally have "some" results with the 220gr SMK over RL25. First trip to the range was with 88.5 - 93gr in .5gr steps at 3.75" oal. Well guess what... 88.5 was 67,000 psi already! So much for that starting load. I had them seated into the lands .005" while I broke in some new brass. I fired the 89 and 89.5gr loads too and was up to 71k psi that fast. No psi signs besides primers spreading out some. My factory ammo tested normal psi so I headed home. When I got home I loaded some back up at 86.5 - 89.5, begining slightly lower, just in case psi was still high, seating them and the unfired remaining loads deeper to .050" off the lands just to see if psi would come down some. Next, I loaded up some at a little lower range, 84 - 88.5 seated into the lands .005" like the first ones. Just for kicks and giggles I loaded up some at 86.5 - 93 seated .105" off the lands that would fit in the magazine. As you can see, I didn't want to come home with a cold barrel again. [img]images/icons/grin.gif[/img] Stay tuned... I'll post results when I wake up in the mornin. I'm beat. [img]images/icons/wink.gif[/img] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
I need a refresher on load development.
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