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Rifles, Reloading, Optics, Equipment
Reloading
243 Winchester 1:10 twist long range load
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<blockquote data-quote="QuietTexan" data-source="post: 2370871" data-attributes="member: 116181"><p>What's your barrel length? If 24" or longer yeah, I'd run a 6-10 shot ladder to see if you get better velocity from it compared to the RL-17. 243 Win is an overbore cartridge, so slower powders can work well. The case fill is so low with common powders there's a lot of room available, and if you seat out past book COL or 2.680" or SAAMI max of 2.710" you get even more. I was at 2.735" COL sat 0.020" off with 90gn Nosler BTs.</p><p></p><p>Alliant lists 48gn max at 2.625" COL for Speer 90gn spire points. If you have a long enough throat and a long enough barrel it could work well. Starting load would be dependent on your COL, and I would expect you to run out of room before you hit pressure but be careful about it, especially if you're seating long.</p><p></p><p>The 243 is about as overbore as a 7SAUM, it gets unfairly maligned as a women-and-kids round so it's easy to forget it's basically a 6mm magnum.</p></blockquote><p></p>
[QUOTE="QuietTexan, post: 2370871, member: 116181"] What's your barrel length? If 24" or longer yeah, I'd run a 6-10 shot ladder to see if you get better velocity from it compared to the RL-17. 243 Win is an overbore cartridge, so slower powders can work well. The case fill is so low with common powders there's a lot of room available, and if you seat out past book COL or 2.680" or SAAMI max of 2.710" you get even more. I was at 2.735" COL sat 0.020" off with 90gn Nosler BTs. Alliant lists 48gn max at 2.625" COL for Speer 90gn spire points. If you have a long enough throat and a long enough barrel it could work well. Starting load would be dependent on your COL, and I would expect you to run out of room before you hit pressure but be careful about it, especially if you're seating long. The 243 is about as overbore as a 7SAUM, it gets unfairly maligned as a women-and-kids round so it's easy to forget it's basically a 6mm magnum. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
243 Winchester 1:10 twist long range load
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