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Rifles, Reloading, Optics, Equipment
Reloading
300 RUM load development questions
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<blockquote data-quote="Bart B" data-source="post: 778042" data-attributes="member: 5302"><p>Use Tulammo (formerly Wolf) primers from Russia. They're popular with long range competitors these days. And replace your firing pin spring with one10% to 15% stronger than the factory one. Primers need to be smacked hard to make them consistant. Those springs usually weaken over time and weak ones don't fire primers uniformly. Replace them every 2 or 3 years. Verify your firing pin protruded at least .055" from the bolt face but no more than .065"; not enough won't fire primers consistantly, either.</p><p></p><p>I've never owned nor used a chronograph working up a load. Just used loads that other folks got good results with. I did borrow one to see what vertical shot stringing there was at long range due to velocity spread and do some tests with ballistic software, but that's all. I think most chrono's have lights in their screens and the sun angle doesn't effect them. Check out the specs on some and find out for sure.</p></blockquote><p></p>
[QUOTE="Bart B, post: 778042, member: 5302"] Use Tulammo (formerly Wolf) primers from Russia. They're popular with long range competitors these days. And replace your firing pin spring with one10% to 15% stronger than the factory one. Primers need to be smacked hard to make them consistant. Those springs usually weaken over time and weak ones don't fire primers uniformly. Replace them every 2 or 3 years. Verify your firing pin protruded at least .055" from the bolt face but no more than .065"; not enough won't fire primers consistantly, either. I've never owned nor used a chronograph working up a load. Just used loads that other folks got good results with. I did borrow one to see what vertical shot stringing there was at long range due to velocity spread and do some tests with ballistic software, but that's all. I think most chrono's have lights in their screens and the sun angle doesn't effect them. Check out the specs on some and find out for sure. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
300 RUM load development questions
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