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Rifles, Reloading, Optics, Equipment
Reloading
Press upgrade dilemma 338lm
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<blockquote data-quote="Howland" data-source="post: 1948183" data-attributes="member: 103509"><p>I have the Hornady Match dies and use a little RCBS Partner press. I'm happy with the dies for under $100, they feel very smooth and slick while sizing. While I'd love to have a big, heavy duty press (I regret letting the Rockchucker go), the Partner does fine. It doesn't take much force to full length size because I've adjusted the dies so I'm not resizing very much. Any more than just enough to chamber is over sizing. Yeah, I have to tip the bullet tip into and up into the seating die to get the bullet base onto the case mouth. It's only a minor niusiance.</p><p></p><p>I did remove the elliptical expander and use mandrels from 21st Century. 0.3350" gives me noticably better groups than more or less interference fit. They come in 0.0005" increments. I think I have seven different size bushings. Different brands of brass have different neck thickness. I don't want to overwork the necks. I only want to use enough bushing to ensure the mandrel opens the neck.</p><p></p><p>I did pick up a concentricity tester. I measured in the middle of the neck and halfway between the ogive and tip. Middle of the neck showed maximum 0.0015" TIR, about the same variation in neck thickness I measured. No worries there. It won't ever get less than neck thickness variation.</p><p></p><p>Halfway between the ogive and tip showed some very good, others up to 0.0045" TIR. I figured something in the seating step was the cause. I sorted a batch and got 0.6 MOA with the best concentricity, 0.54 MOA with the worst. The concentricity tester can stay on the shelf, but at least now I know.</p><p></p><p>I haven't gone down the neck turning road yet. I'm not sure I will. I will eventually start annealing but I'm pretty sure the next incremental improvement in accuracy will come from improving my shooting fundamentals and skills.</p></blockquote><p></p>
[QUOTE="Howland, post: 1948183, member: 103509"] I have the Hornady Match dies and use a little RCBS Partner press. I'm happy with the dies for under $100, they feel very smooth and slick while sizing. While I'd love to have a big, heavy duty press (I regret letting the Rockchucker go), the Partner does fine. It doesn't take much force to full length size because I've adjusted the dies so I'm not resizing very much. Any more than just enough to chamber is over sizing. Yeah, I have to tip the bullet tip into and up into the seating die to get the bullet base onto the case mouth. It's only a minor niusiance. I did remove the elliptical expander and use mandrels from 21st Century. 0.3350" gives me noticably better groups than more or less interference fit. They come in 0.0005" increments. I think I have seven different size bushings. Different brands of brass have different neck thickness. I don't want to overwork the necks. I only want to use enough bushing to ensure the mandrel opens the neck. I did pick up a concentricity tester. I measured in the middle of the neck and halfway between the ogive and tip. Middle of the neck showed maximum 0.0015" TIR, about the same variation in neck thickness I measured. No worries there. It won't ever get less than neck thickness variation. Halfway between the ogive and tip showed some very good, others up to 0.0045" TIR. I figured something in the seating step was the cause. I sorted a batch and got 0.6 MOA with the best concentricity, 0.54 MOA with the worst. The concentricity tester can stay on the shelf, but at least now I know. I haven't gone down the neck turning road yet. I'm not sure I will. I will eventually start annealing but I'm pretty sure the next incremental improvement in accuracy will come from improving my shooting fundamentals and skills. [/QUOTE]
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Press upgrade dilemma 338lm
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