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Rifles, Reloading, Optics, Equipment
Reloading
300 RUM load development questions
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<blockquote data-quote="MontanaRifleman" data-source="post: 747269" data-attributes="member: 11717"><p>A lot of good suggestions and I'll ad some input. I have had good luck with Retumbo. It's an ideal powder for the 300 RUM, especially with heavier bullets... slow burning and very stable and produces good velocity. I haven't tried the 215 hybrids yet but from what I've read I will be.</p><p></p><p>I also started out with the Redding bushing neck, body die and comp seater. I have since gone with the FL sizer and it works fine. If you neck size only until you need to bump back, every time you shoot you will have different brass. I FL size the new brass and after each firing and that way i have consistent brass. When you go to body or FL size, you might find cases wanting to get stuck. I was using One Shot spray lube which worked well on other cases, but not my 300 RUM. I went to imperial sizing wax and it works great. I also stick the necks about half way into the wax and that helps greatly with a smooth pull out of the expander. You might want to put just a little on the expander before you start. if your concerned about lube in the neck, then run them in the tumbler for a few minutes or swab them out with a q-tip. It hasn't been an issue with me.</p><p></p><p>As far as seating depth goes, you might have to choose between accuracy and the mag box. I ended up seating to just off the lans maybe .010 - .020. Although I could load all the way down into the box, I could still put one down with nose just above the box and have a second shot if needed. That's life with the RUM depending on throat design. You can get a Wyatts extended box to help a little.</p><p></p><p>Hope that helps,</p><p></p><p>Mark</p></blockquote><p></p>
[QUOTE="MontanaRifleman, post: 747269, member: 11717"] A lot of good suggestions and I'll ad some input. I have had good luck with Retumbo. It's an ideal powder for the 300 RUM, especially with heavier bullets... slow burning and very stable and produces good velocity. I haven't tried the 215 hybrids yet but from what I've read I will be. I also started out with the Redding bushing neck, body die and comp seater. I have since gone with the FL sizer and it works fine. If you neck size only until you need to bump back, every time you shoot you will have different brass. I FL size the new brass and after each firing and that way i have consistent brass. When you go to body or FL size, you might find cases wanting to get stuck. I was using One Shot spray lube which worked well on other cases, but not my 300 RUM. I went to imperial sizing wax and it works great. I also stick the necks about half way into the wax and that helps greatly with a smooth pull out of the expander. You might want to put just a little on the expander before you start. if your concerned about lube in the neck, then run them in the tumbler for a few minutes or swab them out with a q-tip. It hasn't been an issue with me. As far as seating depth goes, you might have to choose between accuracy and the mag box. I ended up seating to just off the lans maybe .010 - .020. Although I could load all the way down into the box, I could still put one down with nose just above the box and have a second shot if needed. That's life with the RUM depending on throat design. You can get a Wyatts extended box to help a little. Hope that helps, Mark [/QUOTE]
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300 RUM load development questions
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