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Rifles, Reloading, Optics, Equipment
Reloading
300 rum load development
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<blockquote data-quote="Cross C" data-source="post: 1584275" data-attributes="member: 77190"><p>I have worked up 3 different barrels chambered in 300 RUM for my Dad's custom builds. All have been on Stiller Predator LA with Seekins 300/338 long BDM, so these lengths are a little long, but still you could fit them in a CIP length BDM i believe. </p><p></p><p>Retumbo has been excellent each time, just lancetkenyon suggested above. Super stable with the various Temps we see in Wyoming. Great groups when you find the nodes that the 230 likes, the challenge was finding the top end as you suggest because factory lengths with the RUM are so pedestrian. I had good luck using the Optimal Charge Weight test and then fine tuned with 3 shot groups from there. </p><p></p><p>I found that 90.00 was our max at 3.100" ogive length with new Norma brass. The previous barrel we had some older Retumbo that must have been a little slower burning and 91.7 was max pressure at about 70 deg outside with Nosler brass. Fed 215 primers in both loads. </p><p></p><p>With the load we settled on with the new Beanland build on a 28" proof bbl we are at about 3095 avg fps with the Retumbo and the Berger 230s which is CRAZY at 6000 ft elevation. </p><p></p><p>I'm glad to see RUM threads here now and again! Good luck with your tests.</p></blockquote><p></p>
[QUOTE="Cross C, post: 1584275, member: 77190"] I have worked up 3 different barrels chambered in 300 RUM for my Dad's custom builds. All have been on Stiller Predator LA with Seekins 300/338 long BDM, so these lengths are a little long, but still you could fit them in a CIP length BDM i believe. Retumbo has been excellent each time, just lancetkenyon suggested above. Super stable with the various Temps we see in Wyoming. Great groups when you find the nodes that the 230 likes, the challenge was finding the top end as you suggest because factory lengths with the RUM are so pedestrian. I had good luck using the Optimal Charge Weight test and then fine tuned with 3 shot groups from there. I found that 90.00 was our max at 3.100" ogive length with new Norma brass. The previous barrel we had some older Retumbo that must have been a little slower burning and 91.7 was max pressure at about 70 deg outside with Nosler brass. Fed 215 primers in both loads. With the load we settled on with the new Beanland build on a 28" proof bbl we are at about 3095 avg fps with the Retumbo and the Berger 230s which is CRAZY at 6000 ft elevation. I'm glad to see RUM threads here now and again! Good luck with your tests. [/QUOTE]
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300 rum load development
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