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Rifles, Reloading, Optics, Equipment
Reloading
Load development? 300rum, 230gr, RL33
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<blockquote data-quote="AZShooter" data-source="post: 972562" data-attributes="member: 5219"><p>I was lucky that everything fell together so well with my 300 RUM. It is a post 64 model 70 with a Wyatt's mag box. The first 300 RUM barrel was a Lilja without enough twist to shoot the 230s. I just had to try them so I ordered a reamer from PT&G and rechambered and fitted a 24" 300 win mag Rem takeoff to see what it would do. </p><p></p><p>Around the same time I got my hands on some of the first RL-33 sold. There was no load data available. Did some comparisons of available load data and concluded RL-33 is slower than Retumbo. I discovered with several over bore cartridges that mid to uppper range load of Retumbo is a good starting point.</p><p></p><p>Here are the specs for my rifle: 3.775" OAL </p><p>100 gr of RL-33 most accurate at 2975 fps (loaded to 102 grs with no signs of excessive pressure)</p><p></p><p>The bullet doesn't engage the rifling but to be honest I only seated to fit and feed the mag box don't even know the jump. I thought I might have to tweak the seating depth later but it ended up being very accurate so I never bothered. Seems to be a trend with those hybrids. </p><p></p><p>I will be very interested in your final results with a 30" barrel. IMO I don't think you need to vary your powder charge weights by 1/2 grain during workup. Maybe later for final tweaking if you find it necessary.</p></blockquote><p></p>
[QUOTE="AZShooter, post: 972562, member: 5219"] I was lucky that everything fell together so well with my 300 RUM. It is a post 64 model 70 with a Wyatt's mag box. The first 300 RUM barrel was a Lilja without enough twist to shoot the 230s. I just had to try them so I ordered a reamer from PT&G and rechambered and fitted a 24" 300 win mag Rem takeoff to see what it would do. Around the same time I got my hands on some of the first RL-33 sold. There was no load data available. Did some comparisons of available load data and concluded RL-33 is slower than Retumbo. I discovered with several over bore cartridges that mid to uppper range load of Retumbo is a good starting point. Here are the specs for my rifle: 3.775" OAL 100 gr of RL-33 most accurate at 2975 fps (loaded to 102 grs with no signs of excessive pressure) The bullet doesn't engage the rifling but to be honest I only seated to fit and feed the mag box don't even know the jump. I thought I might have to tweak the seating depth later but it ended up being very accurate so I never bothered. Seems to be a trend with those hybrids. I will be very interested in your final results with a 30" barrel. IMO I don't think you need to vary your powder charge weights by 1/2 grain during workup. Maybe later for final tweaking if you find it necessary. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Load development? 300rum, 230gr, RL33
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