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Rifles, Reloading, Optics, Equipment
Reloading
300 wm/retumbo/208 amax--anybody?
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<blockquote data-quote="kraky" data-source="post: 205590" data-attributes="member: 180"><p>I can tell you a bit about retumbo because I've used it in 300 wby and 300 win. For me it is a kind of "different powder" when it comes to compressed loads. EVERYONE SOUNDS LIKE A BROKEN RECORD ABOUT SAYING "WORK UP". But I think retumbo merits more attention than other powders. When you run highly compressed loads it doesn't make the normal crunching sound....it kind of squeaks as it packs. I've pulled bullets loaded with retumbo and had a hard time shaking it loose once packed. Here's an example of how I got in a bit of trouble with it and why you should be careful.....</p><p>I've gotten up to 83 grains under a 200 ab and then seated it to 3.340 for my tikka. It cranked out about 2925 fps. There were no signs of pressure. So, I say to mayself lets try the same load under a 180 tsx. The tsx has way less bearing area and probably takes up less case room.......off to the range and......I'm cranking 3250 out of a 24" barrel and primer pockets are totally shot....but not blown. NOw in normal conditions I don't think the 180 tsx is gonna make more pressure than a 200 ab but in this case there was something about the compression of the powder that seems to have had a BIG INFLUENCE.</p><p>I guess my best advice is to use H1000 data..and work up slightly from there with the retumbo and see what you get. Watch compressed loads....highly compressed seemed to "tame it down" while a less compressed load was more volatile. I think it's a good powder but needs to be worked with an open mind.</p></blockquote><p></p>
[QUOTE="kraky, post: 205590, member: 180"] I can tell you a bit about retumbo because I've used it in 300 wby and 300 win. For me it is a kind of "different powder" when it comes to compressed loads. EVERYONE SOUNDS LIKE A BROKEN RECORD ABOUT SAYING "WORK UP". But I think retumbo merits more attention than other powders. When you run highly compressed loads it doesn't make the normal crunching sound....it kind of squeaks as it packs. I've pulled bullets loaded with retumbo and had a hard time shaking it loose once packed. Here's an example of how I got in a bit of trouble with it and why you should be careful..... I've gotten up to 83 grains under a 200 ab and then seated it to 3.340 for my tikka. It cranked out about 2925 fps. There were no signs of pressure. So, I say to mayself lets try the same load under a 180 tsx. The tsx has way less bearing area and probably takes up less case room.......off to the range and......I'm cranking 3250 out of a 24" barrel and primer pockets are totally shot....but not blown. NOw in normal conditions I don't think the 180 tsx is gonna make more pressure than a 200 ab but in this case there was something about the compression of the powder that seems to have had a BIG INFLUENCE. I guess my best advice is to use H1000 data..and work up slightly from there with the retumbo and see what you get. Watch compressed loads....highly compressed seemed to "tame it down" while a less compressed load was more volatile. I think it's a good powder but needs to be worked with an open mind. [/QUOTE]
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300 wm/retumbo/208 amax--anybody?
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