tires2burn Posted June 4, 2016 Share Posted June 4, 2016 I'm starting to load some 300 BO and have the cases trimmed and am ready to debur. The question is will my rotary tumbler with ss pins take off the case mouth burrs? When I loaded 223 in the past I always debured by hand. Anybody tried this yet? Link to comment Share on other sites More sharing options...
Nathanb Posted June 4, 2016 Share Posted June 4, 2016 I trim with the Dillon trimmer so I do t do anything to it. What trimmer to start Link to comment Share on other sites More sharing options...
Dannybot Posted June 4, 2016 Share Posted June 4, 2016 It helps, but doesn't get all the burs in my experience. Link to comment Share on other sites More sharing options...
tires2burn Posted June 5, 2016 Author Share Posted June 5, 2016 I use a Little crow trimmer. Link to comment Share on other sites More sharing options...
co-exprs Posted June 5, 2016 Share Posted June 5, 2016 Since 300aac is not really a precision round, the tumbler will take off enough for what you are doing. The edge will round off enough to not scratch up the ogive while seating. I only trim and debur my long range stuff for that extra half MOA. Link to comment Share on other sites More sharing options...
co-exprs Posted June 5, 2016 Share Posted June 5, 2016 Since 300aac is not really a precision round, the tumbler will take off enough for what you are doing. The edge will round off enough to not scratch up the ogive while seating. I only trim and debur my long range stuff for that extra half MOA. Link to comment Share on other sites More sharing options...
RecoilJunkie Posted June 5, 2016 Share Posted June 5, 2016 As others have said it will help but not remove it all. But for what you're doing you'll be ok. Link to comment Share on other sites More sharing options...
perttime Posted June 5, 2016 Share Posted June 5, 2016 (edited) Since 300aac is not really a precision round... Out of the right barrel (and the rest put together right) it will do sub-MOA, at least with good supersonic loads - within reasonable distances for its velocity Edited June 5, 2016 by perttime Link to comment Share on other sites More sharing options...
tires2burn Posted June 5, 2016 Author Share Posted June 5, 2016 No subsonic loads planned yet, just midrange supersonic with 150gr FMJBT Link to comment Share on other sites More sharing options...
Hozzie Posted June 5, 2016 Share Posted June 5, 2016 You will be fine without doing anything extra. Link to comment Share on other sites More sharing options...
co-exprs Posted June 5, 2016 Share Posted June 5, 2016 Since 300aac is not really a precision round...Out of the right barrel (and the rest put together right) it will do sub-MOA, at least with good supersonic loads - within reasonable distances for its velocity You are right. With the right build, the right loads, with glass and in the right hands, sub MOA can be achieved. But from a round designed for suppressed SBR's who cares? If you really wanted a rifle for precision shooting at distance, 300aac is the wrong choice. For what the round was designed for, 2moa is plenty accurate. The barrel twist in most 300 barrels is wrong for the fast stuff, you might want to reach out with and the subsonics have such a wicked arc, they are the way wrong choice for targets any further than 150-200yds. Link to comment Share on other sites More sharing options...
perttime Posted June 6, 2016 Share Posted June 6, 2016 An IPSC Rifle shooter might care. Using that right barrel with slower twist, you can make Major PF (320, possibly being reduced to 280) with the 300BLK case, out of the AR platform. Link to comment Share on other sites More sharing options...
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