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Posted: 8/1/2026 7:42:25 PM EDT
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When forming 300 Black Out with Dillon RT-1500 trimmer, I get a lot of clogging and have to stop, pull vacumn manifold off, clean, put back together and start over again. Using on a S-1050 with Dillon 300 BlackOut carbide cutting die. Maybe need to slow down or ? |
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OK, USA
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Slow down a bit, Your 223 & 308 are probably fairly close to std oal when you run into die to size/trim so not much ie. .002 has to be trimmed off. Where the 300bo brass first trim may need more trimmed ie. .010, so it'll be a lot more coming off. It's next/2nd size/trim most likely be less trimmings coming off. eta: first rt1200 size/trim with once fired lc 556 & 762.51 brass had to go slow cause it trimmed a lot to get it to std oal, Loaded/fired & through the size/trim die again, not so much trimmings coming off there after. |
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Originally Posted By DDRanch: When forming 300 Black Out with Dillon RT-1500 trimmer, I get a lot of clogging and have to stop, pull vacumn manifold off, clean, put back together and start over again. Using on a S-1050 with Dillon 300 BlackOut carbide cutting die. Maybe need to slow down or ? Pics of your setup? I had to port the lock nut on my 223 setup to get enough air draw to prevent clogging. Im assuming you are using the short trim head? |
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Trimming “used to be .223” cases to 300 Blackout length is not like trimming rifle cases that grew from firing. You need to take off about 0.4” (10mm) of case length from that .223 case to make it Blackout length, not the 0.02 to 0.04” that trimming a fired rifle case requires. Since you’re cutting so much more brass with each case, you need to evacuate a LOT more chips a LOT faster, or your cutter will clog quickly. Think REALLY BIG on the vacuum, and be ready to stop now and then to clear out what that big honking vacuum doesn’t quite take care of. |
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Originally Posted By Kaldor: Pics of your setup? I had to port the lock nut on my 223 setup to get enough air draw to prevent clogging. Im assuming you are using the short trim head? That was going to be my guess too…. Not enough “make up” air getting drawn in from the far side of the manifold …so not enough air to carry the chips / shavings / brass “strings” away. I had inherited some cannister type vacuum. So that’s what I was going to use for the RT1200 (at the tine). I’m guessing the vac’s motor was starved for air and it wasn’t being cooled enough. It killed it. |
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