You have hit the nail on the head so to speak, with the problem that 99% of motorized trimmers are plagued with. They simply don't turn the cutting head fast enough. The reason is they try to use too small of a motor to begin with, that simply doesn't produce enough torque. So they reduce RPM to increase torque. The end result is a trimmer that will have you receiving Social Security payments before you get any volume of brass trimmed. Not to mention the huge burr they will leave on both the inside and outside of the case mouth, requiring yet another operation to remove. I delt with this for years with my old Lyman "Crank-O-Matic", before I finally got fed up and purchased a Giraud Powered Case Trimmer.
http://www.youtube.com/watch?v=SGYLmHvKVd0
They aren't cheap, but nothing comes close to matching it in speed or precision. If you compare the cost of the Lyman or RCBS powered models, the Giraud isn't bad at all. Especially when you take into account it chamfers both the outside, as well as the inside of the case mouth at the same time it trims to length with a + - .002 length tolerance. I trimmed 2,350 .223 cases in under 3 hours, start to finish. Even the Dillon model cannot match it. Case trimming is the biggest PITA in reloading. Yet it is a very necessary step. With the Giraud it makes it effortless. It is one of those tools you hate like hell to spend the money on, but once you do you'll be glad you did. Bill T.
http://www.youtube.com/watch?v=SGYLmHvKVd0
They aren't cheap, but nothing comes close to matching it in speed or precision. If you compare the cost of the Lyman or RCBS powered models, the Giraud isn't bad at all. Especially when you take into account it chamfers both the outside, as well as the inside of the case mouth at the same time it trims to length with a + - .002 length tolerance. I trimmed 2,350 .223 cases in under 3 hours, start to finish. Even the Dillon model cannot match it. Case trimming is the biggest PITA in reloading. Yet it is a very necessary step. With the Giraud it makes it effortless. It is one of those tools you hate like hell to spend the money on, but once you do you'll be glad you did. Bill T.