Steyrarms Posted June 11, 2020 Share Posted June 11, 2020 I have a well running M7 EVO Pro and process batches of 10k 223. When it comes to trimming, life sucks a bit, I use the Dillon RT1500, I pre size the brass to 80-85% and than do the final sizing and trimming with the RT I use sorted brass only and always use the same lube. I learned quickly on my old 1050, that is isn‘t a good idea to mix different brass brands, since the length variation is massive. With sorted brass and the RT1500 i got 0.2mm or 0.078inch of variation. According to Dillon about half of it comes from the bearing play in the RT trimmer. Now i was wondering, what variation you get with the Bosch trimmer from M7. My goal would be 0.1mm or 0.04 inch. This is still to much for a tapper crimp so I have to stick with the Lee FC crimp die, that need‘s to be replaced after every 10k rounds, but for me and my „as good as possible“ approach I would like to push it to the minimum. I have spent countless hours on the 1050 and later on the M7 with all kind of settings with all kind of dies and i can truly say, as it is right now, it want get any better with the RT trimmer. Link to comment Share on other sites More sharing options...
DJRyan13 Posted June 11, 2020 Share Posted June 11, 2020 (edited) M7 is coming out with a new trimmer. I am surprised they said that about the Dillon. folks using a 1050 do tricks like balancing the force on shellplate to improve the variation. Do you have the 2nd or 3rd Guide rod? If not, I would get both. Edited June 11, 2020 by DJRyan13 Link to comment Share on other sites More sharing options...
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