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Discussion Starter · #1 ·
I have an older RCBS collet type case trimmer and it gives me some trouble on .303 Brit. rimmed cartridge cases. I find that the rim diameters of .303 vary several thosandths from shell to shell, even within the same brand. In a collet type trimmer like the older RCBS that changes the entry of the collet into the cartridge holder. As a result I am experiencing considerable variation in the trim lengths of my .303 shells. After setting trim length and proceeding from one cartridge to the next I get trim lengths that vary of as much as .010" from one shell to the next.

I am looking for a timmer that doesn't depend of a collet so I wont get cartridge length variations on rimmed cartridges. Both the RCBS trimpro and the Lyman Universal tirmmer look like they may have a design that may not give me the same problem as they don't use colletts.

I would like to hear from users of these two trimmers as to whether they may help the problem I am having with vaiances in Rim Diameters messing up my cartridge lengths.
 

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I have a Lyman universal case trimmer and it works pretty well. The only problem that I have is I have to push the pilot into the case mouth before I lock down the rim or the case isn't straight. Good luck trying to find the power adapter, too. They make a new shaft that you can put a drill on and trim cases with that, but no one seems to carry it. The lock works well from .223 to 300 RUM to 500 [email protected] to 45-70. I haven't found a case yet that won't work. Hope this helps.
 

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Discussion Starter · #3 ·
BassnMan said:
I have a Lyman universal case trimmer and it works pretty well. The only problem that I have is I have to push the pilot into the case mouth before I lock down the rim or the case isn't straight. Good luck trying to find the power adapter, too. They make a new shaft that you can put a drill on and trim cases with that, but no one seems to carry it. The lock works well from .223 to 300 RUM to 500 [email protected] to 45-70. I haven't found a case yet that won't work. Hope this helps.
Thanks BassnMan,
That helps alot. You are the only respondent that I had and I posted my query on three different forums.
 
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