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Nicolas-
PTG's reamer book is all REAMER dimensions.
Don't confuse reamer dimensions with cartridge dimensions, they are certainly different so that the loaded cartridges will fit into the chamber.
Necessary clearances vary based on the type of action being used.
0.004" would be snug and 0.002" being absolutely tight on the neck clearance.
Factory firearms from companies like remington or winchester will usually run 0.008" or more.
Body clearances should be around 0.006" to 0.008"+.
If you have Ken Howell's blue book, it's a set of CARTRIDGE drawings, NOT REAMERS.
I have both of these books as well.
Ask more specific questions about actual dimensions and I will be happy to throw my opinions out.
I use PTG's reamer just as they suppply it with a 0.336" neck and it works fine for MOST brass.
Beware of heavy/thick brass such as Federal and maybe Lapua.
Randall
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Threaded Mode
