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Reloading for a semi auto

wade2big

Two Star General
Full Member
Minuteman
Sep 16, 2017
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Do I need to use small base dies to reload for a .308 AR10? I need to purchase dies and want to make sure I’m doing right. Its a Daniel defense. I have no experience loading for a semi auto. Reliability is the priority.
 
In my experience any die from a reputable company will work just fine. There is no need to seek out anything 'special'.

Just so long that you are properly full length resizing and not doing something dumb like neck sizing only you should be fine.
 
If reliability is super important, get a rollsizer. Small base dies don't generally accomplish what they set out to do without creating some other issues.
 
...based on your stated experience level in reloading, I would recommend you go with the RCBS AR series dies for .308. The dies are essentially FL/SB (full length/small base) and eliminate one potential issue you could encounter when reloading for a gasser. https://www.rcbs.com/dies-and-shell...base-taper-crimp-die-set---ar-series/780.html

....One never knows what exactly the purchased rifle/barrel chamber is, tight, medium or loose...it would depend on how much wear has occurred on the reamer used for it. Improper/insufficient shoulder bump is commonly mistaken for an oversized web case when a sized casing won't chamber properly.

....I would seriously recommend obtaining a slotted case gauge from Sheridan Engineering, it can be used to set up your dies, determine bullet seating depths, determine shoulder bump, casing trim length, cartridge overall length (COAL) of loaded round, etc., all in a single glance. For new reloaders this is one of the best expenditures on tools that will eliminate many of the frustrations they may encounter by eliminating the "guessing".. https://sheridanengineering.com/product/308-win-ammunition-gauge/
 
....I would seriously recommend obtaining a slotted case gauge from Sheridan Engineering, it can be used to set up your dies, determine bullet seating depths, determine shoulder bump, casing trim length, cartridge overall length (COAL) of loaded round, etc., all in a single glance. For new reloaders this is one of the best expenditures on tools that will eliminate many of the frustrations they may encounter by eliminating the "guessing".. https://sheridanengineering.com/product/308-win-ammunition-gauge/
seconded wholeheartedly. one of the best reloading tool I have on the bench and used daily.
I would happily pay a second chambering fee to every gunsmith providing such a tool using the cut away part of the barrel. My usual application is to ensure smooth chambering into prs bolt gun but same applies to ARs.