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1/22/2020 12:12:56 PM
Posted: 10/12/2007 7:30:14 AM EST
Explain the dfference/reasons for the SM base die vs the FL die...for .223

Thanks
Link Posted: 10/12/2007 7:52:58 AM EST
My understanding is that the small base die squeezes the base of the case smaller for more reliable feeding/extraction from a semi autos chamber. In several different semi's (HK91, M14, AR15, AR10), I've only ever used standard resizing dies.
Link Posted: 10/12/2007 12:12:03 PM EST
SB overworks the brass. If you have a tight chamber you may need it a good indication is stuck cases. If you don't need it it wears out your brass quicker. That's my understanding.
Link Posted: 10/12/2007 12:29:41 PM EST
Doug and Bill both hit the nail on the head. I don't really get the need for them, I've had several precision semi auto rifles with tighter chambers and haven't had a need for a Small Base die for any of them. A standard full length die works best, especially the bushing dies combined with a headspace case gauge for you calipers.
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