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Old November 9, 2010, 07:28 PM   #9
NWPilgrim
Senior Member
 
Join Date: September 29, 2008
Location: Oregon
Posts: 2,153
I taper crimp all my .223 ammo wither it has a cannelure (usually 55 gr or 62 gr), or not (like the 75 gr OTM) just like my pistol ammo FMJ. Even a light crimp holds it pretty secure.

And yes, the issue is about the bullet tip jamming on the feed ramp. I have a box of new Winchester SP with such loose neck tension that almost every round had major setback and would jam, but were too dangerous to fire.

Also, I use a relatively bulky powder like Varget which is usually compressed are full so the bullet has little room to set back anyway.
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