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Old November 9, 2010, 07:28 PM   #9
Senior Member
Join Date: September 29, 2008
Location: Oregon
Posts: 2,237
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.
"The ultimate authority ... resides in the people alone. ... The advantage of being armed, which the Americans possess over the people of almost every other nation ... forms a barrier against the enterprises of ambition."
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