Albertl35 Posted December 8, 2008 Share Posted December 8, 2008 Does anyone know how much crimp ther should be for these projectiles? They have no cannelure and the Blackhills loaded ammo looks like they were just seated. Thanks Link to comment Share on other sites More sharing options...
HSMITH Posted December 8, 2008 Share Posted December 8, 2008 no crimp, just iron the bell out. Link to comment Share on other sites More sharing options...
Run n Gun Posted December 8, 2008 Share Posted December 8, 2008 no crimp, just iron the bell out. Bell? What bell? Howard, it's a RIFLE cartridge! The bullet is held in place by neck tension only. Ed Link to comment Share on other sites More sharing options...
HSMITH Posted December 8, 2008 Share Posted December 8, 2008 LOL, no crimp. Link to comment Share on other sites More sharing options...
Albertl35 Posted December 9, 2008 Author Share Posted December 9, 2008 Gentlemen - Thank You. This is what I thought but just want to be sure since the 55 gr cannelure projectiles require a crimp. Link to comment Share on other sites More sharing options...
D.Hayden Posted December 9, 2008 Share Posted December 9, 2008 No rifle bullets require a crimp. Jst see what works best for you. Link to comment Share on other sites More sharing options...
Canuck-IL Posted December 9, 2008 Share Posted December 9, 2008 The cannelure is just an artistic touch ... no crimp needed if they're properly sized. /Bryan Link to comment Share on other sites More sharing options...
Tom D. Posted December 12, 2008 Share Posted December 12, 2008 I believe you will find that the purpose of the crimp is to keep bullets positively in place in FULL auto firearms. Not a concern to the majority of us. Link to comment Share on other sites More sharing options...
technetium-99m Posted December 23, 2008 Share Posted December 23, 2008 If you are using a bushing type resizing die make sure you have enough neck tension to hold the bullet in place if you're loading for an AR. Crimping rifle loads isn't really necessary, unless you have a machine gun as previously mentioned. GT Link to comment Share on other sites More sharing options...
SingleStacker45 Posted January 12, 2009 Share Posted January 12, 2009 With the MG 55gn I have been setting the dillon crimp die to just kiss the rim of the case. Probably rings it in a couple of thousandths. I also trim evry time to keep this consistant but I'm probably giving up some accuracy but I just feel better about reducing the chance of setback. Any thoughts? Mule Link to comment Share on other sites More sharing options...
uscbigdawg Posted January 12, 2009 Share Posted January 12, 2009 I use the Dillon crimp die on my 223 loads. Nothing negative thus far and sub .5 MOA groups say the same. I don't "crimp" them though. Just cleaning up from the powder die. Rich Link to comment Share on other sites More sharing options...
RiggerJJ Posted January 12, 2009 Share Posted January 12, 2009 Dillon crimp die! pull bullets until you make sure you are right at the edge of not denting the bullet, takes a few tries. Go to the point of denting, then back it off until you don't see or measure a dent but right at the ragged edge. I used to run non-crimped in 3gun ARs, and had setback problems, not good with high rifle pressures, and it really affected accuracy. then I did a bunch of testing over the crono, accuracy, etc and zeroed in on the slight crimp being needed in ARs. Ended up with more consistentency over the crono, which translated to better grouping. Also tested chamfering/deburring against a Dillon trimmer (which trims flat) and again was surprised, the Dillon trimmed brass was more accurate! But thats a thread drift... The "no crimp" idea I believe came from bench type bolt guns, but not crimping AR ammo can really screw with things...You crimp a pistol round don't you? AR rifles feed basically the same as a pistol, stripping the top round off the mag, the bullet CONTACTS the ramp, rides up the ramp and hopefully goes in the chamber... of course, YMMV... jj Link to comment Share on other sites More sharing options...
George Posted January 12, 2009 Share Posted January 12, 2009 Dillon cripm die for me, set so it barely kisses the case mouth. Like JJ says, not so that it indents the bullet Link to comment Share on other sites More sharing options...
fastshooter03 Posted January 13, 2009 Share Posted January 13, 2009 My Plinker 55fmjbts get a crimp but the match stuff does not. I run 2 650 diehead setups. Nick Link to comment Share on other sites More sharing options...
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