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Posted: 11/19/2008 6:07:51 AM EDT
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I just reloaded for the first time about 40 rounds of .223 using a Rock Chucker with RCB small base die set. i did everything by the Speer book and they came out fine until the seater/crimper die.
About half of the rounds have a fairly large bulge at the base of the neck and shoulders of the cases and are out of spec. I'm not even going to try to fire them and will just recycle the components. I suspect that it's happening when the Hornady 55gr. FMJ bullet is being pushed into the neck and putting too much force down on the neck. Does these bullets need to be lubed or waxed to make it slide into the neck easier? What product do you recommend getting? Thanks! |
| Imperial Sizing Wax, and I do not think that is your problem. You probably have the die set too far down. Back your die out, and reset it per the instructions (raise ram to the top of the stroke, screw die down until it touches the shell carrier, then back off a half turn or so). That is about the only reason you are squishing the brass, and forming a collar around the shoulder. |
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As above. If your cases vary a bit in length, then your die might be trying to crimp too early which would cause the problem. If I'm going to crimp, then I make sure all the cases are the same length (within +/- 0.002") and generally crimp after the bullets are seated. This makes for a separate operation, but the overall length and crimp are more consistent.
When crimping as a separate step, make sure that your seating stem is backed off. Another possible cause is that the cases might not be deburred enough on the inside of the case mouth. This could cause too much resistance on seating. But, since you are using a boat-tailed bullet. this is not as likely. The only bullets that need lube are cast bullets. Jacketed bullets you want dry so that there is more friction holding the bullet in place. Not enough friction can cause the bullets to seat deeper in the case when being fed from the magazine. |
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If you are trying to seat and crimp in one step, break it into two separate steps.
If you're seating with the die body in contact with the case mouth, the crimp ring is trying reduce the diameter at the same time the bullet needs to move. Back the body off a half turn and readjust the seater stem. |
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