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Posted: 11/27/2008 5:22:36 AM EDT
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Howdy all,
I am newly registered to the forum but I have been reading the posts for a few years. My problem is that when I seat my 9mm 115gr FMJ bullets in the cases they don't seem to seat directly straight. I usually take each round and roll it on its side after I have loaded them. The cases seem to have a slight bit of wobble to them. How can I fix this problem? Should I send RCBS a few bullets to have them form fit a seater plug that directly fits my bullets? Thanks in advance for the help, The Dark Horse |
| are you using the correct seating die by I mean there are general seating dies then there are caliber seating dies and then case specific seating dies . Once the bullet and case enter the die if its a case specific ( 9mm luger dies) they pretty much line up themselves. Ive had a few not be perfect but they chamber and fire fine in my pistols. Are your cases going strainght in. maybe the shell holder is on a cant I really have never seen that |
| Seating die could be an issue, but sufficient cae mouth belling can also be the cause. If there isn't enough belling on the case mouth the bullet will jam at whatever angle you place the bullet at and not straighten out as it seats. At least that is something I have noticed. |
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I am using a RCBS 9mm seating and taper crimp die that has been set up according to the RCBS instructions.
I bell my case mouths so that you can just start to see the belling with the naked eye at about 14 inches from my face. I figured that is enough compaired to the reloading manuals pictures that I have seen. Thanks again for all of the help |
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If you have loaded lead rounds before it cakes in the die after a lot of rounds and you have to clean it out. If not
some bullets don't fit some dies. Contact rcbs or go with a die that has a floating slide like a forester, if they make them in 9mm. Also if your equipment is new, (any or all) check things for burrs that may have the shell holder out of square. It's rare but I have seen it before. |
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I would lower the die as much as possible without touching the shellplate and adjust the seater further out so the OAL is the same as before.
This may help align the bullet alittle better as it has a chance to straighten in the die body before hitting the stem. Just a thought |
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I use a Redding Competition Seater for my 9mm rounds and the bullets still seat crooked if I start them in the case crooked. You can have custom dies made, but it will not change anything. The fact that the case mouth is belled means the bullet has at least .030" of wobble room.
Start the bullet as straight as you can. Spin the case in the shell holder 180 degrees half way through the seating cycle. That is the only way you'll get straight rounds. |
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Quoted:
I use a Redding Competition Seater for my 9mm rounds and the bullets still seat crooked if I start them in the case crooked. You can have custom dies made, but it will not change anything. The fact that the case mouth is belled means the bullet has at least .030" of wobble room. Start the bullet as straight as you can. Spin the case in the shell holder 180 degrees half way through the seating cycle. That is the only way you'll get straight rounds. You beat me to it. Half-seat, rotate, then fully seat. Nice and straight. I'm using the same dies you are, OP, for 9mm. Haven't really had this problem. I will say that a very slight tilt, very slight, probably won't affect accuracy or reliability, depending on what pistol you're putting them through. If it's just a little crookedness, it's probably nothing to worry about. |
| My biggest worry is that the problem might reduce accuracy in my 7 inch 9mm AR-15 barrel. These rounds will also be shot from a 9mm Taurus Millinium Pro pistol. The ammo loads fine but I was wondering if the slight bit of incorrect pitch while the bullet was in the case would lead to an inaccurate round. |
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Shouldn't be detrimental to accuracy in either of those platforms.
Show us some pics.............how crooked could they be? Or: do the EXACT same load (same charge, bullet, case type, etc.) both ways––that is, load some of your regular loads, the ones that come out "crooked", and another batch doing what 918v said, that is, half-seat, rotate, seat, so they're perfectly straight. Shoot some rounds of both batches, same gun, same day, same position, same distance, etc., and see if there's any noticeable difference in accuracy between the "crooked" ones and the perfectly straight ones. My bet is you'll notice no difference at all. |
| Are you trimming all your cases to a uniform length? If not your belling of the case mouth will likely very a lot. You can't get a uniform crimp on cases that very in length either, and your brass should also be sorted by MFG as there is a great variation in case thickness and the rim between MFG's. |
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It is unecessary to trim straight-walled pistol brass. I never have, never will. I've had no detrimental effects, no problems with "crimp inconcistency, anything like that. 9mm brass length varies from .742" to .756" in my experience. This certainly affects headspace and the degree of crimp applied by your dies. |
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