I'm having a few rounds reloading non concentric out of my Dillon 650. I'm running Dillon carbide dies evrything is nice and tight but 1 out 10 wont fit my chamber. The resized cases fit fine but once reloaded I'm having problems. I need help
.40 S$W not concentric, Ideas?
- Thread starter carlchevalier
- Start date
Yep
Well it means the bullets are not starting into the case square (obviously) but the problem could be a number of things. As mentioned, case flaring. How much flare are you putting on them and have you experimented with different amounts? Also, depending on bullet shape and seating die it is possible the die is not able to stand the bullet up square. Roll crimping dies and larger bore cartridges with flat base bullets can suffer from this. Seating .45-70 with 350 gr RN Hornadys gave me grief because almost all were seated crooked and caused binding when chambered. Starting the bullets in a Lee classic loader then finishing in the press with a roll crimp fixed that particular issue. Before that I would seat bullets roughly 1/8" by feel then take the cartridge out and tweak the bullet by hand/eyeball it straight then finish seating. I know this doesn't fix your issue but hopefully it will get you pointed in the right direction.
Check the amount yiu are expanding, also take the seating dies off and disassemble it to check for debris.
can also be the die is set too low and is causing the roll crimp to be too applied too early, thats why i personqlly like a taper crimp.
can also be the die is set too low and is causing the roll crimp to be too applied too early, thats why i personqlly like a taper crimp.
Too add to these suggestions already posted, check to make sure you are using the correct seater for the bullet type. Pull the clip at the top and take out the insert. Then remove the pin in the side of the insert and the 2 ended seater will come out. Dillon has reversible inserts for 2 different bullet shapes.
The patent for the Lyman type "M" die expired and now a few of the die manufactures are using this type expander. Below is a illustration from the Redding website and their expander for a pistol die set showing the "step" at the case mouth and the mouth flare. The "step" insures the bullet enters the case mouth straight and inline with the case. Many people think the Lyman type "M" expander is for cast bullets only and this is not true, I even use one to expand the necks on my .223 to help reduce bullet runout.
Below the Redding expander.
And again showing the Redding die set and the expander in the center.
And another illustration showing the advantage of the Lyman type "M" expander that Redding is using now in their pistol die sets.
And below the .223 type "M" expander used with jacketed bullets to help reduce neck runout when seating bullets.
The basic problem is the sizing die must decrease the case diameter for the thinnest case. This means the thicker cases are over resized making it harder to seat the bullet and increasing the seating force. Meaning sometimes a bullet will be seated "canted" like the problem you are having. And with the "step" in the case mouth as seen above, the bullet enters the case mouth straight and the problem is eliminated.
Below the Redding expander.
And again showing the Redding die set and the expander in the center.
And another illustration showing the advantage of the Lyman type "M" expander that Redding is using now in their pistol die sets.
And below the .223 type "M" expander used with jacketed bullets to help reduce neck runout when seating bullets.
The basic problem is the sizing die must decrease the case diameter for the thinnest case. This means the thicker cases are over resized making it harder to seat the bullet and increasing the seating force. Meaning sometimes a bullet will be seated "canted" like the problem you are having. And with the "step" in the case mouth as seen above, the bullet enters the case mouth straight and the problem is eliminated.
The last position in my Dillon is a Lee Factory Crimp die. It also sizes the outside of the case if any part of the case is too fat. Guarantees all ammo will chamber.
But crooked bullet seating issue should be addressed. maybe with a bit more mouth flare.
But crooked bullet seating issue should be addressed. maybe with a bit more mouth flare.
