Offset bulges in reloaded ammo

[chutestrate]

I am reloading 10mm with Lee's cast 175gr truncated cone bullets on a dillon 550 with dillon dies. The loaded rounds drop out with an offset bulge where the bullet is seated in the case. They drop freely into my eaa chamber, but not my delta elite or my dan wesson razorback. I removed the decapping pin and ran a few rounds through the resizing die again. Now they chamber in all my barrels.

What is causing this? I can't figure it out. Is the resizing something i shoudn't do?

 

[[email protected]]

the resizing is somthing you shouldnt have to do. When you resize the loaded round it also resizes the bullet to a smaller diameter and you may or most likely have leading. Lets start at the beginning to find out wat is going on. First you are resizing the cases and I would assume that you have no problems there. No bulges or ripples in the brass. Next the expander die. As a rule of thumb cast bullets are sized .001 over diameter so 10mm would be sized at .401. you need to set the expander die so it expands a little more than with jacketed bullets. I usually set mine to where it I can seat the buller by hand enough that it will hold the bullet enough to hold the bullet if I turn the case upside down. If you expand too much you will shorten the case life, Also mose die sets actually have a flaring die not an expander die. Now bullet seating. When you place the bullet onto the case mouth try to get it as straight as you can. If it starts crooked and if there is enough case tension on the bullet as you are seating it then seating stem may not straighten the bullet as it seats. Also how does the bullet nose fit the seating stem? One other thing but I cant help much because I cant remember if the 10mm is tapered on the inside. If is is the bullets may be seating to a depth that it engages the taper and pushes out on the weakest side of the case.

 

[243winxb]

Just saw where the problem was corrected on a Dillion by running the ram all the way up with a shell in each station. Loosen the lock rings and retighten. This is said to square the dies with the shell plate. Don't do the resizing. Plus the bullet seating stem should fit the bullet nose correctly.

 

[918v]

I removed the decapping pin and ran a few rounds through the resizing die again.

You need to stop reloading immediately.

Running a loaded round through the resizing die reduces bullet diameter by .022" at the least. Such a bullet will not seal the bore. It will ride on top of the rifling lands. It will not spin. It will tumble in flight.

You really should understand how firearms work before trying to build ammunition, else you will injure yourself and those around you.

 

[chutestrate]

Well, I think I solved my problem. When I tried casting a few months ago I was using my witness which has a larger chamber than my razorback or delta elite. I did a bunch of measuring and found that my castings come in at .402 and .403. They fall into the chamber loosely, but add the case to the bullet and it is too large.

I loaded a few commercial cast I buy locally, and they fell into the razorback and delta elite chambers as they were supposed too.

The offset bulge was also fixed by belling the case mouth so thank you all for your advice. I'll just reload my castings for my witness, and stick to commercial hard cast bullets for further reloading. I didn't like casting my bullets anyway.

Thank you very much for the suggestions.

 

[Steve Koski]

A tap or two with a hammer will fix that bulge.

Or perhaps there is a problem with your bullet mold. Or perhaps you aren't sizing the bullets after you cast them.

Koski

 

[flashhole]

I cast that same Lee bullet with the microgrooves using the 6-cavity mold. I found I have to run the bullets through the Lee 401 bullet sizer to get really uniform bullets. I also run the brass through the Lee Bulge Buster before regular sizing. I seat the 175 grain bullets so the forward most compression ring on the bullet is flush with the brass. Just the truncated cone sticks up beyond the brass. My entire setup for the 45-70 is Lee. Highly reliable loads and very accurate in my Millenium.

 

[wmurphy]

I ran into the same issue loading truncated cone bullets for .45 ACP on a Dillon 650. since the bullet has a flat top, I used the seater for a semi-wad cutter... That was the problem! Changed to the seater for the round-nose, problem solved.