Round circles when i'm seating bullets

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  • Last Post 01 January 2017
Japroios posted this 01 January 2017

I am new to bullet casting.

I am casting range lead with the Lee C312-185-1R and using the lee .314 sizing die to seat my gas checks.  

While seating the bullets with the lee Dead Length Bullet Seating Die, a circle is formed on top of the bullet.  

I am not sure if accuracy is affected since I have always worn thick glasses.....

   I am shooting a Enfield, Mark 4, No. 1.

I believe that the Bullet seating die is causing the indentations...How is this resolved.

Thank you and Happy New Year!!!

 

John

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RicinYakima posted this 01 January 2017

You are required to have a third die, one that has a plug that expands the inside of the neck and forms a bell in the case neck. That will let the bullet smoothly entry the case. The most common are the Lyman “M” die. Plus your seating die may be screwed to far into the press. You do not want any crimp.  HTH, Ric

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John Carlson posted this 01 January 2017

Sounds like your seater plug does not match the shape of your bullets.  In some cases you can get replacement plugs in different shapes or you can have your current one ground to match.  Unless the marks you describe are deep I doubt there is a significant degradation in accuracy.

John Carlson. CBA Director of Military Competition.

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onondaga posted this 01 January 2017

Japroios

The Lee seating dies have a universal shape for all bullet styles and some can ge reversed for flat noses but sometimes plug edge is sharp and need the edge of the seating plug hole chamfered. I just remove the plug from the die and use a rubber abrasive bit in a mototool. I just radius the edge by rotating and blending to round the edge. 

That die is designed for seating jacketed bullets but is generally suitable for cast bullets also. I had to do the same radiusing on my Lee seating die for that same bullet I use in 30-06, .308 and 7.62X39. I radiused 3 seating dies for that bullet and it does not effect using the die on other bullet styles.

 

What you have is not an off the wall problem, it is a common one discussed here many times.

Lee is aware of this and offers a service to radius your die part when you send them your die and some samples of your bullet but it is really EASY with a dremel and a rubber point and no snail mail time.

 

Gary

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onondaga posted this 01 January 2017

Japroios

the Lee C312-185-1R is also a terrific Deer hunting bullet when hollow pointed with the Forster (large 1/8") hollow pointing tool in a drill press on loaded ammunition with the C312-185-1R. The tool is very inexpensive, self centers great during use and improves terminal smack. The tool:

http://www.midwayusa.com/product/371968/forster-universal-hollow-pointer-1-8http://www.midwayusa.com/product/371968/forster-universal-hollow-pointer-1-8

 

I cast that bullet in Lyman #2 for hunting load level ammunition and use Aluminum checks. My loads are 2,020-2160fps with H4895 and I tumble lube once before size/check and twice after with Whites Deluxe 45:45:10. I have 3 rifles that easily group that bullet under 1"@50 yards and it kills Deer well to 150 yards

 

Gary

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