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300 blackout resizing problems Help!

3K views 6 replies 5 participants last post by  drymag 
#1 ·
Need help with a little problem!
I am reloading 300 blackout with these bullets
http://palmettoprojectiles.com
203 grain poly coated bullets
I tried seating a couple rounds sans primer and powder and The case just shaved the bullet when I tried seating it.
I measured the bullets and their outside diameter is .308
No surprise there so next I measured the case after resizing and it to is .308
I have a lee classic turret press and the lee dies as well. So I took that apart. Next I measured the recapping tool and it measures .305 at its widest point.
Any ideas? What's going on?
Pulling out what little hair I have left!
 
#3 · (Edited)
Need help with a little problem!
I am reloading 300 blackout with these bullets
http://palmettoprojectiles.com
203 grain poly coated bullets
I tried seating a couple rounds sans primer and powder and The case just shaved the bullet when I tried seating it.
I measured the bullets and their outside diameter is .308
No surprise there so next I measured the case after resizing and it to is .308
I have a lee classic turret press and the lee dies as well. So I took that apart. Next I measured the recapping tool and it measures .305 at its widest point.
Any ideas? What's going on?
Pulling out what little hair I have left!
You say you measured the "recapping"tool. I think you mean the expander-decapping rod and the widest point on that should be the expander ball. The expander ball resizes the interior of the neck on the upstroke of the press and, the inside diameter of the neck should be smaller than the bullet. Hence the .003 difference. That difference allows for case neck tension on the bullet. Case neck tension needs to be adequate to prevent the bullet being pushed further into the case as the round is chambered. It is also required to prevent the bullet from jumping forward due to recoil in cartridges that remain in the magazine. I use RCBS dies and make it a practice to adjust my seating dies to add a little case neck tension by crimping judiciously. Consequently, I've never had problems with bullets staying put where they were seated.

Slayer's comment on flaring case necks when using cast bullets is directed to your shaved bullet issue and will resolve that.
 
#4 ·
I initially thought this Lee tool was lame until I tried it in the drill press or quick hand drill. It burnishes more than shaves away the brass. It helped take the sharp edges off the brass (chamfer/debur) and eliminated shaving. My sharper hand chamfer/debur) tools took too much off the brass. Not a tool problem, just my heavy hand. The hex edged part goes into the press. Using a 1/4 turn on the shell holder loosens the tool to remove a piece of brass and insertion of the next. Tighten and repeat. The shell holder isn't the shell holder for a press, it's a shell holder for a hand primer tool that has threads indie of it to allow the two pieces to screw together. Saw this on you-tube some where. Might be of some help.
 

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#6 ·
That is exactly the way I deburr/chamfer my cases. I use the LEE gauge and cutter to trim all of my rifle brass (except .223) and I put the stud of the shell holder in my wireless drill for ease of cutting. When I pull the gauge out of the brass, I immediately pick up and use the little deburring tool and about a second or two inside and out they are done.
 
#7 ·
Not an idiot. Were all continuing the learning process in this hobby. It seems to never end. Fortunately the forum community shares and we learn and are safer for it. You had some good logical approaches to your initial stated problem. We've all been there, done that, and periodically repeat said process of pulling hair.
 
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