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270 Wby brass won't go into sizing die!!

 
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Old 08-12-2008, 06:22 PM
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270 Wby brass won't go into sizing die!!

I got a brand new set of RCBS 270 Wby dies and picked up two different lots of once fired brass totalling 38 pieces. I tumbled all of it and wiped it off. I lubed up with Imperial sizing wax as usual and couldn't get the ram to go all the way down on the brass. I lacked maybe a 16th or 32nd of an inch. I didn't try every piece of brass but none of the brass I sampled from either lot would go all the way into the sizing die. I tried to chamber some of them in my Mk V and they wouldn't go either. What gives? Do I have a die set and chamber that are both close to minimum spec and two lots of brass that came from large chambers? The odds of that seem pretty low but I am stumped. Ideas?

Sam
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Old 08-12-2008, 09:09 PM
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Re: 270 Wby brass won't go into sizing die!!

Has the die been cleaned?
.
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Old 08-12-2008, 10:50 PM
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Re: 270 Wby brass won't go into sizing die!!

Yes, always do that right off the bat.
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Old 08-13-2008, 08:36 AM
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Re: 270 Wby brass won't go into sizing die!!

Put more lube on the lower portion of the case. Imperial is good but it has to be applied fully.

Then push harder.

Then, look at the gap between the die bottom and shell holder top. With the case still in the die, adjust the die down until that gap closes.
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Old 08-13-2008, 11:56 AM
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Re: 270 Wby brass won't go into sizing die!!

I just measured some of the brass just above the belt and it is all pretty consistent at 0.512-0.513". Some fired 7 mag brass to compare was measuring 0.507-5.10" and some sized 300 WM brass was measuring 0.505-0.509". This area of the case seems to be where the resistance is, does this diameter indicate too much head expansion?
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Old 08-13-2008, 12:01 PM
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Re: 270 Wby brass won't go into sizing die!!

According to the drawing on Quickload, the diameter in front of the belt on 270 Weath Magnum should be .512", so that does not appear to be your problem.

Have you tried to remove the depriming rod completely from the equation? Is the rod contacting the web inside the cartridge?

AJ
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Old 08-13-2008, 05:18 PM
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Re: 270 Wby brass won't go into sizing die!!

I think I'm going to call RCBS tomorrow. I have tried it without the expander/decapper rod with the same results. I noticed that there is a line on the brass just above the belt where the die stopped squeezing down the case body and you can literally feel a ring of brass with your fingernail at that point. The sized ones are all like this and none will chamber. Sounds like maybe the die is too tight. I can think of no other explanation at this point. Thanks for all the good suggestions, guys and I'll post on here if I get it figured out.

Sam
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