another 30-30 reload question case length problem


March 20, 2005, 11:37 PM
Before resizing my 30-30 federal once fired shells are around 2.025 -2.030 length but after full length resizing in hornady new dimension dies the case length grows to 2.043 and beyond. Consequently requiring trimming. I'm I doing something wrong?

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March 21, 2005, 07:17 AM
Your expander ball is puolling the neck back out, try some mica or graphite inside the neck.

March 21, 2005, 09:06 AM
I agree, sounds like the expander ball is the culprit here. You may also want to take out the rod/expander ball from the die and spray it down good with a case lubricant like Hornady's. You may have to repeat this procedure every 100 rds or so to keep it "slick".

The Bushmaster
March 21, 2005, 09:49 PM
And if you are using a RCBS pad and lube, make sure that you are using the brush and lube to lube the inside of the case neck besides the outside.

March 21, 2005, 11:59 PM
Do you just leave the lube in there,or do you have to remove it to not have it migrate into the powder.
I too have problems with my expander ball stretching my 30-30 cases.:(

The Bushmaster
March 22, 2005, 01:21 AM
SASS#23149. I assume the you are refering to my running a bore brush into the neck of the .30-30 case. In as much as I use very little lube on the brush I have had no problem with migration of the lube to the powder and I have left these loaded rounds on the shelf for months. When using the RCBS pad, as you know, you roll several cases on the pad then resize them. I also roll the bore brush across the pad then do about 5 case necks and repeat the prosess. I usually roll 5 cases at a time so it makes it easy to keep track of where I'm at. After resizing, the cases are put back into my Lyman 1200 to tumble for at least an hour. This should remove what lube that is left. You will have some case lengthening but it is at a minimum. some cases don't even need trimmed. I do my .30-06 cases the same way. I can usually get two firings before I have to retrim. When I used the Hornady case lube I had to trim all twenty. That included all 20 of the .30-06 cases too. I hope this answers your question.

March 24, 2005, 05:52 AM
The answer to your question was in your basic data you proffered.

After the initial fireing, the cases have been stretched to your chamber dimisions, which in the case of the .30/30 can be considerably larger than that to which your dies will size to.

After the initial sizing, you will almost always have to trim OFB brass in .30/30, as most come from the factory trimed to near max length, and will "grow" significantly with the first firing and resizing.

You can limit the amount of "stretch", by only sizing your brass to where the die just "KISSES" the shoulder of the case. There are several ways of determining this, discussed in most of the manuals.
Don't just screw the sizing down to touch the shell holder, as with most dies except for the Lee's, this will cause it to grossly over size the case setting the shoulder back as much as 1/8" further back than it needs to be. This will result in large case stretching and fast case failure. I have some older RCBS and Lyman .30/30 dies (circa 1970's) that size the shoulders back considerably further than necessary or appropriate for the assorted .30/30's I've had and loaded for (2 b/a, 1 s/s, 7 or 8 l/a's !!). Yes, I have 3 sets of .30/30 dies; Lee, Lyman, and RCBS !

Even with warm loads in my lever action .30/30, I seldom have to trim until after 7-10 loadings, and get 20+ loadings from my cases. But I ALWAYS trim after the first firing and sizing.

I have about 2 life-times supply of .30/30 brass I've picked up at public firing range. However, I hate having to trim, ream, and prep new brass! So, I do whats necessary to avoid having to "prep" new cases!

March 24, 2005, 07:58 PM
AS has been mentioned, I always full length size after the first firing. When reloading after subsequent firing, I size the shoulder area. When the cases stretch past about 2.029, I discard them.
I have a LOT of 30/30 once fired brass, so I don't worry about running out.
Thats a good tip also, about keeping that expander ball lubed while loading.

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