Case Expansion Questions
Posted 22 October 2012 - 09:06 PM
Anyways, now that you have background, time to get to the question. Measuring case diameters, before and after I am getting some expansion. For instance, just behind the shoulder, I am .006" expansion, about midway down, I am .004" and just above the belt I am at .002". Is this normal? The main reason I noticed, was when I went to re-size my shot cases, and nock out the primers it was a dog with the press, like I thought it was gonna tear the press off the bench or get the case stuck in the die. I measured my cases, both the factory Hornady loaded ones, to the hottest loads I had shot for the day, against the lightest loads, all shot cases were measuring the same. I guess my chamber is just loose, is this anything to worry about? Is there a way to make re-sizing them easier?
PS, love this new Lyman DPS 1200. Got my Winchester 1894 30-30 (passed down to me by my grandfather) shooting great with FTX bullets. Still playing with the 223, have some 40 grain VMax and some Hornady 68 gr Match BTHP to work out.
Posted 23 October 2012 - 04:52 AM
Posted 23 October 2012 - 06:25 AM
Posted 23 October 2012 - 01:04 PM
The chamber in My Tikka is more loose than My Howa, so maybe thats a trait with a Tikka? As far as sizing the cases, I have found that the expander ball in the die needs some lube on it from time to time.If I get a stuck shell, that is usually the culprit. I notice it the most with the larger cases. JMO
I tried it without the ball and decapper in it, still super tight, think its how much the case enlarged due to what Im guessing is a slightly larger chamber...
What caliber is your Tikka in? I need to go home and check some of my .223 cases and see what they mic out at.
try the empty cases's back in the same rifle, if they fit try just resizing the neck, but may not fit in other rifles, have fun stephen
I put 3 empty cases in my magazine, they all cycled through fine...
Posted 23 October 2012 - 01:23 PM
If the cases are properly lubed they shouldn't be too tough to cycle through the press. I'd be more concerned with headspace. Depending on the chamber, setting it back too much can give you problems. Set your dies so it only sets back your shoulder maybe .002".
Posted 23 October 2012 - 01:59 PM
The case is getting super tight with about 1/2" still sticking out, so its not getting anywhere near the neck at that point. I tried a couple different types of lube, didnt help. And I believe head spacing inst determined from the shoulder, but off of the belt, on belted magnums (7mm Rem Mag).
Posted 23 October 2012 - 02:24 PM
Posted 23 October 2012 - 02:30 PM
My Tikka and Howa are in .223. Maybe you should see if a friend has a set of dies that you can try in the same caliber? I have read where Guys have polished the insides of their dies with flitz polish to smoothe out any rough spots. Just an idea.
None of my buddies reload, they all just buy box ammo. I actually just joined the El Dorado Rod & Gun Club, next time I am down there I will check and see if anyone has a 7mag FL die.. I just ordered up a RCBS neck sizer die, Im guessing since the ammo cycles fine, should be fine neck sizing, then the brass wont have to go through shrinking and expanding every time I reload it, hopefully get some more life and accuracy out of it...
Posted 23 October 2012 - 02:40 PM
You could have a large chamber as well. You can look into a bump die as well. Bumps back the shoulder and sizes the neck...but that's how I usually setup my FL dies. Neck sizing almost always requires the shoulder to be bumped back eventually.
Posted 23 October 2012 - 03:06 PM
Posted 23 October 2012 - 05:58 PM
Send it to your smith and have the barrel set back about an inch. That will clean up the old chambering.
Posted 23 October 2012 - 09:50 PM
Posted 24 October 2012 - 03:32 AM
Posted 24 October 2012 - 06:11 AM
I have an old 22-250 that has an upper end saami spec chamber. Depending on what lube I use it can take a bit of muscle to cycle one through the press. I usually use some imperial sizing wax and that gets things moving.
Posted 24 October 2012 - 07:33 AM
Posted 24 October 2012 - 05:39 PM
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