once fired brass wont chamber???????

[Craigyboy]

Having a wee problem with once fired brass, I loaded up 25 tonite and went to try them out I noticed the bolt was tight to close down on some of them and on 2 I couldnt get it too even close. This is only once fired brass that I have only started using recently as my other batch was done. I checked all dimensions between new brass, the brass that chambered and the two rounds that didnt chamber and compared

headspce was consistent to within .001

case head was spot on everytime .372

widest part of the body was spot on everytime at .379,not on new brass though as my chamber is quite losse so once fired brass fills it out but it was the same between the brass that chambered and the brass that wouldnt chamber)

case neck .226-.227,spot on)

the brass definately doesnt need trimmed as at its longest it 0.030 off the full length of the chamber.

the only thing I can visually see is at the base of the case neck on the one of the rounds that wouldnt chamber is it flows out toward the shoulder instead of straight down. I have only neck sized 1/2 the neck on the first loading of the brass and the second loading, I dont lube as my previous brass never needed it, could the new brass need lubed and therefore when I neck size its sligthly catching pushing the case neck downwards on the up stroke due into the neck sizer die to too much friction catching the brass instead of pushing over it, and making thee brass bulge out therefore not allow the case neck too enter the chamber? Though surely this would happen on my first loading as well as I neck size in the same way or maybe each time I size it gets a bit bigger? They definatley couldnt need full length sized as headspace is consistent with brand new brass as in once fired brass. I am open too all ideas and opinions as I am still quite new to this relaoding game and am a bit stuck on this one.

Its not all bad though I have hit a nice laod, after I had this problem tonite I just blasted off my last few rounds and shot a nice 5 shot .350 group without trying much

 

[243winxb]

the unsized part of the neck will keep expanding till about the 3th or 4th firing. You can feel it when you close the bolt. On a factory size chamber, the step between the sizes and unsized neck can easly be seen. But it still should chamber.

 

[243winxb]

Or it could be a donut if you made brass from another caliber, like sizing 308 down to 243. More info on caliber, gun, dies etc. would help

 

[Craigyboy]

its a .204 ruger and I am using already formed winchester brass, redding deluexe dies, its really bugging me this one, the rifle is a cooper m21.

 

[Craigyboy]

just been doing some more checking today at this, coloured the offending round's in with black marker and tried to chamber, it seems to be on one side just before the shoulder, I checked where it was and it lined up with the E in winchester at the case head so I rotated the round and it chambered with the E facing left or right but not up or down????????? The size just before the shoulder is coming up at .360-361 on most of my once fired brass, whereas brand new brass comes in at .354-.357 but due to my loose chamber I think this is why it grows, I cant find the case to be much out of round though I dont have the right tool and am just spinning the round around in the calipers while keeping the pressure on them and its not revealing anything,obvisouly not a great technique). I would really appreciate any help as I am stumped!

 

[rstreich]

Could it be that your neck die sized the case a bit around the shoulder and pushed it up a bit?

 

[243winxb]

If you are using a Full Length sizing die to size only part of the neck, this is your problem. As said above, you are moving the shoulder. YOU would have to buy a neck sizing die or a bushing die to only neck size part of the neck. I use the Redding type-S Full length sizing Bushing die for my 243 win. This die lets you size only part of the neck if you wish. And you can choose to use the expander, or NOT to use the expander with necks that are turned.

 

[vtammo]

I have a DIAL INDICATOR MEASURING TOOL w/ Magnetic Base & Set of Tips if you are interested.

The Case and Cartridge Inspector provides you with the ability to measure the critical dimensions: neck wall thickness, case neck concentricity and bullet run-out. Measurements are in increments of .001." Checks both the bullet and case alignment in relation to the centerline or axis of the entire case. Also detects case head separation before symptoms are apparent on the outside of the case.

This unit has a magnetic base that allows it to stand alone or be attached to any flat or round surface. It also has a fine adjustment feature the RCBS and other measurement tools do not have. The fine adjustment feature let you set the dial indicator to the correct height with ease making it much easier to set up.
The base used to hold the brass is not shown in the picture. The base has four ball bearings for the brass to rotate on. It is much easier and smoother to use than the units with a v-block. I can take a new picture if you are interested.

Included is a set of tips for the dial indicator making this a great tool to use with your lathe, ect..

I think this is a pretty good value with the added features the other units don't have. The magnetic base that turns on/off-a $25 value, the set of tips-a $20 value, and the Fine Adjustment feature-a $15 value. The RCBS, Forester and other gauging tools sell for about $75 to $90 making this setup worth well over $100 in comparison.

Price-$60
Shipping $9 anywhere in the U.S. Ask for shipping cost to other countries.

Email me with any questions randylilley@comcast.net

The dial is 2 1/4" with a one inch travel, .001 measurement.
Magnetic base is 2.5x2x2, 10 in. tall with a 7.5in. fine adjustment arm.
Shell holder base 4”x7” w/ four ball bearings.
22 piece point set.

Randy