Brass Stretching Question

[mikecr]

I just checked the once fired cases in my rifle and they chamber smoothly and completely without any full length resizing so I am going to neck size them, trim to length and let them go.

There is never a reason to size or trim -until needed.
That chambers are so different with the same cartridge just shows how bad our standards really are.

 

[MGYSGT]

Lever guns are like auto guns. They stretch brass. Set your die to resize your brass as little as possible and still load in your gun. Trim to length every so often (3 shots or so)

 

[duurmeehr]

Update.

Pretty sure I see the problem, I don't know how I missed it. I was sure I tried my no-go gauge but evidently not.

The no-go gauge closes in the action.

Using a lock-n-load shoulder comparator, a fired case measures .010" LONGER than my no-go gauge measures with the same comparator. That's .006" longer than even a field gauge.

 

[duurmeehr]

I'm not sure if that is actually unsafe if I only neck size and the brass is already stretched?

I put a call in to Browning but they were closed already this afternoon.

I hope there is another answer and I don't have to send a new gun back the day before my deer season opens.

Thanks to all for the help.

 

[243winxb]

Try a field gauge.

 

[duurmeehr]

Try a field gauge. View attachment 1293951View attachment 1293951

Field gauge closes also.

Beginning to wonder if there is a problem in the rotating bolt. Action feels like it closes properly.

Came this way new if it is.

All two boxes of shells did it.

 

[dellet]

Field gauge closes also.

Beginning to wonder if there is a problem in the rotating bolt. Action feels like it closes properly.

Came this way new if it is.

All two boxes of shells did it.

A little late to bring this up, but using go/no go/field gauges in a lever gun is a real bad idea. Tho it might be why they seemed to work the first time, and now fail.

The camming action of the lever makes it real easy to force the gauge into the chamber ruining one or the other. A false reading is almost a certainty.

Next is basically you’re using the wrong tool. The Sinclair gauge insert is designed to rest on the entirety of a shoulder. So if the insert is a true 40 degrees(20 per side), and one chamber is 39.5 and the other 40.5 you will have a completely different contact point and length. This will also be true if the sizing die produces a different angle than the chamber. It’s not designed to make an accurate measurement.

It’s not fair to expect the tool to compare two different chambers with it and expect accuracy in the numbers unless they were cut with the same reamer, same day.

If you want to measure headspace, you will need something with a .400” diameter. Then judging which chamber is longer than the other won’t get lost in the other factors.