6.5x 55 Swede Head Space Gauges *** Updated with Pics

[Pathfinder]

This is not a sportered Swede......its an original 96 full stock.

All the more reason to have it checked out.

 

[cosmic]

OK - One last kick at the can...

Your post states that you removed the decapping pin when you resized the brass. Did you just remove the pin, or the complete rod with the expanding ball? If you did the latter, you will size the neck down to a smaller ID than normal. This would give you more neck tension, particularly if the brass is thick.

Suggest you measure the OD of the neck for a fired case, and one of the unfired cases - it would be worth trying to establish the wall thickness of the brass.

 

[rodagra]

I have a last kick at this can too. When you were cleaning the bbl. did you notice any increased resistance on the patch at a particular point as you shoved it down the bore on the first 2 or 3 of the 20 passes?

 

[7.62mm]

OK - One last kick at the can...

Your post states that you removed the decapping pin when you resized the brass. Did you just remove the pin, or the complete rod with the expanding ball? If you did the latter, you will size the neck down to a smaller ID than normal. This would give you more neck tension, particularly if the brass is thick.

Suggest you measure the OD of the neck for a fired case, and one of the unfired cases - it would be worth trying to establish the wall thickness of the brass.

No....I just remove the pin....RCBS dies...I then reinstalled the collet nut, or whatever you want to call it.

OD measurement of the blown primer case neck is .2985
OD measurement of first shot case neck is .2990
OD measurement of one of the Unfired case neckis .2920 (this is after the bullets were pulled, to check my charge weights)

 

[7.62mm]

I have a last kick at this can too. When you were cleaning the bbl. did you notice any increased resistance on the patch at a particular point as you shoved it down the bore on the first 2 or 3 of the 20 passes?

I can't say for sure if there was any one spot, and I see by previous post that I missed putting min. as in spent 20 min, was a lot more than 20 passes with the brush and patches with CR 10.

 

[TwoTone]

When you fire it again, if a progression in pressure signs happens again, you will know that something is building up somewhere to increase pressure. The most likely place would be the barrel.

If you don't get a progression then we'll still be in the dark as to what caused this but at least you'll be able to continue on with load development.

It should be interesting.

 

[John Y Cannuck]

Okay....

I can say that all three rounds chambered easily...no resistance.

I was under the impression that is was standard procedure to to lightly chamfer the inside and outside of fired cases,,,,,I have been using the Lee chamfer tool to do so,,,,just a couple of turns each

After trying to chamber the empty cases, try seating a bullet by hand again.
That will tell you if the chamber squeezed the case mouth a bit.

 

[Jordan Smith]

So you are cleaning the resizing lube off of the brass after you resize, right?

 

[7.62mm]

After trying to chamber the empty cases, try seating a bullet by hand again.
That will tell you if the chamber squeezed the case mouth a bit.

Bullets slide easily in to the case after it has been rechambered

 

[7.62mm]

So you are cleaning the resizing lube off of the brass after you resize, right?

yes, I clean and inspect each case before it goes into the cartridge box that I use for storing and transport

 

[bigrigdawson]

what is the max c.o.a.l for your chamber?