One in the Chamber

I've seen that reported somewhere, but I can't recall for sure where. It was a couple of years ago. I suspect it was on the 10-8forums, which are closed up now.
 
Different rounds, different guns, different calibers, and assorted other variables all play into the issue. Some rounds are capable of being chambered over and over without any trouble, others may suffer setback with only 2 or three cycles. It really doesn't take that much time and trouble to look at a round and compare it to a factory fresh round and see if there are any obvious problems.
 
Has anyone taken a micrometer and measured a new round, then chambered and rechambered that same round a couple of dozen times and then remeasured the round to see how much, if any, bullet setback there really is?

Would make an interesting experiment and would put to rest this argument/discussion.

I did just this.
I rechambered a Speer Gold Dot 230 grn .45, a Win PDX1 230 grain, and a reloaded 230 grain LRN 10 times each, measuring each beforehand.

The reload setback .1 inch, which I expected with used brass. The Gold Dot also set back .1 inch, which was a bit surprising. The PDX1 didn't budge.

All were run thru my Glock 30, so it depends on the manufacturer, I suppose. I don't concern myself over .1 inch of setback, being more concerned with damaged cases or bullets.
 
If you really mean 0.1" (one-tenth of an inch), that is quite a lot, even for a low pressure round like the .45 Auto. For a .40SW, that could really become exciting! ;)

I don't think one can generalize about this problem all that much by testing a few rounds in a few guns. There are just too many variables. Very similar to trying to decide which .357 Magnum round you trust in your 340PD or 360PD. It is either something you are comfortable with doing with your gun and ammunition or you are not.

My right hand and eyesight are pretty darned valuable to me, and some of my pistols obviously chamber the round with a degree of speed and violence that causes me to think bad things could happen. For the small expense involved, I would rather just not take the chance.
 
I use Gold Dots and emailed them asking about bullet set back and this is what they replied with. This is not recent, it was about a year ago.

What i emailed them " I use your 9mm 124gr +P ammo and was wondering after how many times of recycling the same bullet would setback become a problem? Thanks Bryan P."

Their response " Bryan, I would not recommend re-chambering the same cartridge more than four or five times. At that point the hoop strength of the case mouth can be compromised causing setback.

Austin @ CCI/Speer"

So me thinking that they are playing it safe with 4 to 5 i will rechammber mine 5 times and rechamber at 6 to shoot it as practice ammo. i put a little mark on mine with a black Sharpi to keep count. Some one on here told me thats what they do so i liked the idea and mark mine with a sharpi too. :D
 
Last edited:
The SD ammo in my pistol gets sent down the range at the beginning of each range visit. Then use range ammo for the remainder of the session. Later, after cleaning, it gets loaded up with fresh SD ammo.
 
No matter how you measure it, that will always be cheaper than trying to replace your hand, eye, etc.
 
I did just this.
I rechambered a Speer Gold Dot 230 grn .45, a Win PDX1 230 grain, and a reloaded 230 grain LRN 10 times each, measuring each beforehand.

The reload setback .1 inch, which I expected with used brass. The Gold Dot also set back .1 inch, which was a bit surprising. The PDX1 didn't budge.

All were run thru my Glock 30, so it depends on the manufacturer, I suppose. I don't concern myself over .1 inch of setback, being more concerned with damaged cases or bullets.

.1" is enough to be less than the min COL, hopefully you left a 0 out.
 
Back
Top