Help with an odd primer strike issue

[cforcht]

OK I just put this gun together from parts. new essex frame and commander slide both in stainless. ed brown firing pin wolf springs throughout. everything is new in this gun. I have fired 4 rounds thru it so far. all have the same deformation. the dents in the rim were there prior to firing. they are reloads purchased at gun show. they work with no problems in my other guns so unlikely its ammo related. any ideas of cause and cure? thanks for any help.

http://www.thefiringline.com/forums/attachment.php?attachmentid=43861&d=1236809106

[niemi24s]

The firing pin indent on the primer shows evidence of very high pressure levels - there practically no indentation left.

The primer looks like it even has a blown-out area!

Render these A-Merc reloads safe, get some decent ammo and shoot a round or two and see what the new stuff looks like.

[Edited: And never, ever buy any more reloads from anybody at any gun show! You could hurt yourself or somebody next to you real bad with them!!]

[cforcht]

ok I will take that advice. not all the rounds were Amerc. only the one I took the pic of and yes I have since been told many times not to steer clear of Amerc brass. seems to be pretty universal. but why doesnt this happen in my other 1911 or my buddies using the same ammo?

[cforcht]

ok I rummaged around and found a single JHP round that was a factory load. threw it in the chamber and let her fly. the primer hit is exactly as you would expect it to be. I would have sworn it wasnt ammo related. but I guess you learn something new everyday. thanks for the input.

[niemi24s]

Which is the location of the firing pin strike: where the hole is or the middle of the brass-colored circular area?

[niemi24s]

Well, as you can see I was busy poking on the keyboard when you did Post #4. Glad the one factory load was OK, but have no idea why the reloads only did that in your new gun and not in any of the others. Weird, huh?

And I can't think of any gun problem that would cause that to happen to a primer unless there was a hole on the breechface next to the FP hole.

Regards

[cforcht]

well there is a little more to the story since you guys had me questioning the reloads. I found if I measured a round out of the box. then cycled it through the gun without firing it. then re-measured the round it was anywhere from .006 to .01 shorter after being chambered and cycled. so that leads me to believe I am getting elevated case pressures when the slug is pushed back into the case while being chambered. I then called my buddy who also bought some of these reloads. asking if hes seen anything odd with them and he replied oh yeah I had a couple I pushed the slug back in the case while loading them in the mag. HELLO...... there's a big red flag. needless to say I wont be buying reloads I dont make myself. thanks for the input and making me look at EVERYTHING

[cforcht]

thankfully I only have one box of these rounds left. think I will just dismantle them and start over.

[niemi24s]

I don't think 0.006" of setback is anything to worry about. Maybe 0.01" would be with a hot load.

But, then again, you don't know how much setback there was on the ones you shot in your gun! Could have been.....GOBS!! :p

Regards

[log man]

If they where getting set back in the mag you can only imagine when they hit the feed ramp and that the charge is all that was stopping them from getting stuffed any further. LOL

LOG

[niemi24s]

Probably the only reason there's not more Kabooms in 1911's is because the 45 ACP case ID starts to get smaller at about 0.30" - the usual seating depth for a lot of bullets.

If the case ID was the same all the way to the bottom.....there'd probably be lots more folks shooting the 1911 with their "weak hand" - other one having been Kaboomed into a bloody stump! :scared:

Cheers