What the heck is going on? with XCR Firing Pin?

3004 Views 12 Replies 5 Participants Last post by TEXAS SOLFTAIL, Oct 6, 2007

smschulz

Discussion Starter · Sep 15, 2007

I went ot clean my XCR after 2 range sessions of about 210 rounds.
I used on the first session Rem UMC, S&B, Fiocci and the last {90rds} S&B.

When I pulled the FP assembly it looked like this:

It had alot of brass marks on it and part of the brass was still in the FP hole! That looked like this:

.....and the brass pulled from the FP hole:

CLEAN it looks this way:

I had absolutely NO failures of any kind ~ this was a shock to me.

So what is the problem ~ Ammo? or FP area?

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1 - 13 of 13 Posts

I find that rifles with rotating bolts running a lot of gas tend to shave more brass, i.e., my 10.5" AR gets more brass on the bolt face than the others.

I wouldn't be shocked if the same holds true for the XCR... are you running it on a forceful gas setting? have you tried turning it down? That would be the first thing I would try if it was bothering me. I wouldn't think it would affect function within a reasonable number of rounds between cleaning as long as the rifle is running fine otherwise.

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smschulz

Discussion Starter · #3 · Sep 15, 2007

ny32182 said:
I find that rifles with rotating bolts running a lot of gas tend to shave more brass, i.e., my 10.5" AR gets more brass on the bolt face than the others.

I wouldn't be shocked if the same holds true for the XCR... are you running it on a forceful gas setting? have you tried turning it down? That would be the first thing I would try if it was bothering me. I wouldn't think it would affect function within a reasonable number of rounds between cleaning as long as the rifle is running fine otherwise.

I have it on #2.
I think that is a less forcefull isn't it?

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ny32182

· #4 · Sep 15, 2007

I believe so.

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smschulz

Discussion Starter · #5 · Sep 15, 2007

I put three full mags (90 rds) thru it today of Aguila 55gn FMJ.
The breech looks quite a bit cleaner.
I am not going to clean it and shoot another 120 rds of the same ammo then pull it out and compare.
If it is anywhere close to the original problem then I'll call RA.

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Kainam

· #6 · Sep 16, 2007

I found this that may be of interest.

http://www.gunsandammomag.com/long_guns/americanar_031807/index4.html

Look particularly at problem #5 and the associated picture.

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smschulz

Discussion Starter · #7 · Sep 21, 2007

I have put 6 mags thru it using another brand of ammo (Aguila) and it doesn't look anything close to the brass-infected pics. I am begining to suspect the S&B as the culprit.

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TEXAS SOLFTAIL

· #8 · Sep 22, 2007

Looks like blown primer to me. Do any of the bullets you shot that day have primers of the same materal you pulled out of the FP hole?

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smschulz

Discussion Starter · #9 · Sep 22, 2007

TEXAS SOLFTAIL said:
Looks like blown primer to me. Do any of the bullets you shot that day have primers of the same materal you pulled out of the FP hole?

I never even thought to look at the ejected shells as I had no failures.

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smschulz

Discussion Starter · #10 · Sep 25, 2007

New picture of uncleaned after 270 rounds of Aguila 55gn FMJ.

Compare that with the clean and brass-infested pics.

Must be the S&B ammo ~ will try another brand and retry S&B again to compare.

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TerraShrewsbury

· #11 · Sep 25, 2007

keep in mind, brass sheds on everything... We use this little brass tool to tighten on certain gun parts, and we have to be very careful with it, because too much pressure leaves a big, ugly brass mark on the stocks. Maybe your ammo was an odd batch, made with a lower quality brass?

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smschulz

Discussion Starter · #12 · Sep 26, 2007

TerraShrewsbury said:
keep in mind, brass sheds on everything... We use this little brass tool to tighten on certain gun parts, and we have to be very careful with it, because too much pressure leaves a big, ugly brass mark on the stocks. Maybe your ammo was an odd batch, made with a lower quality brass?

Yeah, I am pretty sure it's the S&B Ammo ...must be something different abiut the brass mixture. I had a similar situation with S&B 7.62 x 39 in my SKS. It's kind of unexpected as I have never had any problem wit S&B pistol ammo.

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TEXAS SOLFTAIL

· #13 · Oct 6, 2007

LOOKS BETTER! What gets me is the brass pulled out of the fireing pin hole.

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