Case stuck in chamber, primer leaked at edge

[Webster]

Brass is all Wolf with the same number of firings [2] Bought from Wolf when they were selling primed brass.
Neck tension is between 4 and 5 [I like 3 but I sent all this brass out for processing]. All trimmed to 1.750 +/- 3.
Barrel is 24".
I'm using ASC and PRI mags - both have room for up to 2.31 COAL. I'm using 2.290 COAL so there is no crush of the bullet into the powder. Even though the fill is only 97%, using a Dillon powder measure tends to fluff up the powder.
No lube in the necks.

Post #5 your just dropping the charges without weighing. Why do you say it's not a hot charge in your rifle when the manuals and computer programs say it's near max? You say you have proof you have a very tight chamber. This alone should raise pressure and mean that recommended max. loads are meaningless.

It might be interesting to measure the volume of a new unfired case, a sized case and an as fired case. If you have a tight chamber there is less space for the case to expand when the powder goes off. Same as a case with less volume. Peak pressure might be higher with less room to expand. Your picture shows serious damage to your bolt face. You must have high pressure to blow out the primers. What do the pimer cups look like when the gun goes off normally. Common sense should indicate backing off for safety.

I would guess that your at a pressure level that sometimes exceeds what the primer cups can withstand. What happens may depend on the stackup of variables (powder charge variation, cup dimensons, case head hardness, primer strength, case primer hole dimensions.

 

[jelenko]

Post #5 your just dropping the charges without weighing. Why do you say it's not a hot charge in your rifle when the manuals and computer programs say it's near max? You say you have proof you have a very tight chamber. This alone should raise pressure and mean that recommended max. loads are meaningless.

It might be interesting to measure the volume of a new unfired case, a sized case and an as fired case. If you have a tight chamber there is less space for the case to expand when the powder goes off. Same as a case with less volume. Peak pressure might be higher with less room to expand. Your picture shows serious damage to your bolt face. You must have high pressure to blow out the primers. What do the pimer cups look like when the gun goes off normally. Common sense should indicate backing off for safety.

I would guess that your at a pressure level that sometimes exceeds what the primer cups can withstand. What happens may depend on the stackup of variables (powder charge variation, cup dimensons, case head hardness, primer strength, case primer hole dimensions.

As I mentioned in my last post, I'm not using BLC2 anymore. In checking the GRT file, it showed 46.7K psi with 26 gr of BLC2 - I'm thinking that's not into the 'high pressure' range.
Also in my last post I mentioned that the Win 41's continued to leak occasionally with 25gr of SWM and H68's that GRT showed as 47K psi. Also, as mentioned, there have been 6-7 Win 41's that leaked out of just over 5000.

I'm not seeing 'serious damage' to the bolt face. There is a divot where the primer leaked at it's edge.
No primers have been blown out - did I say something that led you to believe some had?

I handled the tight chamber by not using brass from the first processor. All the brass from the current processor fits fine. In any case, that barrel has been retired for more than a month.

Primers all look fine - still rounded at the edges; no ejector swipes.

 

[jelenko]

So how much Jam do you have with a SMK 69 at 2.290”? I ran those back about 0.050” shorter in a Wylde chamber

Jeff - There isn't any jam.
On the current barrel, I get touch at 2.410 with a S69. But this barrel [Krieger from WOA] has 80/1000 wear. So, a new one would touch at 2.330. I actually checked that when I was considering loading to 2.290.

 

[bobcat93]

Those 223 cases are notorious for getting case lube and cleaning meadia caked under the shoulder while tumbling. Then the glob gets a nice dusting of meadia powder and Vala it's vanished...only to be noticeable by a trained eye or some one who pushes there AR's.
Every time i tumble cases i tap out the meadia and blow compressed air to clean case with blow gun through primer pocket.
Case after case after case..it sucks but once i place cases in a loading block i can hit the inside of all the case necks with a little flash light and inspct them a bent Q-tip i wipe inside under case wall-shoulder & shoulder neck before priming
I use to use sonic cleaning method just depends what im cleaning..LC brass good to sonic clean remington brass not so good.
Perhaps a glob of goo was the issue. A little fine tuning in the reloading process could help..
Hope it was helpful some how.
Its kind of off topic but have you tried the IMR 8202 XBR powder ive gotten good results out of my AR with that powder and 69gr SMK's or Nosler Custom competition bulk bullets

 

[jelenko]

tried the IMR 8202 XBR powder

I used it for several years with H75's, S80's and B80.5 and now S77's. All produced great loads.
FWIW, I'm not buying any more after the current stock - price is too high.
I'm experimenting with N140 and N135. Great groups with S69's so far.