Wow, glad I always check my fired cases and primer strikes. 1911 .40 and a hot day in Arkansas.

PistoleroWadcutterGANG

PistoleroWadcutterGANG

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The load at normal 80 to 90 temps is great. ADD 10 degrees (100 at the time of shooting) and a tad bit of tabletop exposure. Primer strike flattened. Running double tap mag change drills. I always look at my cases and primers after firing. I like the feedback. after looking at the first 4 cases. STOP!

load: (warmish loading).
COAL: 1.150"
Longshot: 8.4grs
Win cases: .845" exact
Fed GM100M primers
H. XTP's 155gr

Hope the pictures are clear enough to see.

IMG_1679.JPG IMG_E1680.JPG
 
hoardingthemanual said:
Whoa that’s some primer flow. So nutty to me how ambient temperature affects ballistics. Tasty looking pie too.
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Hoard if your ever in Flippin, Arkansas you are most welcome for a hot meal and pie! lol (I pulled all those rounds to check) Every powder drop was perfect. Factory neck tension was good. No set back. Scratching my head. A bit scarry that 10 degrees and direct sun exposure would cause such a thing.
 
243winxb said:
Load data is 1.125" And SAAMI maximum is 1.135" if bullets are touching the rifling, it may act like a short* chamber.

*Seen primers like yours in a 45 acp that runs at a lot lower PSI.

It also looks like your not near maximum? Hodgdon data. What does Hornady list as maximum? Anyone.
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Hi 243, before making the loads up I also made COAL test lengths with the 155gr XTP's. 1.125 / 1.135 / 1.145 / 1.155 / 1.165 / (this is as long as the "spacer" mags I have will allow and feed) The Chamber will allow a much longer length. So, I loaded to 1.150 to get a little fudge room in the mags. My loading is straight from the Hornady manual 9 / X "Except" I'm using FED GM100M primers because I'm out of WSP's. I worked up to this current loading. Honestly been reloading since 1975. This is the first I've seen this in my loaded ammo. Going to stop using this load in temps higher than 75.
 
PistoleroWadcutterGANG said:
made COAL test lengths with the 155gr XTP's. 1.125 / 1.135 / 1.145 / 1.155 / 1.165 / (this is as long as the "spacer" mags I have will allow and feed) The Chamber will allow a much longer length.

So, I loaded to 1.150 to get a little fudge room in the mags.
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Good job.

Go with longer working OAL with 40S&W (Loading longer produces greater accuracy for my Glocks and M&P). 👍
 
243winxb said:
Your Primer strikes are off center. If a barrel is not full locked or barrel link it to short or long, this happens. A to long COL may hold the action open a bit. :)
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Not in this instance the barrel is sitting perfect on the foot and link and flush at battery. HS checks out at a perfect .850 MAX (SAMMI numbers/measured). Ammo is loaded to mag length limitations. Not chamber. As for the primer strike point. Hasn't been an issue. Many rounds already through it both factory and reloads. To the point i'm comfortable with it. These RIA's are solid for me.
 
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PistoleroWadcutterGANG said:
We might not see eye to eye but you are always welcome to a hot meal and pie at my house.
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We are all different individuals with varying life experiences as our perspectives could differ based on actual life experiences ... which are both correct.

After being hammered into my head by drill sergeants in the Army and seared "Front sight flash, bang ... Front sight flash, bang" mantra into my brain, when I hit a stage time/accuracy plateau for USPSA I could not improve, top regional match shooters coached me to "Look past the front sight and 'see' holes appear on target".

What? Why? That's so totally different from what I was taught by Army and USPSA local club shooters.

Well, once I learned to look past the front sight and "saw" holes appear on target anywhere at will, fast as I could shoot ... Regional match shooters told me I attained "Zen" of shooting ... And to spread the word to others in repayment ... Which I did to hundreds of shooters - https://www.thehighroad.org/index.p...sight-front-sight-press.835391/#post-11651985

And when my defensive shooting instructor who taught local PD/SD SWAT teams started teaching my class point shooting, he asked us to remove our front sights of Glocks.

What? Why? That's so totally different from what I was taught ...

Well, once we learned to synchronize our "natural point of aim" with point of impact on target, we no longer needed to use the front sight to produce holes on target at defensive distances and now I teach/share point shooting to people starting with "eyes closed" natural point of aim - https://www.thehighroad.org/index.p...hose-with-vision-issues.891558/#post-11996959

So depending on our life experiences, things are correct differently. But that's the human experience. (I have been married going on 29 years and wife somehow points out that I am wrong on a regular basis ... Surprisingly, she is correct most of the times. I don't know how she does that! :oops:)

And yes, I too would gladly buy you a nice steak dinner and a drink.
 
8.4 LS with a 155XTP is not warmish, especially at 1.15" OAL. Looks more like a soft primer that was lightly struck. Last time I saw that was with a SA EMP and its titanium FP. Swapped it out with a steel FP and all primer strikes looked normal again.
 
BC17A said:
8.4 LS with a 155XTP is not warmish, especially at 1.15" OAL. Looks more like a soft primer that was lightly struck. Last time I saw that was with a SA EMP and its titanium FP. Swapped it out with a steel FP and all primer strikes looked normal again.
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powder range in general terms is correct: cool / light 4.5 to 5.9 - medium / 6 to 8.5 - hot / 8.6 to 9+. 8.4LS is warm no matter how you chose to word it. Thanks for trying.
 
I thought flattened primers or crated firing pin indents were signs of high pressure. That picture shows neither of those conditions.

The firing pin hit is off center some and kind of wide in diameter. Federal primers are as soft as they get so that might be part of the why they look the way they do. I wouldn’t be worried about it.
 
I’m with 243, your load is a full grain from max. I’d be looking for something other than powder temp sensitivity. I’d start by pulling a couple of bullets and re-checking powder weight then double-check OAL.

Punch and catch one of those primers and see if there is flow along the sides and near the anvil. I’d be interested in seeing a pic of them. What do other cases fired in the past look like?
 
NMexJim said:
I’m with 243, your load is a full grain from max. I’d be looking for something other than powder temp sensitivity. I’d start by pulling a couple of bullets and re-checking powder weight then double-check OAL.

Punch and catch one of those primers and see if there is flow along the sides and near the anvil. I’d be interested in seeing a pic of them. What do other cases fired in the past look like?
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I agree with pulling them and check. Which already have. Pic in a minute ot two into something for my wife at the moment. hang on
 
Some powders react this way. They are fine right up until the avalanche occurs.

Is there a reason that you load then hot? Defense or hunting application? Did you see any signs of primer cratering before today?

On edit, Federal small pistol primers are known to have a soft/thin cup. I would choose a magnum primer if you are trying to stay at the higher pressure level, and your pistol will set them off.
 
All primer strikes are high of center. SO far after 3.5K rounds through it. Still have not had ignition issues. I fact other than 3 rounds from a different loading meant for another .40SW pistol I've had zero problems. I did send off an email to RIA and a few pictures of the primer strikes I'm getting. That was two days after the initial post. I hope I hear back soon. The pistol has been functionally great. I wouldn't characterize the FP orifice out of spec. The FP is great nice symmetrical / smooth round. Fit is great not a lot of clearance given.
 
I betting the colored off-center strike are an intentional mfc element from RIA. If you think about it if one wants to position a strike for maximum ability to blend the primer wafer disk and eventually break it causing ignition. One bends the wafer at the mean point in the primer cup in regard to primer wafer pinch points. The anvil head point and the side walls of the primer cup. (JUST GUESSING) Hopefully RIA doesn't come back with sorry dude can't help you or worse; In spec enjoy.
 
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