Sticky extraction

[Timfoilhat]

I took my Kimber K6S to the range today and ran .38 spl load work ups for both HS6 and Titegroup over the chronograph.
In the +p loading of HS6 the cases were a little sticky extracting. I checked the cases and there were no signs of excessive pressure. I moved on to my titegroup loads, up to +p and no further issues. Is it possible that HS6 stretched the brass to fit the cylinder that tight? The +p TG load achieved higher velocity and had no extraction issues.

 

[contender]

Well,,, there are some questions.
Was the brass used identical? Meaning, both lots having been fired the exact same number of time with identical powders prior to this? Were they all brass,,, or some nickle?
Were they loaded on the exact same press & dies?
Same primers?

Now,, with all of that,,, lets assume everything is similar.

Titegroup is a fast burning powder. HS-6 is slower. They are far enough in the burn rate chart to where this is more likely the issue. If I had to GUESS as to why you got sticky extraction,, I'd say it was more likely the dwell time of the burn rate that allowed the cases to expand a bit more when using HS-6. Peak pressure burn happens at different places in a gun, depending upon the charges, the bullet weight, the crimp, & many other variables.

 

[Catfish]

Sounds like Titegroup wins then. It’s a better choice for 38 spl anyhow iMO.

 

[Timfoilhat]

Well,,, there are some questions.
Was the brass used identical? Meaning, both lots having been fired the exact same number of time with identical powders prior to this? Were they all brass,,, or some nickle?
Were they loaded on the exact same press & dies?
Same primers?

Now,, with all of that,,, lets assume everything is similar.

Titegroup is a fast burning powder. HS-6 is slower. They are far enough in the burn rate chart to where this is more likely the issue. If I had to GUESS as to why you got sticky extraction,, I'd say it was more likely the dwell time of the burn rate that allowed the cases to expand a bit more when using HS-6. Peak pressure burn happens at different places in a gun, depending upon the charges, the bullet weight, the crimp, & many other variables.

All brass, not all the same manufacturer. All brass was trimmed prior to loading so the length and the crimps should have been consistent. All loaded on the same T7 press on the same day. Same CCI 500.

I'm with you thinking it's related to dwell time/peak pressure. It's just I have limited experience so I like to ask.

on a separate note, the HS-6 fireballs were impressive, and I don't think that's a good thing. The look of Horror on my wife face when I told her she gets to shoot this one next was priceless.

 

[JRV]

How do you clean your chambers? .40 cal bronze brush soaked with Hoppes? Maybe spun up in a drill? .40 cal Boresnake?

 

[Timfoilhat]

How do you clean your chambers? .40 cal bronze brush soaked with Hoppes? Maybe spun up in a drill? .40 cal Boresnake?

The gun's new and only had maybe 100-120 total factory rounds through it so far. I've cleaned it up after the first 50 with q-tips soaked with Hoppes, followed by patches on a jag, followed by a boresnake.
The HS-6 was my first re-loads run through it.