The post whore thread.

[Great-Kazoo]

Im cheap. I'd buy this: http://t.harborfreight.com/1-1-4-qua...xer-91907.html

The plastic / resin tub of the lowes unit outweighs the price difference, when it comes to potential brass damage. IIRC rondog used a HF mixer and did some alteration to it.

[BuffCyclist]

Interesting. Just ran a quick test with the WFT on 5 cases after setting it up again after setting up the tool with one 1.745" FC Case.

Two of the cases went to 1.740", while the other 3 wouldn't go below 1.750" (even with trimming them 3 times). Looked at the headstamps, the 2 that went low were FC and LC. The 3 that were high were RP. How peculiar. I hypothesize that the shoulders of different brass manufacturers will be different and therefore, the final trim length will not be the same amongst differing manufacturers. Let's proceed with an EXPERIMENT!

Pulled out 20 cases of varying length, then sorted by headstamp and trimmed them all in 1 go (ie drill still running the entire time).

Out of 9 RP -- 1.748" Average Post Trimming = +0.003" Deviation from Target
Out of 4 Win - 1.748" Average Post Trimming = +0.003" Deviation from Target
Out of 6 LC - 1.743" Average Post Trimming = -0.002" Deviation from Target
Out of 1 Win - 1.751" Post Trimming = +0.006" Deviation from Target

My hypothesis was correct based on this low sample experiment. In order to fully verify my results, I need to analyze a larger sample volume. So, I will sort through and find 25 of each headstamp, measure, trim, measure and calculate deviation from nominal (ie 1.745").

Stepping back, this isn't that surprising as different manufacturers of brass use different molds/dies/processes/etc to form their brass. I just didn't realize there would be this much of a deviation. If this is the case, then it looks like I'll be sorting all of my rifle brass by headstamp, trimming and keeping separated. It will make it easier to pick out cases of similar length for precision loads.

Stay tuned for another report.

[HoneyBadger]

Thanks for the good report BC. It's nice to see things examined scientifically. I guess its a good thing that I've been sorting my brass by headstamp.

[BuffCyclist]

That's all I have time for now, I just ran through 25 of RP and FC, here are results:

Out of 25 RP - Average = 1.748” - Std Dev = 0.004”
Out of 25 FC - Average = 1.742” - Std Dev = 0.002”

I'm attributing the smaller standard deviation of the FC cases due to my setting up the WFT for a 1.745" FC case, so the shoulders will be the same. My guess is that if I were to setup the WFT to a 1.745" case of each headstamp when trimming only that headstamp, the results will become more consistent across the board. I'm keeping a spreadsheet and will update it as I trim cases. I'll probably end up starting a full thread on it in the reloading forum, but not for a while.

[waxthis]

Ya, its Friday....Stay tuned for Indian Taco pics..

[waxthis]

Oh my bad...Seemed to have entered the reloading forum again.

[mcjhr]

Hah! Indian tacos.....you mean at like Tocabe?

Those are awesome!

[BuffCyclist]

Oh my bad...Seemed to have entered the reloading forum again.

No worries. Sometimes people come into the reloading forum to clutter our pages with utter nonsense and these weird camel videos. Not sure what that's about.

[mcjhr]

Don't feed the camel's.

[waxthis]

Yummy!