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Hammbone

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About Hammbone

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    Finally read the FAQs

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    Iowa
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    Scott

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  1. I've done a few capability studies on my Lee Auto Disk as well as my Lee Auto Drum. To do a true capability study, you need more than 30 specimen (30 drops). I calculated a Cpk, but it's a bit skewed because you have to have an upper and lower control limit that is set by the tolerance, which in the case of dropping powder I don't know what that is. If it were a print dimension for a part I make, that's determined with GD&T tolerance stack up, but in the case of reloading, it's arbitrary. Nonetheless, I decided to use ±0.1gr as my tolerance. It turns out my Lee Auto Drum is has a Cpk of 0.43, which is horrible! Cpk tells you what percentage of your product (or powder drop in this case) is going to fall within spec. Here are process yields for some various Cpk values: Cpk Process Yield 0.5 86.8% 0.8 98.4% 1.0 99.7% 1.2 99.97% 1.33 99.99% In manufacturing, a LOT of money is spent on tooling and process controls to achieve a Cpk of 1.33 or higher! I would suspect one would have to spend a LOT of money on custom built reloading equipment to do the same. I think I'll spend more time and energy perfecting myself before I worry any more about what my powder drop can do.
  2. I agree 100% with this!!! I have found that the user (ME) operating the firearm has more variation than any other component or step in my process of reloading. I have cooled way down on fretting over the details compared to when I first started. Now, if I were doing long-range bullseye rifle, that might be a different story.
  3. I would love to know you're equipment's capability of holding 0.05gr. Not only your dispensing equipment, but your measuring instruments as well. If you can pull it off, I want to know how you're doing it! I'm not be sarcastic, I'm serious. I fret over details like this.
  4. Sigh... short answer, yes. Drives me nuts. I've done said test but don't have it accessible right now. After being involved with doing gravemetric tests at work for cleanliness, trying to accurately measure down to 10mg with less than 1mg variation in a gauge R&R, I realize how inaccurate reloading equipment is. We bought a $7,000 scale in order to pull this off. I tried to buy outer old scale but no luck.
  5. My Stock 2 (with reamed throat) does the following with 147gr and N320 @ 1.142" COL: 3.3gr - 893fps 3.5gr - 949fps 3.7gr - 970fps 3.3gr is most accurate of the three.
  6. Here's my comparison between the manual vs what I actually measured (upper table). The lower table linearly interpolates a velocity based on the user entering a charge weight. These numbers are linearly interpolated from the upper table.
  7. I'm the proud owner of a new Stock II. Joe at Patriot Defense hooked me up with all the goody aftermarket parts too. So basically I have an Xtreme in standard Stock II cloak. Nonetheless, I'm new to this polygonal barrel. I use Hi-Tech coated bullets. I have a few 135gr laying around, but a lot of 147gr. These are similar to Bayou's, but they're made locally to me. The biggest difference is that these do NOT have a lube groove. I'm also sitting on 4lbs of Vihtavuori N320. I loaded up some experimental loads over the weekend and tested them out. A few at 3.5gr and a few at 3.7gr. COL was 1.142" (length to ogive was 0.838"). Then I chronographed 10 of each load. I can tell you they move a LOT faster than the Vihtavuori manual suggests. Here's the deal: I thought I had a game plan going into this, but now I'm second guessing myself. So the question is; what works well in Stock II's with 147gr hi-tech coated bullets and N320?
  8. Ah hah, great point. I'll keep that in mind. And yes, I believe the Stock2 in question is a large frame.
  9. I'll try to get some pictures posted when I get to my computer.
  10. I have a 22lr conversion for my Witness Elite Match large frame. I'm looking at selling the Match and getting set up with a Stock II and some goody parts from Patriot Defense. Can anyone tell me if the 22lr conversion will work on the Stock2? It won't be a deal breaker, I just need to know if I should keep it or sell it. Also, will Match magazines work in the Stock2?
  11. Cool. I just spent some time reverse Engineering the frame to my Witness Elite Match, modeling it in CAD, and 3D printing grips.
  12. I'm still waiting for a boat to show up from Italy... I've been doing a lot of thinking; I've tried to figure out ways to get rid of the Match when it shows up. In conjunction, I'm looking at CZ Custom and CGW models. I've really been turned off by the lack of aftermarket part options and holsters for the Match. But, I've finally turned full circle and decided to keep the Match when it shows up. Because you guys are right. It IS a great gun! And it treated very well. I even won a centerfire bullseyr competition with it at my local club. When it gets back, I think I'll install a Henning flat trigger. ...I may also look at an Accu Shadow, Shadow 2, or Tanfoglio Stock2 (possibly Xtreme) to add to the collection. Any insight here would be welcome.
  13. Yeah. It sounds like I'm going to have a deal very close to that.
  14. Okay, it's time for an update - I apologize for the novel. I got my Witness sent back to EAA. I spent a week trying to figure out the best way to ship it. Thanks for everyone's support here. In the end, a local FFL gave me carbon copy of his license to take to the US Post Office. I didn't have any issues. $20 to ship Priority Mail + $14 insurance. I sent it on a Saturday morning, EAA received it Monday. Wednesday I sent an email to EAA Customer Service to confirm they received it. EAA promptly responded to my email and said that they had indeed received it and determined that they would be replacing the gun. HOWEVER, they don't currently have any 9mm's in stock, so I have to wait for a shipment from Tanfoglio. Now my wheels start turning. I proceed to get hung-up in a endless do-loop of "what if" questions. It's cost me $35 to ship it. Per their warranty verbiage in the manual, I'm supposed to pay return shipment (another $35). Plus, now that it's a new gun with a new unique SN, I'll have to pay the FFL to transfer it back to my name (another $25). Wait a MINUTE! I was going through live with no issues and all of the sudden this how deal is going to cost me over $100. That doesn't seem right. What if the new one has the same issue? I'm going to get stuck in a loop of paying $100 repeatedly until it gets made right. How much is this going to cost? How long will this whole process take? I called EAA CS (the gal I spoke with on the phone was VERY nice and professional). I explain that I work in manufacturing and that there's a casting defect. I have a level of uncertainty regarding the foundery's process control capabilities. I have no level of confidence that the next one won't have the same problem, or worse, the problem could be an inclusion or porosity in a high stress area that is not detectable until the frame fails. I proceed to just ask for my money back. (BTW - has anyone checked their pricing in the last 6-8mo? HOLY CRAP! My $600 gun is now a $1,000 gun new). The CS gal did not say "no". She said that she understood my perspective, but there policy is to repair or replace. In my case it was replace. I would have to speak with the CS Manager to do anything else. So I asked to speak with him. He's busy and has to call me back. He calls me back within the hour. I felt like he was on edge ready for me to start a fight. But I didn't. I was polite and cordial - as was he. (I'm sure in a CS role, you get to deal with a$$holes all day long - I didn't want to be "that" guy). I reiterate all of my points to the CS Manager. He understands but can't make it happen. I'm going to get the gun replaced and that's that, but I have to wait for the shipment to come in. He did say that he'd make it write with the cost of return shipping and FFL transfer. How this will happen is yet to be determined. So that's my CS experience thus far. Pretty good. I'm not getting my money back like I asked, but I still feel like they're trying to do their best to make things right. That's fair.
  15. Yep. I've come to this realization. I'm meeting up with a local FFL tomorrow. Otherwise I have to drive 30mi to a UPS facility and their hours SUCK! Getting this sent is a ROYAL PIA!
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