Delta T

The rate of heat transfer for many thermodynamic problems is directly proportional to the difference in temperature between the heat source and the heat sink. This difference in temperature is frequently referred to as “Delta T”.

Less than three weeks ago Barb and I were in Columbia where, with the humidity, the temperature felt like 114F:

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We left there and for four days cruised north through the Caribbean Sea, within a 100 miles of Cuba, to New Orleans. Even in the middle of the night you could stand on our stateroom balcony with little or no clothing and be uncomfortably warm. It was during this time that Barb won Miss Norwegian Pearl in her bikini. We were soaking up the heat and humidity before returning home.

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Last Friday morning there was snow on the ground. This morning there was more snow and it continues though the afternoon:

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Today, with the continuing large delta T and Barb’s surface area to mass ratio approximating infinity, she ran out of heat to give up to the environment. Even with thermostat set at 71F she had to put on multiple layers of clothes, a fluffy sweatshirt, and put the hood up over her head. Her hands still felt like ice cubes:

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She now has plans to visit Arizona.

Swimming in Class IV rapids

As I mentioned the other day, last Saturday Barb and I went white water rafting and I went swimming in Class IV rapids. I thought I might get some video from Riverbooty.com but they only took stills. Here are what I think are the most interesting of them (sequential frames):

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Situation good. I am the person in the right front part (closest to the camera) of the raft. Barb is the second person from the front on the left side.

Continue reading “Swimming in Class IV rapids”

Quote of the day—Barb L.

He needs to change the chant. I just can’t be enthused anymore about, “Ice cold beer.” It should be “HOT. GREEN. TEA.”

Barb L.
September 16, 2017
[Yesterday was the 5th anniversary of our first date and, among other things, we celebrated by going on a white water rafting trip as part of a company morale event. The guide would give orders such as:

  • Forward one [or two, three, or full]!
  • Back one [or two, three, or full]!

There were others, but for the purposes of this story these are the important ones.

To help keep the participants in sync, depending upon the order, we were supposed to chant one of three things in time with our paddle strokes.

  1. TEQUILA!
  2. NEED. BEER.
  3. ICE. COLD. BEER.

Here is a sample:

It got cold. Even though we were dressed warmly we all got chilled and she got cold:

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Her suggestion for the change was quite appropriate.

There are more exciting stories from this event but this will have to do until we get the video from when I went swimming in Class IV rapids.—Joe]

Quote of the day—Barb L.

I am one with the wall.

Barb L.
August 14, 2017
[We were on Highline Trail near Logan Pass in Glacier National Park and had stepped off to one side to allow people to pass at a wide spot:

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The cliff off on the other side of the trail was steep and high.—Joe]

Montana Gold Bullet factory tour

Kalispell, Montana was on the way home from Glacier National Park so Barb and I decided to see if we could get a tour of the Montana Gold Bullet factory. I have reloaded nearly 39,000 (38,684) of their bullets and have another 4,500+ in stock and ready for the Dillon 550.

I called the number on their website and set up a time for yesterday that worked for Norm and us.

We arrived a few minutes early at the unmarked warehouse like building. I took a picture of Barb out front and Norm greeted us a minute or so later.

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I asked if we could take pictures and Norm told us, “No pictures allowed.” As we went inside and started the tour Norm told us production goes down during the summer and there wasn’t as much going on as there sometimes is. I asked if the election had also affected sales. He said it had made a big difference not just for Montana Gold Bullets but across the entire industry. He had looked at demand over the years and it has gone through several cycles. The first peak occurred after Bill Clinton’s election and the last peak being just before the defeat of Hillary Clinton.

Before we moved on I asked why they used brass jackets rather than copper like almost all other bullet manufactures. Was there a technical reason or was it the just the appeal of the gold color and the neat name made possible by that color?

Norm explained their company wasn’t the first to use brass. Remington, with their Golden Saber bullets, was the first and marketed them extensively. There are other companies who also use brass in some of their bullets. There are some technical reason why brass is better in certain circumstances but that isn’t the reason why his company uses brass. And it wasn’t the appeal of color and the cool name of “Montana Gold”. Also, he didn’t come up with the name “Montana Gold”!

He said he probably shouldn’t tell the story, then proceeded to tell us how the name came about. I’ll refrain from telling the story here but I’ll drop the hint that it was a San Francisco pathologist who came up with the name “Montana Gold” for the bullets produced by Norm’s company. Norm thought it was a cool name and adopted it.

The reason they use brass is because it was forced upon them, indirectly, by the U.S. government. Many years ago the U.S. Mint began producing small dollar coins that were a copper sandwich. The demands of the U.S. Mint for the particular grade of copper the bullet company was using made it impossible for Norm’s company to get the jacket material they needed. It was either go out of business, shutdown until they could get supplies, or change jacket material. They changed jacket material.

Another story he told was of a commercial reloader who bid on a contract for law enforcement ammo specifying, and supplying samples using, Montana Gold bullets. When he won the contract and started delivering the finished product the end customer noticed the bullets were actually plated bullets which are much cheaper to make and generally considered of lower quality. They complained to Norm, who reported he hadn’t supplied those bullets. Norm now refuses to do business with that reloader and, furthermore, does not allow reloaders to mention “Montana Gold” even if they are using “the real deal” in their product.

We saw the 70 pound lead-antimony ingots they use for bullet core material. As there are no more primary lead smelters in the U.S.they get their lead from Canada. They used to get their lead from mines in Idaho not too many miles away. At one time they even considered moving to Idaho to be close to their lead source as well as some economic incentives.

Barb was particularly impressed with the extruding equipment that squeezes the lead through an orifice like so much toothpaste making a lead wire of the appropriate diameter.

I was surprised by learning that because the metals alloyed with lead (to get the desired hardness) are of a different density the ingots may not be of sufficient uniformity to meet their final bullet weight tolerances. Depending upon how quickly the liquid lead alloy is cooled to a solid after being stirred they may cut off a section of the lead wire as scrap because can cause the bullet to be too light.

The thickness of the jacket material and the consistency of hollow point formation also have an effect upon the final bullet weight. Tolerances stack up. They keep the weight of their bullets to about +/- 0.3 grains and sell bullets that are out of tolerance as “seconds” to people who take delivery at the factory who Norm is confident will be using them directly rather than reselling them.

After being shown a bin of with tens of thousands (or maybe 100’s of thousands) of jackets I told Norm about finding one in a box of completed bullets. This seemed to bother him some. He told us there were at least three different places in the process it should have been been found.

They have several machines which are dedicated to certain bullet caliber and style and a few they reconfigure as needed. We saw large multistage presses which put the lead core into the brass cup then form the cup around the lead and size it to make a completed bullet. I was surprised that the machine only produced about one finished bullet per second. That one machine takes about 40 minutes to produce one case of bullets the postman delivers to my door (actually–the sidewalk near the street, then he rings the doorbell).

I told Norm I had used their .401 diameter, 180 grain, complete metal jacket bullet until fellow shooter Don W. reported he got better accuracy with the jacketed hollow point bullets. As the price was only a fraction of penny more I tried those bullets and found Don was correct. I too got slightly better accuracy compared to the CMJs.

Norm said the decreased accuracy with the CMJs probably was because my crimping die was just a little to tight. If crimped too much it will end up as an undersized bullet. Because of the construction of the base on a FMJ, and even a JHP, as a slightly undersized bullet is fired it will expand back out and be just fine. But the base of a CMJ with the brass (or copper) disk doesn’t expand like the FMJ and JHP and “rattles” as it traverses the barrel resulting in a decrease in accuracy. By backing off the crimping die a little bit you should get the same accuracy.

Near the end of the tour Norm pointed at two work stations with women flicking bullets, one by one, off a conveyor belt. “That”, he said, “Is the most difficult job here. It takes a special kind of person to do that and when we find someone who can do it we take special care of them.” These women do the visual inspection of every bullet. They don’t work full days and yet Norm told us you can see from their faces they are drained and tired at the end of their shifts. They considered going to some sort of sensors and computer sorting but the visual computer in the human brain can’t be beat yet.

Barb and I spent nearly an hour with Norm and the stories and discussion continued until both Barb and I were in pain from standing. We had hiked over 33 miles in the previous four days and felt we could hike some more but not stand. My knees were “talking to me” in an angry tone so we thanked Norm and left with new appreciation and attachment to Montana Gold bullets.

Quote of the day—Barb L.

I am one with the wall.

Barb L.
August 14, 2017
[We were on Highline Trail near Logan Pass in Glacier National Park and had stepped off to one side to allow people to pass at a wide spot:

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The cliff off on the other side of the trail was steep and high.—Joe]

We could have fresh venison for dinner

This morning I was busy reloading ammo when Barb came back from a walk and sent me a text message before coming inside:

Two deer on the front yard.

I grabbed my camera bag and headed for the door. Barb opened it just before I got to it. My disappointed face must have been an easy read for her because she said, “They aren’t going anywhere, but I wish they would.” I carefully stepped out on the front steps and took some pictures:

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I came back inside and Barb asked if they were still there. “Yes”, I replied, “Do you want me to make them go away?”

“Yes please. I don’t want them eating my plants.”

“We could have fresh venison for dinner if you wanted.”, I joked.

“No. Just get them out of the yard.”

We went out into the yard and tried shooing them away from 15 or 20 feet away. They weren’t really interested. I had to make some aggressive moves and sounds before they finally moved onto the edge of the street. Two cars drove by and the deer came back onto the edge of the yard.

I clicked my tongue (really loud, I used to find my kids in malls and stores this way because they could hear it some distance away and knew I was looking for them). This was enough incentive for the deer to run down the street a few feet and then walk through the bushes into the neighbors yard.

I came back in the house and reported my results to Barb. “Excellent!”, she exclaimed, “I was afraid they would run at me if I tried to get them to leave.”

While it’s not all that unusual to see a deer or two when we go for a walk near the park, I don’t recall seeing any deer on our street before. It’s not like we live in some rural area. This is a normal suburban neighborhood with houses all around:

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Oh well, I thought it was nice to have the visitors even if I don’t think Barb wasn’t quite as pleased about it as I was.

Quote of the day—Barb

I like these kind of trails the least. These are the kind where you fall to your death.

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Barb L.
July 4, 2017
While on a hike near Tolmie Peak Lookout
[While I admit she had a point, I didn’t feel the impending disaster she did. But then, she was convinced I was “channeling my inner mountain goat”.

The picture below was taken by Barb at nearly the same time as I took the picture of her above:

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It was a great hike with epic views. And you don’t need to traverse the areas shown above to get the epic views like this:

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Highly recommended day hike.—Joe]

Wallace Falls revisited

Yesterday Barb and I hiked to Wallace Falls again. The trees are still extremely mossy, the falls are still beautiful (they had more water going over them this time), and I’m pretty sure the last quarter mile or so of the trail has some stairs where there were slippery rocks before. Also last time I said it took about two hours each way. But we were in and out in a little less than three hours this time. And although I was a little bit stiff for a while when we got back I was fine by the evening and today. Last time I was hurting bad enough to take ibuprofen for a few days.

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Boomershoot is over

Boomershoot 2017 is complete. It was all wrapped up earlier than ever before due to a number of issues. I’ll get into them in a later post but the bottom line is it went well even though it was extremely muddy.

One of the last things Barb and I did before heading down the hill to the motel was to take down the webcam at the road pointing at the shooting area. When we parked Barb suggested we scrape some of the mud off the trailer with the rakes we use for cleaning up target debris. We giggled as we did this after Barb pointed out it was rather amusing to be scraping mud off with a rake. I then wanted to get a last webcam photo with us in a Norman Rockwell pose, as she pretending to do in the first web came image.

We got it:

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