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Brian Enos's Forums... Maku mozo!


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About IVC

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    Finally read the FAQs
  • Birthday 12/13/1970

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    Temecula, CA
  • Real Name
    I. V. Cadez

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  1. That's a good rule of thumb. I'll stick to that and adjust the average of my load based on the standard deviation I'm getting out of my equipment and process. I'll wait until the progressive press arrives before finalizing the adjustments, though, as my SD is likely to change with the different press.
  2. Great info - thanks. My target load is 4.8 gn of N310 and it's right on the money based on the velocity I was told it would achieve out of my gun (no surprise there, the guys who built the gun would know what they are talking about). You mentioned that MG are harder and need more powder (you use a good 0.5 gn less) - how do bullet type and the extra powder affect recoil? Is it about the same, or something noticeable?
  3. My SVI Limited with 5.4 barrel has finally arrived and after having some issues with the factory ammo I decided it was time to start reloading, both to get the feeding reliability and to get the slight edge in recoil. While I'm waiting for my pre-ordered Dillon 1100, I got a Forster Co-Ax as a future backup and as a ways to develop initial loads. I have all the measuring tools, including a chrono. So far, so good. I talked to Casey over at SVI and he gave me a recipe that uses N310 and 1.200 COAL. I double checked with him that he didn't mean N320 (he didn't), so I wrote it all down, but felt a bit uneasy because N310 is one of the fastest powders out there and it's not listed in any manuals for .40. The long COAL is what made me feel a bit more at ease with respect to pressure, so I started at 0.5 gn less powder than the final recipe and put together rows of 10 rounds, each row with 0.1 gn more. I am loading Montana Gold 180 FMJ, using Federal primers #100. For the initial batch I measured each powder charge, partly to be careful, but most importantly because I didn't have a powder measure (only the trickler that came with the scale). So, now that I have been able to measure everything and collect some data, I have several questions. (1) Is there any reason to use a very fast powder for .40 Limited? I understand why one needs slow powders for, say, 38SC in an open gun, but is there any reason to prefer one over another for Limited? Any idea why such a well established manufacturer suggests N310 when it seems almost everyone else uses N320 or slower powders? (2) My primers are not getting flat, but they do get somewhat less rounded then before firing. Is this because Federals are soft, or is this a sign of building pressure? There is no cratering and the speed/PF are all within range, but I understand that this doesn't mean the pressure doesn't spike during firing (which is why I'm worried about fast powders when I cannot measure the chamber pressure directly). (3) My final load, after getting Redding x10 powder measure, has the following velocity/PF distribution: 963 ft/s +- 7 ft/s (extreme spread 24), which is 173 PF (171 - 175). However, I've had a batch that had standard deviation of 17 ft/s (about the same PF). Are these numbers reasonable to be considered "consistent," or should I work on my process? Also, as a practical matter, should I drop the PF a bit and still be reasonably safe on a chrono stage? (4) To me it seems that I should get better consistency if I use a powder measure than if I measure each load. The reason is that the scale has it's own inner inaccuracies and it only measures up to 0.1 gn. A good powder measure, on the other hand, can be calibrated once and then the inaccuracies only come from the small inconsistencies in the mechanical system that drops powder. I can measure 10 or 20 loads, divide the weight by 10 or 20, and get a very good value for the average charge weight. Is this correct thinking? As a final disclosure, I spent a lot of time in physics labs, so I am very familiar with measuring, setting up precision equipment, data collection and error analysis.
  4. There are several very specific situations that will get you close to 180. By far the most common and important one is reloading while moving towards your support side (moving left if you're right handed). This is the one that you not only need to practice, but it's often a significant factor on "close to symmetric" stages when deciding which way to go first. You'll have to keep the gun to the side in a way that will almost feel that the gun is behind you. Another one is retreating from a position and entering a new position around a barrier that is uprange. You have to make sure you don't get too excited in "trying to see it as early as possible" as if you don't do it correctly, you can lead the gun around the barrier and break the 180.
  5. If you mount a laser you'll be having target focus instead of sight focus, so generally it's not the proper training for iron sights divisions. Of course, you can always find some very specific drills where it would be helpful, e.g., you need to diagnose a specific problem and want to confirm what your muzzle is doing.
  6. Close, but let's be more accurate here. A basic Mike will set you back 15 points, not 20. It's 5 points that you could have made with an A and 10 points penalty. However, a basic no shoot will set you back 25 points - you will get "Mike No Shoot," where you lose potential 5 for alpha, another 10 for Mike and another 10 for No Shoot. If you make up the shot and avoid Mike, you will be down just 10 - you got your hits with the make up shot, but are still penalized for No Shoot. Also, there is a "Failure to Shoot at a Target" procedural penalty that you can incur if you don't send at least one round towards the target. So, if you skip a target you will get two Mikes (15 each) and additional 10 points for not engaging it. It gets a bit more complicated if you do the math on Virginia count stages (classifiers), where people can trade some of the penalties for a slightly better score.
  7. The most I've had was a "stumble" over a year ago when I was quite new to the sport. I almost missed a location that was part of my plan, so I tried to stop quickly, at which point I slid pretty hard and instinctively went to "flailing arms" to regain balance. I remember thinking only about my muzzle and making sure that any movement of my body and arms was completely constrained by the muzzle direction, so that I take a fall before I "over-flail" my arms and either break 180 or sweep myself. It turned out well and it was completely under control, but I was a bit shaken at the end of COF because it was the first time I had such an experience while running with a loaded gun. I guess training and discipline kicked in, so it's the usual "you fall back to your training in emergency" scenario...
  8. No, your math is great - I'll buy your 1050 for $200.000. That's 10x what it's worth, right?
  9. As long as you indeed mean "Limited" and not "Production" ...
  10. There is absolutely nothing stupid or clumsy about falling - it's a sport and people in sports fall. At least those who are trying. If anything, it was very smart and disciplined that you kept the gun in the safe direction, not only to avoid a DQ, but also in order not to sweep any of your fellow competitors. No "Stop" command is completely normal and good job on getting up and finishing the COF. Stories like this make me feel good about what we collectively strive for when it comes to safety.
  11. Dry fire as an activity already bends the safety rules if you want to be literal about them. You are pointing the gun at things you are not willing to destroy (4 rules system) or in the not safe direction (NRA 3 rules system). You are also putting the finger into the trigger guard when you are not ready to shoot (both systems) and you don't know what's behind your target (4 rules system). So, you have to figure out how to adjust the rules to dry fire. The primary one is about removing ammunition and ensuring no live rounds are anywhere in the area. Then you have to adjust (bend) the rules about trigger and target to allow you to dry fire and to allow you to shoot targets on the wall when you don't know what's behind it. The same goes for "safe direction." The safety rules still apply, they just have to be adjusted to create a protocol where it is as safe as possible...
  12. Desert Eagle comes in 44 Mag so it's a Pistol Caliber...
  13. Now that's a good summary and a good way to look at the evolution. Those who lost their marbles at the "some idiot stuck a compensator..." created their own game called IDPA. Let's see if PCC can trigger another separatist movement.
  14. As one of the three L10 shooters I can tell you that my reasons for L10 vs. Limited are purely legality in CA. Heck, the "PCC" in CA stands for "Politically Correct Crap"... When the magazine restrictions are removed nationwide, L10 is likely to get moved (slowly) into Limited, and SS will become the sole "low capacity major" division. So, apart from L10 which helps us poor saps in CA, the rest seems to be fine.
  15. There, fixed it. Kids today and their grammar...
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