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About GeneBray

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    Gene Bray

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  1. Ergo, my comment about subjectivity.....as competitors our opinion is not the one that matters, the RMs decision is what counts unless you arbitrate. I know GMs, who earned the classification through hard work, skill, and only shooting classifiers once and never practicing one prior to a match, who think a heavier pistol helps with shot-to-shot control on a target but find a lighter pistol gives them quicker and more controlled transitions. And, that is another of those discussions which will never be answered, but is another good reason for beer and discuss.
  2. A comments not on the mags but on USPS CO rules (which I am presuming you are referencing) and the need for a backup pistol. Using a P10C to replace a Shadow (I wish you had stated the exact Shadow model since there are numerous Shadows on the Production gun list). First, I believe the USPSA rules are not very specific regarding a substitute firearms and therefore much of the decision is the desecration of the RM. Not that, that is bad, but lack of specific guidance means there is a good chance for different rulings from different RMs under the same set of circumstances. Now, lets look at the rules: " The substitute firearm satisfies the requirements of the relevant Division." For the sake of this discussion, I will assume you meticulously and ausiduously conformed to USPSA CO equipment rules and therefore both pistols are rules 100% compliant. " In using the substitute firearm the competitor will not gain a competitive advantage." This is where there could be problems. Assume you start the match with the Shadow, and you want to move to the P10C. Is there a competitive advantage? Some would say no because trigger of the Shadow is DA/SA and is generally assumed to better than a striker fired pistol. The weight range for Production legal Shadows range from 38 to 47 oz. The weight of a P10C is 26 oz. -- a range of 3/4 lb. to 1 lb. 5 oz. difference. Does a lighter pistol provide a competitive advantage? This is where the decision can and probably does vary RM to RM based on their experience, understanding of the rules, and their understanding and beliefs as to what constitutes a competitive advantage. Doubt that arguments over whether a lighter pistol offers a competitive advantage or not will be settled in either of our lifetimes. But, it is a good reason to drink beer and argue the point. Now, let's assume the converse. You decide to shoot the P10C and it breaks, and you wish to switch to the Shadow. Almost without a doubt, a RM who understands the rules and follows them, would rule the Shadow has a competitive advantage. DA/SA over striker fired, heavier firearm so less perceived recoil, and probably more more barrel heavy which would aid in muzzle flip. The above is hypothetical. Now, let's talk practical. A Level I match. Some clubs would let you change regardless of which pistol you start with. A local match, nothing riding on it so no harm, no foul. Is that the right call? I my opinion no, but not naive to think it doesn't happen. USPSA does not say interpret the rules one way for a local match versus a higher level match. USPSA says and expects the rules to be applied uniformly at all levels. Move to Level II or III and the more likely you are see the rules enforced and then we are back to the first part of the discussion and the subjectivity of what constitutes a competitive advantage when comparing two firearms both rules compliant for the declared division. Without a better definition of, or examples of competitive advantage, the application of the rule is more subjective which loops right back to the comments on Hope this gives you some food for thought as to what to used for a backup pistol and some potential problem areas if you are unfortunate enough to have to change to a backup during a match.
  3. Good discussion. I would like to bring up some points and see what the general comments are. As to some of my background, I shoot USPSA/IPSC and reload. More decades ago than I care to count I earned an undergraduate degree in mathematics. And, more recently (but still measured in decades), a MS Systems Management. The degree contained approximately equal parts of management courses, and math focusing on statistical analysis, time value of money, and other areas necessary the technical analysis and management of manufacturing and systems procurement. For the following, lets assume for the sake of discussion we control the following with the degree our measurement systems allow 1) cases volume, 2) powder charge, 3) bullet weight and dimensions, and loaded ammo COL. Basically, doing the best one can to eliminate variables in test results. Two variables we cannot control, in most cases are relative humidity, to which the powder is exposed, and temperature (OAT and ammunition temperature) at the time of testing. Also, OAT, humidy, and density altitude all affect bullet velocity. I suspect, but do not know, how much affect it would have at 10’ when chronographing. Lets say for discussion we are testing 9mm Luger using a 125 gr bullet. We want at 130 PF so the velocity should be 1,040 fps. Holding everything constant except for bullet weight which we will very by 0.1 gr and then chronograph the loads. What are the velocity changes as the weight changes? After 20 years of reloading for competition, I honestly don’t know except that it is small. I ran numbers based assuming the only variable was bullet weight which varied by 0.1 grain over a range from 124.0 to 126.0 grains, and then changed velocities by 1 to 5 fps per 0.1 grain a weight and calculated PF. Not until you reach 5 fps do you drop below a 125 PF. I am certain that 9mm velocities do not vary 5 fps per 0.1 grain variance in bullet weight. My assumption was the only variable is bullet weight and that lighter bullets result in higher velocity and the converse as the weight goes up. It may well be just the opposite, but reversing the velocity change doesn’t change the result except as whether the change is at the light or heavy end of the data. Most (if not all) modern smokeless powders are hydroscopic means they absorb water and do so readily. Water affect the powder density which affects it burn rate and volume of gas produced. My guess both affect the the chamber pressure meaning there is a direct affect on velocity. There is a reason most powder and press manufacturers say don’t leave powder in the press. Reload, empty and store in a seal container. But, every time you open a jug of powder you are changing the humidity of the air in the container. Seems sort of like a “no way to win”. Also, nitroglycerin is very temperature sensitive. It becomes more reactive as temperature goes up. I believe most, if not all double based powders, use some type of nitroglycerin in their formulation. In practice no one (I suspect) checks case volume for several thousand case to find 300-600 that are the same with in a range. Nor, do most shooters weight bullets to get 300-600 within a few tenths of a grain of each other. (I am certain some may.) So, no matter what press you use there will be some variation in case volume, bullet weight and dimensions, powder charge, powder humidity with affects it density, and COL, and all affect the velocity. My approach has been to always chronograph 10 rounds at a time. I have a load which veryconsistent with regard to chronographing for over 10 years. And, that is chronoing using my visible light CED and chronographing over dual IR CEDs at major matches. I check the chrono using that load to ensure I am getting good readings. The test ammo varies ~10 fps over a temperature range of ~40 degrees to 85 degrees, and is typically single digit SD for 10 rounds.It is Titegroup if anyone cares. When I analyze the data I always look at the first three rounds and the 10 rnd. string. I ensure both consistently give me the required PF for the load/gun. Ten days out I start monitoring weather for temperatures. Based on forecast I may adjust the load 0.1 to 0.2 grains up or down. And, almost never do I adjust down. Always make power PF in 9mm and .40 S&W. Several years ago, I had problems twice with .45 ACP and went minor. To this date, I cannot identify a problem that caused low velocities. The major difference between the calibers is I use coated lead bullets in .45 ACP, and jacketed for the others. I do knowthere is more variation in bullet weight and dimensions with lead bullets than jacketed. And, I see larger extreme spreads in velocity with lead than jacketed. It is to be expected without a lot of weighing tocontrol variables. I do weight anywhere between 50 to 200 bullets to get weight stats for match bullets. I keep the numbers with me for 1, 2, and 3 standard deviations and will check the bullet weight from chrono to decide what to do if I ever get to “weight it or shoot it.” I hope some can comment and expand on this. Maybe my comments will be helpful for some one.
  4. My experience with a 13# main spring in an SP01 was 100% reliability with anything except Tula and Wolf and that without an extended FP and reduced power FP spring. That said both the extended FP and reduced power FP spring certainly will not decrease reliability.
  5. Ditto with Tula and add Wolf too. Maybe more than 1-2%. Deep seating helped, but failed to solve the problem.
  6. I've never had problems related to CCIs and using them on my 1050. Gone thru nearly 20k or more. That said there are a lot of things in reloading that can cause primer issues. Typically, the only primers I've had issues with ignition and an 11.5# main springs were Tula and Wolf.
  7. GeneBray

    TSO 40SW Rear Sight

    If the sight adjustment places the rear blade low (meaning with pressure on the bottom of the blade from the slide), the sight is subject to fatigue fractures. Cheby, can you post a picture of fracture on the sight (meaning the edge where the sight broke)? Or, inspect then ends of the break. If dull gray, and granular, the break is almost certainly caused by fatigue. The picture below show the result of no undercut on a fixed rear sight on my SP01. The slide exerted pressure on the rear of the sight and the result is a fatigue fracture. When the sight was replaced I ensured approximately 0.001"-0.002" clearance and the sight hasn't broken since. Sight broke at 38,389 rnds. The replacement sight has 29,133 and so far is doing fine.
  8. GeneBray

    Bullet nose up- S2 OR

    It is missing all the graphics but the text is here. A great article on bullet profiles, COL, and feeding. You might be able to find a copy with graphics if you are a good googler. http://www.gunsite.co.za/forums/showthread.php?65613-Bullet-Design-And-Feeding-Reliability-In-Semi-Automatic-Pistols
  9. 67k through 8 stock SP01 mags plus dry fire, and they are still running w/o issue. Mec Gars get a lot of positive comments here and can be found cheaper than stock SP01 mags. I'll run the stocks until they quit on me and then decide. Probably go with Mac Gar based on $ unless I find a deal on stock CZ SP01 mags.
  10. I'm curious as to what the specifics are with regard to stage planning and execution problems. Seems to me details on what your stage planning and execution problems are is more germaine. More rounds at the start signal may not solve/help mitigate the problem(s). On well designed stages, more rounds may make the planning harder not easier since you should have more options on how to shoot the stage.
  11. We need to know what division in which you want to compete. Rowdyd I think hit the nail on the head. I am a CZ shooter but have shot Glock 34s and S&W M&P 9 Pro in competition. USPSA Production. That said I started with a CZ SP01. Won a the S&W. Hadn’t gotten thru the first mag on during a practice session with the S&W before thinking, “Oh, crap! Now I have a decision to make.” (Well, a close paraphrase.). Good trigger, pointed and handled well. The short story was I had spares and a complete rig for the CZ. Would have had the expense of getting the same for the Smith so sold it. The answer to your question may be you can’t go wrong with either. However the CZ has been on the market for some time. More experience in the shooting community with and more parts. Walter might get there but it may well be a long, hard row to hoe.
  12. Depends on what you want to use the pistol for. If shooting USPSA you cannot disable any safety in Production/CO. IDPA have not idea. You can simply remove the FP block stop and spring. Use the lifter as the spacer. I have 1st hand experience with this until USPSA changed their rules. Also a polishing and lighting the FPBSS makes a lot of difference. I feel the FPBS when slowly dry firing the pistol -- working on the DA 1st shot. Never notice it in practice or a match.
  13. Polishing on the internals will help a lot. There is a great link on Enos on what to do --
  14. I shoot an SP01. I've never had issues with reduced power FPS and live/dry fire.. My question is you are using snap caps when you dry fire, aren't you? If not that is a contributor to the FP problem. If you are, they may be worn out and need replacement. I used 13, 11.5, & 8.5 pound MSs.
  15. I like Clays although don’t recall testing in 9mm. For me it doesn’t meter as well as other powers with sample grain sizes. Other than not being as clean as N310/320, and what is, that is the only down side to Clays. Sent from my iPhone using Tapatalk
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