MotorMouth

never. once the neuralizer goes off, I have a hard enough time running my plan. I just memorize and visualize where my reloads are. I also avoid taking followup shots - not worth it.

I visualize running the stages as fast as I can. If I could just get the score for my visualization, I'd be good to go...

not me. army skills. head hits pilow, I'm out cold till the alarm goes off.

If it's really your first match then my advice is stop trying to win. You can't. Instead, focus on completing the stage and shooting all A's safely. Judge yourself by your accuracy and not by the timer. The times will come later.

Can i get a copy of that too, please?

Following. Just bought a PCC and an optic. Haven't shot it in a match yet...

Does anyone actually have one of these at their range?

I never intend to do it, but I do it anyway. It's worse when you remember mid-string then switch back...

Well thanks for that...

I understand the 50 post minimum requirement. It's a high enough bar to keep the spammers out and that's excellent. But I've been a member of the site for a long time, I participate in the FB group discussions and I'm an actual legitimate (if slow) 3Gun competitor. Can I get the 50 post minimum lifted? And here's my youtube channel to prove what I say. https://www.youtube.com/channel/UCNLpMFulbedAcOG06mLVSAA Thanks, Hal

I have 5. They all dropped free from the start. Don't trim the spring though trying to get anymore in. The spring is at the minimum length. Don't ask me how I know.... Lol.

Here's me shooting one in a match... It's single action with the magwell...

I had both the CZ Custom front and rear. They cut the rear sight wider for me and I had them put dots on the rear sight. They make them so they can do whatever you want.

Well of course there's a recoil calculator on the web. Why wouldn't there be?

Not really. Once you get past free recoil it becomes a bit more complex. If you held a firearm as firmly as a ransom rest you'd include your whole body weight. But of course, even the best shooters shooting the flattest guns don't. Is first model the impact of the recoiling firearm on the shooter as an inelastic collision (even though you're already holding the firearm). So the shooter has to absorb the entire free recoil of the firearm. Think of it as catching a baseball. You may start off holding the firearm, but other than the mechanics of your grip that's irrelevant. The moment a baseball hits your glove it is no different than a firearm recoiling - you absorb its energy to decelerate it. Then it becomes a pretty crazy statics / dynamics problem that I'd need to crack a book to even start to consider. Yup. And for me, it's been 30 years since I took it. I'm a EE - ask me how the laser in your sight works and you'll get the right answer. Even if it's obtuse.

F=1/2mv^2. That is correct. Everything about the way you go there is wrong. Acceleration does not equal "mass times the square of velocity divided by 2". The only similar formula that is applied to acceleration is to measure distance under constant acceleration and does not involve mass. And in the case of a firearm, when we're talking about Force, we're talking about Kinetic Energy. The Kinetic Energy of the total system (bullet + recoiling gun + heat + noise) = The Potential Energy in the powder charge & primer. This is incorrect. You're assuming that Kinetic Energy of the recoiling firearm is equal to Kinetic Energy of the bullet. It is not. The only place Kinetic Energy is conserved is as above - Kinetic Energy of the system after firing the bullet is equal to Potential Energy in the Powder & Primer. The correct physics model to apply to the system after the bullet leaves the gun is that of an explosion. In other words, momentum, not kinetic energy, is conserved. Momentum = mv, so doubling the speed of the bullet doubles the recoil of the gun (caused by the bullet), just as doubling the mass does. As I noted in my previous post here, the model would be M1V1 = M2V2 + M3V3 where; M1 = Mass of Firearm M2 = Mass of Bullet M3 = Mass of Powder Charge V1 = Velocity of Recoiling Firearm V2 = Velocity of Bullet V3 = Velocity of Gases Escaping from Firearm As a result, your calculations about recoil increase are totally off base. Of course, that should be obvious! A 30% increase in recoil is the difference between a 9mm and a .45. The difference between a 115 & 147 at minor PF is nowhere near that large. Let's use some actual loads I have used with similar velocities as you gave. We'll asume that Gas Velocity is twice bullet velocity - quickload has some estimates, but I don't have it open now. Berrys 115 GR RN, 5.6 GR Power Pistol, AVG Velocity = 1165 FPS (~ 134 PF). Zero 147 GR FMJ, 4.3 GR Power Pistol, AVG Velocity = 905 FPS (~133 PF). For the first load, recoil impulse to the firearm = (115 * 1165) + (5.6 * 2320) = 146,967 For the second load, recoil impulse to the firearm = (147 * 905) + (4.3 * 1810) = 140,818 This shows that the lighter load has a 4.4% greater recoil impulse than the heavier load - that's a little closer to reality! Now let's take it a step further. Mass of the firearm is static - lets assume it weighs 2 lbs, or 14,000 Grains. For the first load, velocity of the recoiling firearm = 146,967 / 14,000 = 10.49 FPS For the second load, velocity of the recoiling firearm = 140,818 / 14,000 = 10.06 FPS Now, the recoiling firearm does have kinetic energy that we have to absorb, so the Kinetic Energy for each load is; First load: 1/2 * 14,000 * (10.49 ^ 2) = 770,280 (non-standard units) Second load: 1/2 * 14,000 * (10.05 ^ 2) = 702,802 (non-standard units) So the increased Free Recoil (KE of Firearm) of the lighter load is 9.6% greater than that of the heavier load. What the shooter feels is probably somewhere in the middle of those numbers. Pretty simple. To reach a given velocity, with a given projectile, requires less powder the faster that powder is. So your conclusion is incorrect; slower powders (for a given firearm, projectile, and velocity) recoil MORE than fast powders. Flame front speeds have nothing to do with this. The velocity of gases (which consists of the burned and unburned powder charge) escaping from your barrel are however key, and there is software available that models this. This is a good treatment. I didn't think of the explosion model. I particularly like that the weight of the handgun is taken into account - which is also obvious because a heavier handgun recoils less than a lighter one. However, wouldn't half the weight of your forearm also factor into this?

This is interesting. I just had this conversation today with a friend at a match. The math and physics aren't too obtuse. Recoil is nothing more than the kinetic energy of accelerating the bullet down the barrel. Newton's law states F=ma, or Force equals mass times acceleration. Acceleration is mass times the square of velocity divided by 2 so Force as a function of velocity is F=1/2mv^2 when accelerating a thing from rest - since the bullet isn't moving before you shoot it, this equation works. So now there's two things to discuss. First, the heavy bullet slow speed, vs light bullet high speed recoil analysis. Just looking at the equation, we can see that Force (recoil) doubles when we double the mass of the bullet but increases by a factor of 4 if we double the speed. For a minor power factor of 125,000 using a 147 gr bullet going 850 fps we get 53,103,750. For the 113 gr bullet going 1106 fps, we get 69,112,834. We'll ignore the units since they're the same for both. What we see here is that even though both rounds make 125k PF, one has almost 30% more recoil. So, how does this apply to powders? We know from the Powder Burn chart that certain powders burn faster than others. For instance, Titewad is faster than Titegroup. So, even though we don't know what the flame front speeds are (well, maybe someone does, feel free to post up if you've got it) we at least can extrapolate that the slower powders will, in fact, without doubt, recoil less. Will that difference be perceptible? I dunno. The bullet's are for sure, but I don't know about the powders. I tend to think that the greater part of the recoil is the bullet part, but, the flame speeds are MUCH higher, probably on order of 30,000 fps or more. Maybe we can talk one our ChemE members to discuss flame speeds. H

What a thread. I was just looking for advice and what I got was quite entertaining. Oh, and I want to apologize to Carbon Arms - you guys are the only brand of shell holder that I don't have two of. And, damn you Taccom. No sooner than I buy my second IP carrier, you update your website with the Duelin Dueces. Now I gotta buy one of those. ;-) Hal

Glock 35 in .40 for Limited is good to go. You'll need a trigger, a mag well, the Carver custom front weight with accelerator pedal and their modified holster. I wouldn't waste money on a barrel. And, in my humble opinion, stippling and grip reductions are also a waste of money. The grip reduction even wrecks the gun. Glocks work because of that funny grip angle. If you want a Glock without the funny grip angle, buy an M&P. The other option for low cost is get a 34 and shoot Limited Minor. You'll make up time with faster shot recovery and your scores won't be as bad as you'd think.

+1 on this. I have the DA though. Great option.

I agree. I run an 11lb in mine but I shoot IDPA with 128k PF.

I have one. Yes it is. It's fantastic.

I shoot a lot of Indoor IDPA. Let them bounce. It won't hurt them. Particularly if they're empty. I have shot some indoor USPSA also and it still pains me to drop the CZ mag with ammo in it no concrete. But, honestly, there's no issue with it.

15 minutes a day. I use the laserlyte targets. love them.

I keep my hand with the gun fully extended and I rotate so my index finger is up. I look like an idiot running around with a gangsta grip, but it's fast because I don't have to extend my hand again when I get to the next shooting box and it's safe because the RO can clearly see my finger on top of the gun and along the rail. Although, honestly, most of time I'm transitioning from one shooting position to the next, I'm probably reloading.